Urban Flood Modelling and Disaster Management (WSE/HI/08B/e)

Prerequisites

Basic knowledge of hydrology and hydraulics

Learning objectives

On completion of this module the student is able to:

develop enhanced understanding of the effects of climate variability on the hydrology that affects urban areas;
understand the structure, service provided and failures of the service for urban stormwater /drainage networks; Urban Drainage Asset Management and Optimisation;
learn how to model these systems and how to apply a typical modelling product (MOUSE, MIKE11, MIKE21 and SWMM);
develop understanding of how to use the models to assess the performance of existing systems and how to design the new ones within the context of different flood risks (pluvial, fluvial, coastal and flash floods);
learn how to build safe and reliable urban drainage models and how to evaluate a system’s performance against different standards (engineering, environmental, public health, etc.).;
develop understanding of novel techniques for modelling the complex geometry and interaction between surface water (including floodplains), sub-surface flows and urban drainage infrastructure (1D and coupled 1D/2D);
learn how to produce different flood risk maps in a GIS environment and how to calculate different types of flood damages;
develop understanding of structural and non-structural flood resilience measures such as, conventional and innovative structures, early warning systems, etc.;
understand how to develop effective flood disaster management plans.

Syllabus

Application domains of Hydroinformatics: floods, urban systems and environment, R. K. Price (IHE), Z. Vojinovic (IHE) and A. Mynett (IHE)
Introduction to floods and flooding. Introduction to urban floods and urban water systems. Introduction to environmental systems.
Environmental processes and water quality, H. J. Lubberding (IHE)
Environmental processes. Water quality problems from a modelling point of view: outfalls, BOD-DO, eutrophication, toxic substances, best technical means approach, water quality objectives approach; Properties of the natural system from a modelling point of view, residence times, time scales of transport processes compared with those of water quality processes, spatial scales of phenomena, link between transport of substances and water quality processes.
Climate change and its impact on hydrology, S. Uhlenbrook (IHE)
Introduction to the effects of climate variability on the hydrology that affects urban areas, urban hydrology as a very fast rainfall-runoff process, selection of appropriate time steps in urban runoff modelling, global, regional and local climate models, development of climate change scenarios.
Introduction to uncertainty analysis, D.P. Solomatine (IHE)
Sources of uncertainty; representations of uncertainty. Methods of analysing model uncertainty: analytical, approximation-, model error-based, Bayesian, Monte-Carlo and optimal design. Parallel and cloud computing in the analysis of computationally-intensive models.
Mathematical foundation of 2D urban flood modelling, I. Popescu (IHE), S. Djordjevic (UoE)
Introduction to the basic principles of 2D modelling, solutions of the 2D shallow-water equations, schemes for dealing with high velocity flows at shallow depths, numerical issues concerning interaction between 1D and 2D flow domains, below ground and above ground flows, subcritical and supercritical flows over urban floodplains, treatment of buildings in 2D models, etc.
Urban Flood Modelling and Evaluation of Flood Risks, Z. Vojinovic (IHE), O. Mark (DHI), S. Djordjevic (UoE)
Stormwater collection systems; services provided, beneficiaries, structure and concepts of draiange networks, rainfall input, rainfall-runoff modelling, free-surface and pressurised pipe flows, LIDAR filtering of urban features, rainfall and flow measurements, instrumentation, SCADA, telemetry, weather radar, numerical weather forecasts, build-up, wash-off, surface runoff water quality modeling in pipe networks, familiarisation with MOUSE, MIKE11, MIKE21 and SWMM software, setting up 1D and 1D-2D models, calibrating and verifying models using flow survey data, calculation of flood damages (tangible, intangible, direct, indirect damages), production of flood hazard maps, , sensitivity-based flood risk attribution.
Structural and Non-structural Urban Flood Management Measures, Z. Vojinovic (IHE), O. Mark (DHI)
Sustainable structural and nonstructural urban flood management measures such as: amplification of pipe networks, open channels, detention/retention basins, on-site-detention, on-site-infiltration, on-site-retention, SUDS, stormwater sensitive urban design, asset management and multi-objective optimization of rehabilitation measures (use of computational intelligence), design and employment of early warning systems.