Simulation of a Right Abshar Irrigation Network and Its Cropping Pattern Using a System Dynamics Approach
Publication: Journal of Irrigation and Drainage Engineering
Volume 140, Issue 12
Abstract
Using irrigation and drainage networks will lead to greater productivity and economic benefits. In this study, using a system dynamics approach, a computer model was developed that can estimate the crop yield of an irrigation network according to the quantity and quality of simulated irrigation water and to estimate the net profit of products. In order to calibrate and validate the model results, data collected from the research area of a right Abshar irrigation network was used. After statistical analysis and calculation of the root-mean-square error (RMSE), relative error, standard error, and correlation coefficient, the adjustment between the performance of measured and simulated network products was calculated. The value of these product indexes, according to the conditions on the network, were estimated as , 1.36%, 0.007, and 0.99, respectively. The results showed that the model in the simulated irrigation network, its cropping pattern, and the definition of other scenarios has a reasonable accuracy. But an initial check showed that the groundwater withdrawal rates from the aquifer are much higher than the recharge rate. Considering the importance of water resources, the two scenarios were defined as irrigation according to water requirement of crops and the irrigation based on limitation of exploiting groundwater resources, and the results were analyzed.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 140 • Issue 12 • December 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Sep 5, 2013
Accepted: May 7, 2014
Published online: Jun 23, 2014
Discussion open until: Nov 23, 2014
Published in print: Dec 1, 2014
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