Minimizing Surface Runoff by Optimizing Land Use Management

Abstract

Abstract: Predicting the impact of land use changes on the hydrological response is crucial for water resource management. In the present study, an optimization problem formulated for the Jajrood watershed, Tehran province, Iran to find out the most suitable land allocation to different land uses. The amount of surface runoff was computed using the Soil Conservation Service (SCS) method in three scenarios of 1) existent land uses 2) existent land uses with some land management and 3) standard land uses and management. Surface runoff, land use and land capability maps were provided as inputs to formulate the objective function and governing constraints in a linear optimization problem. The optimal area of land uses in each scenario was determined by simplex method, as well as, sensitivity analysis was conducted to recognize more effective land use in reducing surface runoff. Results demonstrated that the amount of surface runoff could reduce by 0.39, 36.70 and 73.03 percent in the first, second and third scenarios, respectively, in case of implementing optimal allocation of the study land uses. The results of sensitivity analysis indicated that the area of orchard and irrigated lands are the most sensitive parameters in the constraints of surface runoff minimization problem. Key words: Land use management Linear programming Optimization Surface runoff Jajrood watershe

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oai:CiteSeerX.psu:10.1.1.389.6313Last time updated on 10/22/2014

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