List of confirmed special sessions


Theme A: Fluid mechanics and basic hydraulics Conveners:                
  • Sándor Baranya, Budapest University of Technology and Economics, Hungary
  • Nils Rüther, Norwegian University of Science and Technology, Norway
The resuspension, transport and deposition, as well as selective transport of sediment particles, has a direct influence on river morphology. As such, near-bed sediment transport affects the natural evolution of the river bed, the dynamics of bedforms, the state of armor layers, the porosity, the conditions of benthic habitat and, consequently, many kinds of anthropogenic use of the rivers, e.g. fluvial navigation or drinking water supply. Despite the clear importance of sediment transport phenomena in river management, researchers still have limited knowledge in this field, due to the complexity of the physical flow-sediment interaction processes taking place and due to sparse measurement techniques for continuous data, which could give insight in these processes. Therefore, at the forefront of research, significant development of experimental research infrastructure and enormous expanding hardware capacity is happening, as well as completely new ways of investigation are conquered. For instance, fine-scale image-based sediment composition measurement methods provide new insights into the movements of individual sediment particles. Additionally, fine-scale turbulence measurements using acoustic, laser, or image-based techniques enable the better understanding of the complex flow field within the boundary layer, even in prototype scale. Besides the state-of-the-art experimental methods, new computational modelling techniques, such as particle-based approaches and the application of artificial intelligence, support the analysis of fine-scale transport processes. The goal of this Special Session is to gather researchers and practitioners, working in the field of fluvial sediment transport, to introduce and discuss their latest scientific results with a main focus on the following topics (but not restricted to):
  • novel measurement methods of bed shear stress;
  • fine-scale turbulence measurements as well as near-bed turbulence;
  • image-based near-bed sediment transport analysis;
  • image-based substrate analysis;
  • analysis of bed armouring processes;
  • quantification of substrate porosity;
  • quantification of active layer thickness;
  • computational modelling of bedforms;
  • article-based numerical modelling methods;
  • development of artificial intelligence for sediment transport analysis;
  • influence of grain shape on morphodynamics;
  • measurement of incipient motion.


Theme B: Hydraulic engineering Conveners: • Cristiana Di Cristo, University of Naples Federico II • Michele Iervolino, Università della Campania “Luigi Vanvitelli” Fluvial hydraulics concerns the flow of water in rivers and channels, along with the active interaction with erodible beds, the sediment transport and the consequent morphodynamic changes. These problems are studied at different scales, through theoretical, numerical and experimental modelling. In the last decades, research advances are taking place in all the fluvial hydraulics aspects and technical applications are gaining a novel vision, being more and more oriented aiming towards ecological-friendly river management and sustainable engineering design. For this Special Section original contributions dealing with problems of fluvial hydraulics and relative applications are invited. Contributes based on field studies, numerical simulations and laboratory experiments are suitable. The objective is to showcase and share state-of-the-art scientific knowledge in research and applications in the field of fluvial hydraulics. A non-exhasustive list of pertaining topics comprises: hydrodynamics of river flow in unsteady condition and/or in channel with complex geometries; relationship between flow and turbulence structures and sediment transport; flow interaction with structures also in presence of erodible bed; river morphodynamic evolution; impact of floods and effects of failure of hydraulic structure, such as levees or dams. Selected works will be suggested for the publication on the Special Issue “River Hydraulics and Applications” of journal Water (, I.F.2.524). All the papers considered for publication will be subject to the review process according to the journal requirements. Special Issue "Fluvial Hydraulics and Applications" call for papers:

Theme B: Hydraulic engineering Conveners:                
  • Manousos Valyrakis, University of Glasgow, the United Kingdom
  • Rui Ferreira, Instituto Superior Técnico Universidade de Lisboa, Portugal
  • Massimo Guerrero, University of Bologna, Italy
  • Katinka Koll, TU Braunschweig (Technical University of Braunschweig), Germany
Advances in hardware and software, as well as conceptual advances, have widened the range of tools and methods available to measure key flow variables in fluvial and other natural or built environments. Nowadays, a range of laser (3D LDV, stereo-PIV), acoustic (ADV, ADCP, ABS) and ultrasonics (UVP) are typically deployed towards obtaining flow field variables, at an unprecedented spatiotemporal resolution, expanding the range of scales and applications, driving our understanding of fundamental dynamical flow and transport processes as well as leading to improved engineering designs. For instance, geomorphology and environmental hydraulics researchers, as well as engineering practitioners, customarily deploy established velocimetry methods such as ADV or PIV to retrieve all three components of the velocity field at a high space and time resolution. Optical flow methods are increasingly used by industrial flow communities along with LDA/LDV and ultrasound velocimetry. Acoustic techniques (such as UVP or ADCP) enable the investigation of velocity fields along with sediment transport in harsh conditions, especially where turbidity may hinder optical-laser penetration. The domain of application continues to expand from the micro-scale (e.g. eco-biological and industrial applications in the field of micro-fluidics) to river reach scales and coastal areas (in the case of planar LSPIV and ADCP-ABS). Pressure can be derived from time-resolved 3D PIV while data assimilation techniques allow for hybrid experimental-numerical flow descriptions with higher temporal or spatial resolutions. Laser-based methods can be used to reconstruct detailed bed surface morphologies, while advances in photogrammetry and 3D scanning enable the reconstruction of detailed bathymetries of channels and free-surface profiles. In addition, stone tracing (RFID), particle instrumentation (MEMS) and optical methods (PTV, LSPIV which can also be drone-enabled), allow from directly assessing particle transport rate and identifying its dynamics, to indirectly measuring flow field quantities. This session is promoted by the IAHR committee of Experimental Methods and Instrumentation and aims at bringing together researchers developing or using non-intrusive flow measuring techniques, including but not limited to the methods described above, finding a breadth of important applications. A selection of the most impactful papers will be published in a special issue of a Scopus indexed journal. For further information on the special issue in Water visit

Theme B: Hydraulic engineering Conveners:                 The session covers various hydraulic industrial applications, including pipe flows and open-channel flows, which can be either Newtonian or non-Newtonian and can carry solid particles.

Theme B: Hydraulic Engineering Conveners:
  • Pawel Przygrodzki, Institute of Meteorology and Water Management- National Research Institute (IMGW-PIB), Poland
Due to climate change, modeling of extreme hydrological events is a particularly important aspect of hydrology and other fields of science associated with it. Hydrological and hydraulic modeling is used in operational (synoptic) hydrology, which aims to monitor the hydrological situation and warn against extreme hydrological events. In Poland, IMGW-PIB fulfills the tasks of hydrological protection. Modeling is also used in the preparation of hydrological studies, for example for the needs of the EU Flood Directive. The development of hydrological and hydraulic modeling has been very intensive in recent years. Along with the development of hydrological and hydraulic modeling, ways of developing the data necessary for their implementation are also developing. Hydrological data should be considered one of the most important. Tools and methods of analyzing measurement data are also developing. This thematic session on the presentation of methods of modeling and analysis of extreme hydrological events are an excellent medium for exchanging information and views in order to further develop products.


Theme C: Environmental hydraulics Special session CS1 – Buoyancy Driven Flows will be run as a live discussion event on MS Teams (click the Join button). Each abstract included in the session will be firstly introduced by one of the convenors (in the alphabetical order shown in Oral Sessions C). The presenting author then be given the opportunity to provide a very brief summary outline of their study. Questions are then requested from the session participants for each paper (either by writing in the meeting chat or by raising a hand). The author will then have the chance to respond to these questions within the timeframe allocated to each paper.  As time is very limited, we expect each paper to have about 5 minutes for this introduction and discussion. Please note: that all participants in the session are requested to watch all the presentations in advance of the session. Conveners: • Alan Cuthbertson, School of Science and Engineering, University of Dundee • Claudia Adduce, Department of Engineering, Roma Tre University • Janek Laanearu, School of Engineering, Tallinn University of Technology • Rob Dorrell, Faculty of Science and Engineering, University of Hull The special session welcomes contributions on all types of natural and man-made flows that involve buoyancy as a main driving force. This session will cover all environmental and geophysical flow problems within riverine, estuarine and marine systems, in which density differences are initiated by variations in salinity, temperature and/or suspended particulate loads. Some example areas include (but not exclusive to): gravity or turbidity currents; turbulent buoyant jets and plumes; buoyancy-driven exchange flows; and internal waves. These contributions can be either on fundamental or applied research topics in these or related areas, and can present findings from experimental, analytical, computational or field studies.

Theme C: Environmental hydraulics Conveners:                
  • Kaisa Västilä, Aalto University, Finland
  • Juha Järvelä, Aalto University, Finland
Vegetation is a key element in nature-based solutions (NBS) in water management that adopt features and functions of natural ecosystems into managed water systems. Vegetation can be used to trap and process suspended sediment, nutrients and pollutants and protect against erosion while enhancing biological and morphological diversity. Use of vegetation may entail tradeoffs such as the release of dissolved nutrients, unwanted encroachment and excessive deposition. In vegetated hydro-environments, there are still many unknowns such as the reliable description of the influence of complex natural vegetation on hydrodynamics, mixing and retention of substances, on bed load and suspended sediment transport and on morphological development. The practical hydraulic challenges relate e.g. to the prediction of water levels at different design flows, the optimal design of the systems, the technical and ecological aspects of vegetation maintenance, and the life cycle and maintenance of the designs considering e.g. the aggradation and loss in conveyance. This session aims to bring together researchers and managers to discuss the hydraulic challenges, solutions, trade-offs and unknowns related to the usage of vegetation in nature-based water management. We invite contributions from different natural, maintained and engineered environments, including rivers, riverine floodplains, lakes, agricultural channels, urban water features, and constructed and natural wetlands. Contributions may range from scientific research findings to the modelling of vegetated systems and the development and application of nature-based hydraulic designs. The insights of the session are expected to aid towards creating tools, developing designs and enhancing the performance of vegetated nature-based solutions.

Theme C: Environmental hydraulics Conveners:                
  • Ryszard Staroszczyk, Institute of Hydro-Engineering, Polish Academy of Sciences, Gdańsk, Poland
The objective of this special session is to gather researchers working on problems encountered in coastal and transitional waters (river estuaries, deltas and lagoons), with the focus on hydrodynamic, lithodynamic and floating ice-involving phenomena. Theoretical, empirical and numerical contributions addressing the above issues are welcome. Research topics covered in this session include:
  • fundamental approaches to solving problems of theoretical and practical importance occurring in coastal and transitional water hydraulics;
  • sediment/salt/nutrient/pollutant transport processes driven by surface waves and water currents;
  • seabed morphology changes due to waves and currents;
  • floating ice modelling (sea-ice pack evolution, ice jams, wave—ice—structure interactions);
  • related topics, not listed above.

Theme C: Environmental hydraulics Conveners:                
  • Steve Wallis, Heriot-Watt University, the United Kingdom
  • Ian Guymer, University of Sheffield, the United Kingdom
  • Russell Manson, Stockton University, the United States of America
The management of water quality in rivers, urban drainage and water supply networks is essential for ecological and human well-being. Predicting the effects of management strategies require knowledge of the underlying physical, chemical and biological processes covering spatial scales of a few millimetres (e.g. turbulence) to several hundred kilometres (e.g. catchment topography), with a similarly large range of timescales from milliseconds to weeks. The evolution of water quality indicators such as dissolved oxygen concentration, chemical pollutant levels and deviations from ambient temperatures is complicated because they depend on spatially and temporally varying contaminant concentrations, which are driven by a (often uncertain) distribution of unsteady loadings. Current water quality modelling methods range from complex three-dimensional computational fluid dynamics models, for short time and small spatial scales, to relatively simple one-dimensional and/or network models, for large scale systems. The latter category are essential for delivering economic, fast and practical solutions for routine management of water industry functions as well as for providing guidance on emergency responses to pollution incidents. A proper representation of solute mixing is required for these models to be reliable. Mixing effects in channels and pipes of uniform geometry can be represented with confidence in highly turbulent, steady flows. However, in the majority of water systems, the standard model predictions often fall short because of knowledge gaps, for example when faced with non-uniform geometry, regions of low turbulence, unsteady flows or uncertain contaminant sources. This Special Session seeks to present papers that will address some of these issues, stimulate discussion of novel ideas and provide information that will improve confidence in the underpinning modelling systems. Further development of this output will have the potential to deliver a step change in the predictive capability of river system, water supply and waste water network models. The Special Session will be of interest to researchers, environmental regulators, engineering consultants and water utility companies. The convenors are keen to attract papers on laboratory investigations of mixing mechanisms, full-scale field measurements, analytical and numerical models, analysis of meta-data and descriptions of pollution incidents. Conveners are planning to organise a special issue in Acta Geophysica.

Theme C: Environmental hydraulics Conveners:                
  • Ingo Schnauder, Institute of Hydraulic Engineering and Water Resources Management, TU Vienna, Austria
  • Michael Nones, Institute of Geophysics Polish Academy of Sciences, Poland
Large instream wood (i.e., trees, trunks, branches and roots) has recently gained more attention in Europe, in both science and river engineering practice. One the reason is the ecological status of our rivers according to the EU-WFD and in particular the deficits in river morphology and physical habitats. Large wood greatly contributes to flow, sediment and habitat diversification and is a cost-effective measure in river management. However, the benefits come to the cost of a potential increase in flood risk which still has to be considered as incalculable to some extent. The removal of large wood from the rivers has been the technical answer to this insecurity and with it the disruption of natural wood dynamics involving mobilization, transport and redeposition. Calculability is thus a central aspect and we still lack calculation methods and design principles to provide a sound guidance for river engineers. The session will focus on approaches to quantify the benefits of large woods in rivers in all the fields involved and based on field, lab or numerical studies:
  • flow and turbulence, roughness and drag, dispersion;
  • sediments and morphodynamics;
  • wood transport, mobilization and deposition;
  • habitats and ecology;
  • improvements according to EU-WFD;
  • flood risk and clogging assessment;
  • forestry and wood recruitment;
  • restoration techniques.
The session is particularly open to researchers and river managers from Poland and its neighboring eastern countries, considering that many rivers in these regions are still in a better state regarding large wood than elsewhere in Europe. Conveners are planning to organise a special issue in Acta Geophysica.

Theme C: Environmental hydraulics Conveners:                
  • Luca Solari, University of Florence, Italy
  • Tim H M van Emmerik, Wageningen University and Research Center, the Netherlands
To date, efforts to understand the sources, transport and distribution of plastic pollution have mainly focused on the marine environmental compartment. However, it is widely acknowledged that the majority of marine plastic litter originates from rivers and in general land-based sources. The aim of this session is to gain a better understanding on the sources, transport, distribution and impact of plastic pollution. We invite contributions focusing on the study of plastics in rivers and in general in all aquatic compartments (freshwater and marine). Research topics include, but are not limited, to sources, transport, distribution and pathways of plastic pollution in rivers and different aquatic compartments; degradation mechanisms for different plastic materials under range of environmentally conditions; novel detection and measurement methods; bioaccumulation; and mitigation. Picture by Tim van Emmerik © @TimVanEmmerik on Twitter

Theme C: Environmental hydraulics Conveners:                
  • Alessandro Pagano, Istituto di Ricerca Sulle Acque (IRSA-CNR), Italy
  • Leon Kapetas, Centre for Sustainable Development, Department of Engineering, University of Cambridge, United Kingdom
  • Irene Pluchinotta, Institute for Environmental Design and Engineering, University College London, United Kingdom
  • Elena Lopez Gunn, ICATALIST, Spain
Water is essential to sustain human and planetary health and well-being, as well as economic activities (e.g. agriculture). Water is thus required for different purposes by a multiplicity of (often) conflicting users, with potential issues of overexploitation and free-riding. Water management faces problems such as the multiplicity of decision-makers, the complex networks of governance and distribution, and the interconnectedness of the dimensions involved (e.g. environmental, social, etc.). A growing number of issues is expected to emerge concerning sustainable water resources management. Conventional approaches and practices might not be able to deal effectively with the increasing pressures and future challenges (e.g. climate change, population increase etc.). This holds true for water-related risks as well (floods and droughts), whose magnitude and frequency is expected to increase. Within this context, there is a significant need for operationalizing the integrated water resources management paradigm in a more flexible and innovative way, relying on integrated, participatory, technically and scientifically informed decision support tools and models. Actively involving stakeholders in the design and implementation of management measures for water resources including dealing with water-related risks is crucial for two reasons. First, to explicitly take into account local/expert knowledge as well as specific needs and objectives in the decision/policy-making processes. This represents an added value that can be captured in integrated models, providing a comprehensive and systematic view of complex systems. Second, decisions related to water allocation and management have many implications in terms of multiplicity of impacts and societal needs. These should also be integrated in models, in order to build a shared vision of the whole system and to be able to analyse the potential impacts of alternative strategies, thus helping to improve their effectiveness. This allows strategies to be flexible and thus broadly accepted, adopted and successfully implemented in a dynamically evolving environment. The session aims to collect a broad range of experiences related to stakeholder involvement in integrated water resources modelling for management, including water-related risks analysis. The session will undertake a critical analysis of different tools and methods for better stakeholder engagement, including a discussion of main advantages and limitations.

Theme C: Environmental Hydraulics Conveners:
  • Prof. Donatella Termini, University of Palermo, Italy
  • Prof. Michele Mossa, Polytechnic University of Bari, Italy
Understanding fundamental hydrodynamic characteristics, related turbulent diffusion and mixing properties, in the presence of vegetation is important for wenvironmental processes, such as storage of nutrients and chemical tracers, sediment transport and mixing of transported quantities. This session is focused on processes of transport and dispersion induced by turbulence in the presence of vegetation, for different plant density, submergence and stiffness. We encourage submissions which: 1) investigate mechanisms of flow-vegetation interaction, including the influences of ecologic, hydrologic, or geomorphic processes over a wide range of spatial and time scales; and 2) present new insights derived from simulating or modeling these interactions with experimental apparatus, field measurements and numerical simulations.


Theme D: Hydrology and hydraulics of cold regions Conveners:                
  • Linmei Nie, Centre for Sustainable Development and Innovation of Water Technology (CSDI), Oslo, Norway
  • Jinmei Lu, the Arctic University of Norway, Norway
  • Linus Zhang, Lund University, Sweden
  • Tiina Leiviskä, University of Oulu, Finland
  • Tong Yu, University of Alberta, Canada
The regional-scale projections are predicted the future climate in the Nordic countries to be warmer, wetter, and more windy, accompanied by increased frequency and/or intensity of extreme events, leading to such as flooding and/or droughts, having also impacts on water quality, environment, ecosystem services and biodiversity. Climate change and its impacts in the Arctic region are thus more significant than other regions in the world. Therefore, it has drawn attention of politicians and interests of researchers to assess the risk and vulnerability, planning and design of adaptation or mitigation measures. In this session, we aim to bring together the synergy of research in the cold regions, exchange and disseminate knowledge, research methods and recent results on climate change response, and mitigation or adaptation measures in this particular region  including, but not limited to, the topics of:
  • hydrological response of cold region climate change;
  • hydrological modelling in cold climate;
  • advances in flood forecasting, modelling and mapping;
  • urban flooding;
  • mega data;
  • blue-green solutions and performance assessment;
  • water quality, water pollution control and remediation;
  • measures and repairing technologies of structural defects and new materials.
Conveners are pleased to inform you that a "Call for papers for the special issue, Journal of Water and Climate change (JWCC) has been published in the journal's website: Title of the Special Issue is "Integrated assessment and adaptation to climate change impacts in cold regions". Submission opens: 01. Oct. 2020, deadline 31.03.2021. Expected publication: October 2021 (accepted papers published online immediately ahead of issue publication). All IAHR 2020 participants are welcome to submit their paper manuscripts, if their scientific works fall into the topic areas of the Special Issue.


Theme F: Hydro-extremes, global changes Conveners:                
  • Roberto Ranzi, Department of Civil and Environmental Engineering, University of Brescia, Italy
  • Kazimierz Banasik, University of Warsaw, Poland
The Session aims at attracting experts in the assessment of the impact of climate variability and change on water resources availability and management. Long duration time series analyses and assessment techniques for changes in extremes are welcome. On the engineering side structural and non-structural adaptation measures to the observed or projected changes in urban hydraulics, river and environmental engineering, coastal engineering will be presented.

Theme F: Hydro-extremes, global changes Conveners:                
  • Leszek Hejduk, Warsaw University of Life Sciences, Poland
  • Beniamin Więzik, Association of Polish Hydrologists, Poland
  • Andrzej Wałęga,University of Agriculture in Krakow, Poland
  • Paolo Porto, Mediterranea University of Reggio Calabria, Italy
The main aim of this special session is to present the latest achievement in research on small catchment processes with the special emphasis on hydrology. It is also the summary of long-time investigation of Prof. Kazimierz Banasik in small catchments. Contributions, connected with small catchment investigation with special attention on the following topics are welcome: flood and drought modelling with focus on rainfall-runoff models, impact on land management on flow, impact of climate change on hydro-meteorological processes, sediment transport and erosion, water quality measuring and modelling, the uncertainty of flow estimation, techniques of measurements, groundwater.

Theme F: Hydro-extremes, global changes Conveners:                
  • Renata J. Romanowicz, Institute of Geophysics Polish Academy of Sciences, Poland
  • Wen Wang, Hohai University, China
The session is focused on the direct and indirect causes of drought and the processes governing the transformation from meteorological to hydrological drought. In particular, the feedbacks between land use and drought propagation are of interest for the purposes of sustainable water management and drought prevention. Conveners are planning to organise a special issue in Water MDPI or Journal of Hydrology.

Theme F: Hydro-extremes, global changes Conveners:
  • Iwona Kuptel-Markiewicz, Institute of Geophysics Polish Academy of Sciences, Poland
The session is intended to focus on statistical methods useful for hydrological extremes modelling. Statistical methods for the analysis of hydrological data has a long history and continues to be an intense research topic. A subject of the session includes both uni- and multivariate extreme value theory, copulas, Bayesian theory, etc. It can unite past hydrological information for the sake of contemporary hydrology within the context of environmental and climatic changes (but not only). The subject also covers the study on compound events, which combines the physical processes leading to hazards such as floods or droughts. An example can be extreme precipitation, river peak discharge and storm surge, which change the interactions in the face of climate change and make projections of future hazards based on single driver difficult. The session can be occasion to bringing together experts (academics and practitioners) as well as young scientists creates a very good atmosphere for scientific debate and learning. The session will be dedicated to the memory of our Master and Friend Professor Witold G. Strupczewski, outstanding hydrologist, educator, good man, on the second anniversary of his death. For the participants of this session, the special issue of Water MDPI journal "Statistical Approach to Hydrological Analysis" is dedicated, see details: Depending on the quantity and quality of accepted articles, a discount of minimum 20% will be applied.

Theme F: Hydro-extremes, global changes Conveners:                
  • Tomasz Dysarz, Poznan University of Life Sciences, Poland
  • Mariusz Sojka, Poznan University of Life Sciences, Poland
Nowadays flood hazard mapping has become a fast-developing area, linking modern technologies of computational river hydraulics with geoformation. Great interests in this scientific field stem from the necessity of flood damage reduction and political response, like implementation of EU Flood Directive in all EU states. The development of computer modelling technologies enables new approaches to old problems, e.g. the automated map generation from simulation results has become a standard. The special session is aimed at presentation and discussion of new approaches to development of flood hazard maps including linkages between river flow modelling, rainfall-runoff modelling and GIS techniques. The broad impact of uncertainty related to several parameters involved in the simulation process is expected to be discussed. Interesting aspects such as the impact of other processes on flood maps elaboration are going to be presented to broad scientific audience, e.g. climate change, land-use changes, sedimentation and erosion of river channels, etc.. The automation of modelling process with specific programming languages is a great challenge in this area. The applications dealing with these problems are also welcomed at this session.

Theme F: Hydro-extremes, global changes Conveners:
  • Prof. Zbigniew W. Kundzewicz, Institute for Agricultural and Forest Environment of Polish Academy of Sciences, Poland
Climate change is unabated and it affects all regions, sectors, and systems. In addition to gradual and monotonic climate change, of mostly anthropogenic origin, there is strong and largely natural, climatic variability. This session examines the entirety of impacts of climate change and variability on freshwater resources and hydrological systems. Probably these impacts are more important than impacts on any other systems. It is likely that the three classes of water-related problems – having too little, too much and too dirty water will be exacerbated in the changing climate. Particular emphasis in the session will be put on the hydrometeorological extremes related to water deficit (atmospheric, agricultural and hydrological drought) and destructive water surplus – floods and their links with climate change and variability.


Theme G: Wetlands hydrology and hydraulics Conveners: • Harm Duel, Research Manager Ecosystems and Environmental Quality, Deltares, the Netherlands • Tomasz Okruszko, Warsaw University of Life Sciences • Ellis Penning, Ecosystems and Water Quality Department, Deltares This session is focusing on restoring ecosystems and enhancing the resilience of ecosystems to changing climate through promoting natural hydrological, geomorphological, biochemical and ecological processes: nature based solutions. The session will highlight best practices in application of nature based solutions in rivers, lakes, wetlands, and marine coastal waters. These show cases will also address the benefits of nature based solutions in terms of ecosystem services. Best practices will include nature based flood defences, natural water retention and wetlands for water pollution control. Conveners are planning to organise a special issue in a selected journal on the theme of the Special Session.


Theme H: Lakes and Reservoirs Conveners: • Nils Rüther, The Norwegian University of Science and Technology, Norway • Kamal El Kadi Abderrezzak, Electricité de France (EDF), France • Giovanni De Cesare, École Polytechnique Fédérale de Lausanne, Lausanne (EPFL), Switzerland • Felix Beckers, University of Stuttgart, Germany Sedimentation reduces dam reservoir storage capacity and the benefits derived therefrom, such as flood and drought control, hydropower, water supply, irrigation, fish and wild life conservation, and recreation. In addition, the sediment imbalance throughout the water system caused by dams operated without sediment management facilities may lead to significant infrastructure and environmental damages both upstream and downstream of the reservoir. This session encourages submissions of works related to understanding sediment transport processes within reservoirs and developing effective strategies to counter sedimentation. We welcome submissions that include laboratory, numerical, and field studies.

Theme H: Lakes and Reservoirs Conveners:                
  • Vitaly Ilinich, Russian State Agrarian University - Moscow / Timiryazev Academy, Russia
The role of water reservoirs in human life has increased significantly over the last century. The area of all reservoirs of the world exceeds the area of such countries as France, Spain, etc. The water areas of the reservoirs have an impact on the changes in water balance elements and climatic characteristics of the surrounding area. In same time the global and territorial climate changes cause the changes in water balance elements of the water reservoirs. There are very important problems in field of safe and profitable control floods by water reservoirs: mathematical modelling of routing through spillways and the downstream of the dam; dam-break flood risk assessment; siltation of reservoirs etc. Currently, there are new technologies and experiences of their application for control water reservoirs (optimization methods, neural networks, geoinfomatic technologies, etc.) which expand the possibilities of studying and modelling processes. Any positive scientific achievement and dissemination of experience of theory and practice in this field gives an economic effect and (or) increases the safety of the population. Among possible expected outcomes: the new methods and models for river flow regulation by water reservoir which should allow to produce water reservoir control more profitably and safely and to give evaluation of the impact at environmental. So, the main directions of the session are next:
  • the interaction of water reservoirs and climate,
  • the problems of the irrigative and energetic water reservoirs,
  • flood control by water reservoirs in frames of Integrated use of the water reservoirs.


Theme I: Computational methods in hydro-environment engineering and research Conveners:                
  • Michał Szydłowski, Gdańsk University of Technology, Poland
  • Tomasz Kolerski, Gdańsk University of Technology, Poland
In hydro- and environmental engineering free surface water flows are very often observed. Such kind of water flow occurs in rivers, artificial canals, lakes, reservoirs, coastal and urban areas and many other situations in which the atmospheric pressure acts on the surface of water body. Therefore, numerous mathematical models (equations) of free surface flow are widely used in hydrology, eco-hydraulics, oceanography, coastal engineering and hydrogeology. This special session aims to provide a forum for the latest advances in modelling of free surface water flow using different models and methods. Original contributions in the following areas, though not exclusively, will be considered for presentation during this congress session: new models, methods and applications, flood inundation and routing, sediment transport and morphodynamic modeling, pollutant transport in water, irrigation and drainage modeling, numerical simulations in hydraulics and hydrology, urban water, case studies, etc. Conveners are planning to organise a special issue. The tentative journal will be one of the following: Water, Acta Geophysica.

Theme I: Computational methods in hydro-environment engineering and research Conveners:                
  • Elena Matta, TU Berlin (Technische Universität Berlin), Germany
  • Anastasia Lobanova, The Potsdam Institute for Climate Impact Research (PIK), Germany
  • Andrea Cominola, TU Berlin (Technische Universität Berlin), Einstein Center Digital Future, Germany
Machine learning (ML) applications (e.g. artificial neural networks, ANNs) are diffuse in our society and touch various sectors, such as social media, finances and security. In a world becoming more and more “digitally-friendly”, scientists have started in the last decades to explore artificial intelligence (AI) in the water-environment field as well, since they represent an attractive alternative to the hydro-numerical models mainly for their high performances and lower computational costs. In this era which faces an increasing interest on developing/applying ML techniques and data-driven models in the hydro-environmental sciences, we encourage the submission of works dealing with the investigation of such methods, alone or in combination with numerical physically-based models on the most diverse hydrological, hydraulic and environmental topics. Fields of application can be rainfall-runoff generation and prediction, forecasting of flow and water levels, estimation of evaporation/infiltration in lakes or urban areas, water balance, water quality, sensors analysis (wastewaters, flood-risk maps), decision-making for reservoir operations, water management and so on. Researchers have the chance to present innovative success cases and experiences learned by such investigations. An overview of the recent ML applications in the hydro-environment can tackle the current related challenges and inspire the next forward-steps of research, benefitting the scientific community as well as supporting smart water management solutions. Conveners are considering to organise a special issue in e.g. Advanced Engineering Informatics, Journal of Hydrology, Water (MDPI) or Acta Geogeophysika. ©2019 eInfochips (an Arrow company), all rights reserved

Theme I: Computational methods in hydro-environment engineering and research Conveners:                
  • Mike Spiliotis, Department of Civil Engineering, Democritus University of Thrace, Xanthi, Greece
  • Vlassios Hrissanthou, Department of Civil Engineering, Democritus University of Thrace, Xanthi, Greece
According to the traditional consideration, some of the major computational intelligent technologies used in hydrological modelling are the artificial neural networks, evolutionary programming, Bayesian networks, fuzzy systems and agent-based models. The computational intelligent technologies, from a classical hydrological point of view, can be seen as the set of these innovative techniques. However, more generally, “the research area of computational intelligence comprises concepts, paradigms, algorithms and implementations to develop systems that exhibit intelligent behaviour in complex environments. Typically, sub-symbolic and nature-analogous methods are adopted that tolerate incomplete, imprecise and uncertain knowledge” (Kruse et al., 2013). The computational intelligent technologies combine the computational strength of the PC together with some characteristics of the human (e.g. thinking, brain etc.). For instance, they can be applied to hydrological modelling because of the complexities (it is practically impossible to develop a white–box model for several hydrological problems) and the lack of information. Especially the black–box models and the conceptual models can be expanded by using fuzzy sets, neural networks, heuristic optimization methods etc. In addition, in water resources management problems, the heuristic optimization techniques can be very useful either because of the complexities, or due to the uncertainty of the data, or finally because of the multicriteria nature of the decision. Furthermore, the muticriteria categorization expanded by the fuzzy sets, pattern recognition and neural networks, can be used in several water resources problems such as the assessment of the vulnerability (e.g. to drought), the categorization of the basins (e.g. in relation to water scarcity) etc. Conveners are planning to organise a special issue in Journal of Hydroinformatics.


Theme J: Uncertainty, natural hazards and risks Conveners:                
  • Iacopo Carnacina, Liverpool John Moores University, the United Kingdom
  • Nicoletta Leonardi, University of Liverpool, the United Kingdom
Large scale natural hazard risk models have been used for the past 30 years to assess the risk of economic losses for the insurance and reinsurance market. These models typically offer the analysis of physical phenomena at national and often continental scales. This approach is becoming more and more popular across government and national agencies and it has been successfully extended beyond the property market. Several atmospheric perils have been classically investigated, ranging from storm surge, riverine and pluvial flooding. Being complex models, several components enter into play when estimating hazards and vulnerability. Each of these components has its inherent uncertainties and are often based on sever hypothesis, due to the large extent of areas that these generally cover. The release of new IPCC’s emissions scenarios makes this approach even more appealing for understanding risk connected with future climate projections. This special session invites contributions that explore new advances in the last generation of NATCAT models. The session is open to new computational development, optimization, analysis of various components, how these interact and affect each other and definition of uncertainties and sensitivity.

Theme J: Uncertainty, natural hazards and risks Conveners:                
  • Reza Ahmadian, Cardiff University, United Kingdom
  • Michael Hartnett, National University of Ireland Galway, Ireland
  • Stephen Nash, National University of Ireland Galway, Ireland
  • Lei Ren, Sun Yat-sen University, China
Floods are considered as one of the most devastating natural hazards globally and their impact is expected to increase as a result of Climate Change. Flood risk modelling plays a key role in flood risk management. However, flood models have been significantly improved within the last decade due to a range of reasons, including better understanding of flood drivers-pathways-receptors and their representation in flood models, improved computing power and modelling techniques, and technological advances which have led to better representation of complex physical environments such as high resolution LiDAR data for urban environments. This special session is focused on all possible aspects of enhanced flood risk modelling including, but not limited to, high resolution urban flooding, linked flood modelling, application of technology in flood modelling such as remote sensing, enhanced representation of risk and its management, new techniques in flood modelling and future climate impacts on flood risk.


Theme K: Other Conveners: • Francisco Taveira Pinto, Faculty of Engineering of the University of Porto, Portugal • Paulo Rosa Santos, Faculty of Engineering of the University of Porto, Portugal • Tiago Fazeres Ferradosa, Faculty Engineering of the University of Porto, Portugal • Victor Ramos, Faculty of Engineering of the University of Porto, Portugal Marine Energy is as a recent topic of research and innovation widely spread across the scientific community and the renewable energy stakeholders, namely, when considering the urgent need to meet the sustainable development goals and to improve the energy mix towards an efficient adaptation to Climate Change. However, the development of Marine Energy harvesting technologies still faces numerous challenges and knowledge gaps that vary in nature and complexity. This thematic session is focused on the presentation of both research and demonstration projects regarding the development of technologies to harness MRE, namely the ones concerning to wave, tidal and wind energy. Research on hybrid-platforms is also welcomed. Presentations are encouraged to cover the following sub-topics: resource characterization; hydrodynamic modelling; device development and testing; power take-off systems and control; station keeping, moorings and foundations; technology reliability characterization; grid integration; operations and maintenance; environmental impact assessment; and the economic, social, legal and political aspects of Marine Energy Harvesting Technologies. Conveners are planning to organise a special issue based on a selection of high-quality papers presented at this special session. The tentative journal will be one of the following: Renewable Energy (Elsevier), Energy (Elsevier), Energy Conversion and Management (Elsevier), Applied Energy (Elsevier), Energies (MDPI) Journal of Marine Science and Engineering (MDPI).

Theme K: Other Convener: • Jochen Aberle, Leichtweiß-Institut für Wasserbau, Technische Universität Braunschweig The Joint Programme Hydropower within the European Energy Research Alliance (EERA) aims to facilitate a new role for hydropower as enabler for the renewable energy system by aligning and targeting research efforts in Europe. This special session is organized by the sub-programme Hydropower Structures and focuses on hydraulic structures, which are one of the backbones for the generation of hydroelectricity. Contributions are invited which address the development of novel and innovative solutions for improving the reliability, efficiency, safety, and environmental friendliness of hydropower infrastructure. This includes contributions focusing on the further development of hybrid modelling strategies, i.e. the combined application of hydraulic scale models, numerical models and field investigations make full use of the advantages of the different modelling strategies in order to minimize the uncertainties associated with the different modelling strategies.

Theme K: Other Convener: • Maciej Zalewski, European Regional Centre for Ecohydrology Polish Academy of Science • Artur Magnuszewski, Faculty of Geography and Regional Studies, University of Warsaw • Luis Chicharo, International Centre for Coastal Ecohydrology The session will provide a platform for exchange of experience between scientists engineers and NGOs, and will be an important opportunity for mutual development of synergy between ecohydrological nature based solutions and engineering society. The speakers will represent a wide range of ecohydrological perspectives towards integration of molecular biology and physiological processes to environmental processes in the context of society priorities and enhancing catchment sustainability potential.

Theme K: Other Convener: • Amparo López Jiménez, Universidad Politécnica de Valencia, Spain • Modesto Pérez-Sánchez, Universidad Politécnica de Valencia, Spain Although the sustainability concept is quite well known, it is a complex concept and it can be defined as a development that satisfies the needs of the present generation, but considering the future population needs. To do so, all systems, and particularly urban waters systems should improve their management to reach the demand’s satisfaction, but not compromising the sustainability for future generations. In this context, the interaction analysis in urban (natural and engineered) water systems are interesting and very important in any real situation. Therefore, the proposal of studies, methodologies and/or algorithms, which improve the sustainability indicators of urban water systems are interesting, in order to increase the quality of systems as well as the users’ satisfaction. In this frame, this Special Session aims to propose a collection of worthy studies that combine the aforementioned concepts dealing with: • methodologies and/or case studies concerning sustainable urban drainage • methodologies and/or case studies concerning the energy efficiency and use of resources (i.e., water, other material) • methodologies and/or case studies concerning the analysis and optimization of energy consumption in buildings and/or infrastructures • numerical/experimental studies considering the implication of the current processes in the decrease of the sustainability in our cities, related to water consumption • methodologies and/or case studies concerning the analysis of the water-energy nexus in urban environments • methodologies and/or case studies concerning water reuse or optimization of water resources in urban systems (distribution or plants) Conveners are planning to organise a special issue in Sustainability journal.

Theme K: Other Conveners:                
  • Eva Fenrich, Stuttgart University, Germany
  • David Ferras, IHE Delft Institute for Water Education, The Netherlands
  • Michael Nones, Institute of Geophysics Polish Academy of Sciences, Poland
The IAHR-EPD Committee promotes education and professional development through a wide range of activities, collecting good examples and best practices from the academic and the business sectors. During this Special Session, a variety of case studies in hydro-environment engineering and water management will be presented, such as innovative teaching methods, teaching and training 4.0, serious-games, innovative teaching laboratories and equipment. The main strengths and the opportunities for exploiting the results of good projects will be shown, but also the weakest points that should be addressed in the future will be highlighted, aiming to provide the audience with guidelines on education and professional development. Researches, practitioners and water managers working at the edge between education and practice are welcome to submit their abstract and contribute to the discussion. Conveners are planning to organise a special issue in Geoscience Communication.

Theme K: Other Conveners:                
  • Djordje Cantrak, University of Belgrade, Faculty of Mechanical Engineering, Hydraulic Machinery and Energy Systems Department, Belgrade, Serbia
  • María Clavero Gilabert, University of Granada, Andalusian Institute for Earth System Research (IISTA), Granada, Spain
Flow investigation in pumps and hydraulic turbines, as well as in their systems, still occupies the attention of numerous researchers worldwide. On the other side, open hydraulic systems investigations with complex analysis of coastal protection, forecast of the consequences of human actions in various water ecosystems, biogeochemical flows dynamics, wave agitation and resonance, etc. Measurement techniques in hydraulic machinery research, as well as experimental analysis of fluvial, marine and coastal structures have great significance for better phenomena description. Novel measurement techniques are constantly developed, while some of them suffer from the lack of adequate accuracy. It is intention to present and discuss various modern measurement techniques for in situ and laboratory measurements, as well as laboratory demonstration test rigs in hydraulic machinery and open hydraulic systems research. We hope to have fruitful discussions between academia and engineers on these topics. Some of the following topics will be discussed in this Special Session:
  • turbulence research in hydraulic machinery and systems,
  • physical modelling of wind-wave interaction,
  • novel flow measurement techniques,
  • applications of lasers in fluid flow research,
  • demonstration test rigs in hydraulic machinery research and education,
  • demonstration test rigs in the verification of the hydrodynamical and structural behaviour of a breakwater.

Theme K: Other Conveners:                
  • Mikołaj Piniewski, Warsaw University of Life Sciences, Poland
Riverine ecosystems across the globe are vulnerable to river flow alterations of different origin. Four major stressors can be distinguished: climate change, land-use change, water management (including competition for water among different users) and river regulation. Quantification of the effects of these stressors on two key riverine bio-indicators, fishes and macroinvertebrates, can be achieved through application of different types of modelling tools: process-based, catchment-scale models, eco-hydraulic models, integrated modelling frameworks, empirical/statistical models, Artificial Neural Networks, etc. This session welcomes diverse model applications, carried out at different spatial scales and in different freshwater eco-regions, focusing on the effects of flow-mediated riverine ecosystem responses due to stressors listed above.

Theme K: Other Conveners:
  • Anna Łoboda, Institute of Geophysics Polish Academy of Sciences, Poland
  • Emilia Karamuz, Institute of Geophysics Polish Academy of Sciences, Poland
Remote Sensing has become important field of research in Earth Science, having numerous applications in hydrology, e.g. flood and flood extent, rainfall, surface water level and water storage, evapotranspiration, and soil moisture. The aim of this special session is to gather researchers working on problems in water resources management to show recent advances of general interest in the use of remote sensing for hydrology. Research topics covered in this session include: • data assimilation: techniques development and applications • groundwater storage management • new approaches in fluvial geomorphology • hydrological modelling based on remote sensing data • pollution and water quality