Stream: Issues in Water Resources Management


I1. Environmental fluid mechanics - theoretical, numerical and experimental approaches
Carlo Gualtieri, Petra Amparo Lopez Jimenez, Dragutin T. Mihailovic, Nils Mole, Bert Blocken

Environmental Fluid Mechanics (EFM) is the scientific study of transport, dispersion and transformation processes in natural fluid flows on our planet Earth, from the microscale to the planetary scale. Stratification and turbulence are two essential ingredients of EFM. Stratification occurs when the density of the fluid varies spatially, as in a sea breeze where masses of warm and cold air lie next to each other or in an estuary where fresh river water flows over saline seawater. Turbulence is the term used to characterize the complex, seemingly random motions that continually result from instabilities in fluid flows. Turbulence is ubiquitous in natural fluid flows because of the large scales that these flows typically occupy. The processes studied by EFM greatly affect the quality of natural ecosystems. For this session papers reporting observational, experimental, numerical and theoretical investigations would be welcome. So the Session will be organized in two parts: theoretical and numerical aspects (Part 1) and applicative, software and experimental issues (Part 2).

This session could tentatively cover the following topics:

  • Diffusion, turbulent dispersion and mixing of environmental contaminants in natural and engineered water systems and in the atmosphere
  • Processes at the environmental interfaces in soil, atmosphere and natural waters
  • Turbulent flows
  • Nonlinear processes in environmental fluid mechanics
  • Two-phase and multiphase flows
  • Stratified flows
  • Transport of water and chemicals in the soil
  • Water quality processes in surface and sub-surface systems.

Link to full papers


I2.1 Water management and planning - models for unique institutional, economic and geographic contexts

& I2.2 Water management and planning - tools and methods for making decisions with uncertainty and complexity
both lead by Julien Harou, Andrea Castelletti, Manuel Pulido-Velazquez, Ejaz Qureshi

Water scarcity is forcing a re-evaluation of water resource planning and management strategies in many regions. New strategies for developing and managing water resource systems at regional and national scales are required given population growth, economic development, growing environmental concern and the nonstationarity of future hydrology and the hydrologic extremes. Regional water management and planning issues almost invariably require some customization of existing software tools, models and planning frameworks. In this session we look at a range of water management tools that have been customized for particular contexts. We focus on unique institutional, economic and political contexts, in addition to geographic or hydrological considerations. Hydro-economic models, trans-national resource modelling, planning under multiple sources of uncertainty including institutional uncertainty, integrated models that consider human or institutional agents, adapting to climate, land use and other changes will be covered in addition to a range of other topics. Presenters will be asked to emphasize what features of their tools, models and frameworks made them ideal to study a particular context. Are they flexible and adaptable, could such tools be ported and applied in a different context? Generally this session will seek to advance the tools, software and methods of advanced regional water resource planning and management.

Link to full papers of session I2.1

Link to full papers of session I2.2


I3. Application of scenarios to support national and international environmental policies to govern freshwater resources
Ilona Baerlund, Katri Rankinen

Mathematical modelling is currently being used in order to simulate the effect of changing environmental and socio-economic conditions on hydrology, sediment and nutrient transport and water quality. The ability of models to abstract natural and human behaviour driven processes and to look into a possible future make them useful tools for scenario applications. The aim of most scenario studies so far has been to study impacts of one driving force e.g. either of climate or land-use or socio-economic change. As these driving forces however are interconnected, scenario studies need to include all these factors jointly in order to support policy development and application. Hence this session is primarily seeking for papers that present examples of joint use of scenarios in national or international studies to estimate future development of water resources and their quality. Further, interesting features include the analysis of successful downscaling of global scenarios to regional studies and how the scale of catchment modelling affects the use of scenarios as input information. Also examples of cooperation between end users and modellers in supporting policy applications are welcome.

Link to full papers


I4. Bridging the gap - monitoring and modelling strategies for improving process knowledge and environmental management
Martin Volk, Ann van Griensven

Models are used since decades for simulating the impact of land and water management on hydrology, sediment and nutrient transport and water quality. However, they are still mostly used by scientific institutions, and not "directly" in environmental management. In addition, finding the appropriate monitoring strategy to capture hydrological and nutrient dynamics and to support the modelling procedure is still a challenge. On the other hand, new measurement techniques, remote sensing methods and models have been developed during the last years that are promising to improve this situation. Hence, this session is seeking for papers that present

  1. Innovative monitoring strategies that support both process investigation and model performance (and vice versa), and
  2. Model systems based on appropriate monitoring strategies and used in environmental management.

Both studies from experiments and experimental sites linked to relevant authorities as well as more pragmatic approaches are welcome.

Link to full papers


I5.1 Use of models for integrated management of urban water systems - Urban Wastewater Systems

I5.2 Use of models for integrated management of urban water systems - Water Supply Systems

all lead by Lluis Corominas, Joaquim Comas, Peter Vanrolleghem

The aim of this session consists in the creation of a discussion platform for researchers involved in the development and application of modelling for the integrated management of urban water systems (UWS). More specifically, the session would present the last trends in system-wide modelling (mechanistic, data-driven, etc) and the techniques used to calibrate and validate these models (Bayesian, multiobjective optimization, etc).

On the other hand, this session will highlight the importance of models in integrated management to successfully implement the Water Framework Directive (WFD), to achieve good ecological and chemical status of receiving water bodies. The WFD also highlights sustainability as an important driving force to manage UWS, whereas in the US Triple-Bottom-Line (TBL) assessments are increasingly part of decision-making in water systems. Therefore, this session also is open to presentations about new models (green house gas emission models, e.g. N2O and CH4 generated in sewer systems, wastewater treatment plans and rivers), new paradigms (e.g. ecosystem-based management) and methodologies (e.g. Life Cycle Assessment) required to address sustainability. The translation of environmental protection objectives into different types of legislative structures and norm systems (statistical effluent limit definitions) is also attracting attention.

Thus, this session will favour contributions aiming at improving the use of currently available models to solve environmental problems.

Link to full papers