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Arid and semi-arid regions are defined as areas where water is at its most scarce. The hydrological regime in these areas is extreme and highly variable, and they face great pressures to deliver and manage freshwater resources. However, there is no guidance on the decision support tools that are needed to underpin flood and water resource management in arid areas. UNESCO initiated the Global network for Water and Development Information for arid lands (GWADI), and arranged a workshop of the world's leading experts to discuss these issues. This book presents chapters from contributors to the workshop, and includes case studies from the world's major arid regions to demonstrate model applications, and web links to tutorials and state of the art modelling software. This volume is a valuable reference for researchers and engineers working on the water resources of arid and semi-arid regions.

Hydrologic models --- Water-supply --- Water resources development --- Arid regions --- Management --- Hydrological modeling --- Hydrological models --- Hydrology --- Hydrology models --- Models and modelmaking --- Models

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This important monograph is based on the results of a study on the identification of conceptual lumped rainfall-runoff models for gauged and ungauged catchments. The task of model identification remains difficult despite decades of research. A detailed problem analysis and an extensive review form the basis for the development of a Matlab® modelling toolkit consisting of two components: a Rainfall-Runoff Modelling Toolbox (RRMT) and a Monte Carlo Analysis Toolbox (MCAT). These are subsequently applied to study the tasks of model identification and evaluation. A novel dynamic identifiability ap

Rain and rainfall --- Runoff --- Rain gauges. --- Pluviometers --- Gages --- Meteorological instruments --- Precipitation gauges --- Flowoff --- Melt runoff --- Meltwater runoff --- Rainfall runoff --- Run-off --- Snow cover runoff --- Snow dump runoff --- Snow melt runoff --- Snowmelt-induced runoff --- Snowmelt runoff --- Snowmelt water runoff --- Storm runoff --- Storm water runoff --- Stormwater runoff --- Water runoff, Snowmelt --- Water runoff, Storm --- Hydrologic cycle --- Rain --- Rainfall --- Precipitation (Meteorology) --- Measurement. --- Watersheds. --- Mathematical models. --- Rain and rainfall - Mathematical models. --- Runoff - Mathematical models.

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The safety assessment of a deep repository for nuclear waste poses challenging scientific and technical questions. The risks from leakage of radionuclides from the repository, including transfers to the biosphere and the food chain must be assessed. This involves complex and poorly understood interactions between groundwater, soils, plants and the atmosphere. A unique, multidisciplinary experimental and modeling program at Imperial College London has been funded by UK NIREX to develop the science and to produce modeling tools to interpret and generalize the experimental data for safety assessm

Radioactive waste disposal in the ground --- Radioactive pollution. --- Radioisotopes --- Soil pollution. --- Biosphere. --- Life (Biology) --- Planets --- Gaia hypothesis --- Geobiology --- Contamination of soil --- Soil contamination --- Pollution --- Soils --- Soil remediation --- Soil salinization --- Migration of radioisotopes --- Environmental radioactivity --- Nuclear pollution --- Radioactivity, Environmental --- Radioactive substances --- Radioecology --- Radioactive waste disposal --- Burial of radioactive wastes --- Ground radioactive waste disposal --- Underground radioactive waste disposal --- Hazardous waste sites --- Waste disposal in the ground --- Radioactive waste repositories --- Environmental aspects. --- Migration. --- Environmental aspects --- Déchets radioactifs --- Pollution radioactive. --- Isotopes radioactifs --- Sols --- Biosphère. --- Élimination dans le sol. --- Pollution. --- Déchets radioactifs --- Biosphère. --- Élimination dans le sol.