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With the growing concern about groundwater resources both with respect to quantity and quality, the need for groundwater modelling tools is increasing. Although there are a number of excellent introductions to the concepts of groundwater flow and pollution transport, the student or practising engineer wishing to develop a model and do practical work on the computer finds that there is still a gap between the understanding of concepts and the ability to handle the actual computations. A great deal of groundwater modelling software for personal computers and microcomputers has appeared recent

Groundwater --- BASIC (Computer program language) --- 556.3 --- 631.432 --- 681.3*I63 --- Beginner's All-Purpose Symbolic Instruction Code (Computer program language) --- Programming languages (Electronic computers) --- Ground water --- Subterranean water --- Underground water --- Water, Underground --- Water --- Hydrogeology --- Data processing. --- Mathematical models. --- Computer programs. --- Groundwater hydrology. Geohydrology. Hydrogeology --- Groundwater. Agricultural hydrology --- Applications (Simulation and modeling) --- BASIC (Computer program language). --- 681.3*I63 Applications (Simulation and modeling) --- 631.432 Groundwater. Agricultural hydrology --- 556.3 Groundwater hydrology. Geohydrology. Hydrogeology --- Basins, Drainage --- Basins, Lake --- Basins, River --- Basins, Water (Watersheds) --- Catchment areas --- Catchment basins --- Catchments (Watersheds) --- Drainage areas --- Drainage basins --- Drainage systems (Watersheds) --- Drainages (Watersheds) --- Lake basins --- River basins --- River catchments --- River systems --- Systems, River --- Water basins (Watersheds) --- Water catchments --- Watersheds. --- Estimation theory. --- Groundwater flow --- Hydrology --- Physical geography --- Water-supply --- Measurement --- Mathematics. --- Watersheds --- #ABIB:altk --- Landforms --- Fluvial geomorphology. --- Geomorphology --- Data processing --- Mathematical models --- Computer programs --- INFORMATIQUE GEOLOGIQUE --- TECHNIQUES, METHODES D'ETUDE ET MODELES --- HYDROGEOLOGIE --- NAPPES AQUIFERES --- ETUDE SUR MODELE

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Processing Modflow is one of the most complete three-dimensional groundwater and transport simulation systems in the world. The text and the companion full-version software (PMWIN) offer a totally integrated simulation system. PMWIN comes with a professional graphical user-interface, supported models and programs and several other useful modeling tools. The graphical user-interface allow one to create and simulate models with ease and fun. It can import DXF- and raster graphics and handle models with up to 1000 stress periods, 80 layers and 250,000 cells in each model layer. The model tools include a Presentation Tool, a Result Extractor, a Field Interpolator, a Field Generator, a Water Budget Calculator and a Graphic Viewer. Book targeted at novice and experienced groundwater modelers. The typical user is working as a hydrogeological or environmental consultant, in a water company, in a regulatory agency or a university.

Groundwater flow --- Groundwater --- Computer simulation. --- Pollution --- Ground water --- Subterranean water --- Underground water --- Water, Underground --- Water --- Hydrogeology --- Geology. --- Geography. --- Hydraulic engineering. --- Environmental pollution. --- Geomorphology. --- Earth Sciences, general. --- Hydrology/Water Resources. --- Geoengineering, Foundations, Hydraulics. --- Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution. --- Chemical pollution --- Chemicals --- Contamination of environment --- Environmental pollution --- Contamination (Technology) --- Asbestos abatement --- Bioremediation --- Environmental engineering --- Environmental quality --- Factory and trade waste --- Hazardous waste site remediation --- Hazardous wastes --- In situ remediation --- Lead abatement --- Pollutants --- Refuse and refuse disposal --- Engineering, Hydraulic --- Engineering --- Fluid mechanics --- Hydraulics --- Shore protection --- Cosmography --- Earth sciences --- World history --- Geognosy --- Geoscience --- Natural history --- Environmental aspects --- Earth sciences. --- Hydrology. --- Engineering geology. --- Engineering—Geology. --- Foundations. --- Hydraulics. --- Water pollution. --- Civil engineering --- Geology, Economic --- Aquatic sciences --- Hydrography --- Geosciences --- Environmental sciences --- Physical sciences --- Geomorphic geology --- Physiography --- Physical geography --- Landforms --- Aquatic pollution --- Fresh water --- Fresh water pollution --- Freshwater pollution --- Inland water pollution --- Lake pollution --- Lakes --- Reservoirs --- River pollution --- Rivers --- Stream pollution --- Water contamination --- Water pollutants --- Water pollution --- Waste disposal in rivers, lakes, etc. --- Flow of water --- Hydraulic engineering --- Jets --- Architecture --- Building --- Structural engineering --- Underground construction --- Caissons --- Earthwork --- Masonry --- Soil consolidation --- Soil mechanics --- Walls --- Geology --- Flow --- Distribution --- Details

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Over-pumping of aquifers is a worldwide problem, mainly caused by agricultural water use. Among its consequences are the falling dry of streams and wetlands, soil subsidence, die-off of phreatophytic vegetation, saline water intrusion, increased pumping cost and loss of storage needed for drought relief. Stopping or reversing the trend requires management interventions. The North China Plain serves as an example. A management system is set up for a typical county. It contains three components: monitoring, decision support based on modelling, and implementation in the field. Besides all monitoring data, the decision support module contains an irrigation calculator, a box model, and a distributed groundwater model to project the outcomes of different water allocation scenarios. In view of grain security, a solution combines an adaptation of the cropping system with imports of surface water from the South. The Open Access book does not only describe the problem and the path to its solution. It also gives access to nine manuals concerning methods used. They include computer programs and the game Save the Water. The Chinese experience should be of considerable interest to other regions in the world which suffer from over-pumping of aquifers.

Hydrology & the hydrosphere --- Sustainability --- Environmental monitoring --- Analytical chemistry --- Agricultural science --- Groundwater management --- Groundwater depletion --- Groundwater modelling --- Monitoring of groundwater levels --- Pumping tests for monitoring of pumping rates of wells --- Subsidized land fallowing --- Groundwater game app --- Smart metering of pumping wells --- Smart metering of electricity consumption --- Surface water diversion --- Decision support system --- Open Access