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Irrigated agriculture produces about 40% of all food and fibre on about 16% of all cropped land. As such, irrigated agriculture is a productive user of resources; both in terms of yield per cropped area and in yield per volume of water consumed. Many irrigation projects, however, use (divert or withdraw) much more water than consumed by the crop. The non-consumed fraction of the water may cause a variety of undesirable effects ranging from water-logging and salinity within the irrigated area to downstram water pollution. This book discusses all components of the water balance of an irrigated area; evapotranspiration (Ch.2), effective precipitation (Ch.3) and capillary rise from the groundwater table (Ch.4). Chapter 5 then combines all components into a water management strategy that balances actual evapotranspiration (and thus crop yield) with the groundwater balance of the irrigated area (for a substainable environment). Chapter 6 presents CRIWAR 3.0, a simulation program that combines all water balance components into a single simulation procedure. The chapter describes the use of the CRIWAR software for developing water requirement tables and other useful information based on the selected water management strategy. This version greatly expands upon the capabilities of previously published programs.

Evapotranspiration. --- Irrigation efficiency. --- Irrigation water. --- Water balance (Hydrology). --- Irrigation efficiency --- Irrigation engineering --- Irrigation water --- Water balance (Hydrology) --- Evapotranspiration --- Agriculture - General --- Agriculture --- Earth & Environmental Sciences --- Environmental aspects --- Environmental aspects. --- Consumptive use --- Balance, Water (Hydrology) --- Efficiency, Irrigation --- Life sciences. --- Water-supply. --- Agriculture. --- Environment. --- Water pollution. --- Life Sciences. --- Water Industry/Water Technologies. --- Environment, general. --- Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution. --- Water-supply --- Evaporation (Meteorology) --- Plants --- Water --- Irrigation farming --- Irrigation scheduling --- Water efficiency --- Transpiration --- Water requirements --- Environmental sciences. --- Environmental pollution. --- Chemical pollution --- Chemicals --- Contamination of environment --- Environmental pollution --- 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 --- Environmental science --- Science --- Farming --- Husbandry --- Industrial arts --- Life sciences --- Food supply --- Land use, Rural --- 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. --- Availability, Water --- Water availability --- Water resources --- Natural resources --- Public utilities --- Water resources development --- Water utilities --- Balance of nature --- Biology --- Bionomics --- Ecological processes --- Ecological science --- Ecological sciences --- Environment --- Environmental biology --- Oecology --- Environmental sciences --- Population biology --- Ecology