SHORT COURSES

D. Jeff Harris (United States), US Army Corps of Engineers; Bijay Panigrahi (United States), BPC Group, Inc.; Chandra S. Pathak (United States), US Army Corps of Engineers

Bijay Panigrahi (United States), BPC Group Inc.; Udai Singh (United States), CH2M Hill, Inc.

Dr. Randall T. Hanson, Ph.D.; Research Hydrologist, U.S. Geological Survey, California Water Science Center, San Diego, California, USA

Plan/Summary:

• Theory of the Farm Process (FMP) for MODFLOW
• Features of MODFLOW2005-FMP2 (MF2005-FMP2)
• Future FMP Features
• Limitations
• Selected Examples of FMP Uses
• Summary & Conclusions

Prof. Dragan Savic (United Kingdom); Josef Bicik (United Kingdom), University of Exeter; Mark Morley (United Kingdom), University of Exeter; Qi Wang (United Kingdom), University of Exeter

This seminar will introduce GANetXL/SolveXL, a single and multiple-objective optimisation add-in for Microsoft Excel. GANetXL and its commercial version, SolveXL, act as Decision Support System (DSS) generators and employ Genetic Algorithms to solve complex real-life problems from the easy to use environment of Microsoft Excel. This workshop is intended for practitioners and researchers and will illustrate on a number of practical examples how to create a DSS to solve various optimisation problems, including design, rehabilitation and operational management of water distribution systems. During the seminar the GANetXL/SolveXL optimisation add-in will be presented and distributed to participants. The key features of GANetXL/SolveXL include:

• Single and multiple-objective optimisation techniques
• Support for integration with simulation packages (e.g., EPANET)
• Suspend, resume and browse optimisation interactively
• Multiple-objective results browser
• Batch runs
• User defined constraints & penalty multipliers
• Automatic saving of population
• Backups of intermediate population
• Graphical UI
• Visualization of results and progress
• Automation using VBA code (only available in SolveXL)

Eng. Orazio Giustolisi, Ph.D.; Professor and Collaborator, Technical University of Bari, Department of Civil and Environmental Engineering, Bari, Italy

Managing an existing WDN and designing a new WDN means answering some crucial technical questions: What is the most effective pipe sizing of the new WDN? Is the system able to supply the required demand? Is the minimum pressure met? What is the level of leakages in the network? How would system capacity change in the case of a pipe interruption? How does the system run over 24 hours under normal and abnormal conditions? What is the best allocation of a limited number of isolation valves in the system?

Engineers are asked to provide reliable answers and to provide optimal management solutions to ensure investment is allocated effectively. Their analysis is required to integrate WDN hydraulic simulation, identify key network elements (e.g. valves and pipe segments) and detect topological changes under abnormal functioning scenarios. Moreover, some optimization strategies have to find out optimal design alternatives according to hydraulic and economic criteria. Although such functionalities are available in separate software applications, they are rarely integrated in a single and consistent toolbox and/or compel the user to move from a well known software environment to newer ones. This seminar is intended for practitioners and researchers and its objective is to provide some key ideas and tools for WDN analysis and design within a comprehensive and consistent framework using excel as interface. The problem of WDN hydraulic simulation will be tackled by using both a classic demand-driven approach and the most recent pressure-driven upgrades. Water leakages will be introduced in pressure-driven hydraulic simulation. The seminar will identify the association between isolation valves and pipe segments and the automatic detection of connected WDN topology, after valve shutdowns. The optimal design of pipe diameters and of a system of isolation valves in a WDN will be considered.

WDNetXL offers a complete range of MS-Excel functions to analyse a Water Distribution Network

• WDN hydraulic simulation (Steady state)
• WDN extended period hydraulic simulation (EPS)
• Automatic identification of pipe segments for any set of isolation valves
• WDN hydraulic simulation under any pipe failure scenario (Steady state and EPS)
• Optimal design of pipe diameters
• Optimal allocation of isolation valves in the network

Mohammed Seaid; School of Engineering and Computing Sciences, University of Durham, Durham, UK; Fayssal Benkhaldoun; LAGA Paris 13 Nord University France, fayssal@math.univ-paris13.fr

The aim of this contribution is to develop a unified finite volume solver for problems arising in computational hydraulics. These problems include, water flows, floods, dam-break, suspended sediments, pollutant transport, tides, flow recirculation, etc. Each phenomena of the abovementioned evolves at different time scales and in different spatial levels. Constructing a unified finite volume method able to resolve all the time and space scales is still a challenge in computational hydraulics. Our goal in this study is, therefore, to try to build a robust finite volume code ready to be provided to the user without requiring huge modifications. Here, we deal with space scales using a mesh adaptation on unstructured grids. For the time scales, an implicit-explicit time stepping scheme is formulated. The following algorithmic aspects of the code will also be discussed:

• Mesh generation;
• Approximate Riemann-problem solvers;
• Adaptation criteria;
• Solution of linear systems.

 Numerical results and applications are shown for different test examples in hydraulics..