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PDF
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Type:
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Working Paper |
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Author:
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Kite, Geoff; Droogers, Peter; Murray-Rust, Hammond; de Voogt, Koos |
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Date:
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2001 |
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Agency:
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International Water Management Institute (IWMI), Colombo, Sri Lanka |
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Series:
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IWMI Research Report, no. 50 |
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URI:
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https://hdl.handle.net/10535/4524
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Sector:
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Water Resource & Irrigation |
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Region:
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Middle East & South Asia |
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Subject(s):
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water resources
allocation rules
water resources--models
simulations
climate change
irrigation
irrigation--models
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Abstract:
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"Hydrological models are able to simulate the natural processes involved in translating precipitation to runoff with a reasonable degree of success. When such models are extended to include the nonnatural processes such as dams, reservoirs, diversions and irrigation, then they may be used to simulate the water resources of a basin. Such a model may also be used to evaluate past water resources and to assess the effects of past management decisions. Lessons learnt from the past can be used to predict the impact of future changes in water management. Next, if we believe the model adequately describes the basin processes, we can use it with completely different sets of data to evaluate the effects of alternative conditions such as changed land use, changed climate or changed management decisions on the water resources. Finally, such a model can be used in conjunction with economic models to optimize water use within a basin under different external conditions.
"This report describes the use of a distributed hydrologic model to evaluate different data scenarios for the Gediz basin in Turkey. The study attempted to answer questions such as; what will happen to the basin water resources if a) there is a change in climate, b) it is decided that more water must be retained in the river for environmental reasons c) more water is extracted for urban and industrial use, or d) the timing and amounts of water used for irrigation are changed? The effects of such changes were evaluated in terms of their impacts on the yields of irrigated agriculture and on the volume of water discharged at the outlet of the basin."
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