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Abstract
Developing a model for irrigation networks using GIS network models
Abolghasem Chehreghani
Student of Geographic Information System
K.N.T University of tehran,
Email: a241_che@yahoo.com
Mohammad Karimi
PHD student of Geographic Information System (GIS)
K.N.T University of Tehran
Email: mkarimi@kntu.ac.ir
Ahmad Seyfi
Student of Geographic Information System
K.N.T University of Tehran
Email: ahmad1359@yahoo.com
As a result of population growth and industry development, the consumption of water increases continuously. A large portion of usable water is consumed by agriculture, which requires more efficient ways for both conveyances of water and irrigation. Usually the efficiency of irrigation-water conveyance is too low, meaning that much of the water wasted before reaching the user. In this paper, we describe a model for the management of irrigation network. The model is based on network modeling capabilities of GIS. In this model, the water conveyance efficiency of every segment is calculated. Then conveyance efficiency of each canal attained and we can calculate entire conveyance efficiency in network. Having the water needs by farmers, the amount of water needed to be entered to the network is computed. Then, we can compare the whole amount of water needed to be provided with the amount obtainable from the dam discharge. These, in turn, could be used to plan and ration the consumption of water by users and to classify farms according to their priorities for irrigation in an irrigation network.
Keywords: GIS; Network; Irrigation; water; Agriculture; Analysis
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