Estimation of water productivity of wheat in Droudzan irrigation and drainage network, Fars Province, Iran

Subject Areas :

Elnaz  Noroozi ¹ (Young Researchers and Elite Club, Miyaneh Branch, Islamic Azad University, Miyaneh, Iran)
Hossein  Babazadeh ² (Water Sciecne and Engineering Department, Science and Research Branch, Islamic Azad University, Tehran, Iran)
Majid  Vazifedoust ³ (Water Engineering Department, University of Guilan, Rasht, Iran)

Received: 2017-05-09 Accepted : 2017-10-29 Published : 2017-10-23

Keywords:  agrohydrology,  irrigation managment,  simulation,  SWAP model,  water balance,

Abstract :

Irrigation management, water use efficiency determination and provision of efficient solutions for increasing of limited water resources productivity are based on accurate estimation of crop yield and actual water consumption which its exact measurment is very difficult without proper tools. In this regard, Doroudzan irrigation and drainage network of Fars Province in Iran was divided into 86 simulation units using GIS. Water balance components and crop yield were determined in each spatial unit during a 10-year period (2000-2010) using distributed SWAP model and through MATLAB software programming. There was good correlation between the observed and simulated wheat yield amounts in each simulation unit. After validating of the model, the water balance components were simulated by calibrated model and the average water productivity in the Doroudzan network was estimated. The results showed despite decrement in water use in the network, water productivity has been increased means that higher yield can be produced by water managenment. Estimating of water balance components and yield production in the network, especially in crisis situations and water deficit condition can be used for agricultural water management evaluation and finding ways to increase water use efficiency.

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