Volume 7, Issue 4 (2019)                   IQBQ 2019, 7(4): 233-244 | Back to browse issues page

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zafarshademan F, Ajorlo M, Dahmardeh Ghaleno M, Ebrahimian M. Effect of Land Use Change on Water Balance Components of Gharib Abad Watershed, Sistan and Baluchestan Province. IQBQ. 2019; 7 (4) :233-244
URL: http://journals.modares.ac.ir/article-24-32213-en.html
1- Rangeland & Watershed Management Department, Soil & Water Faculty, University of Zabol, Iran , shademanf@yahoo.com
2- Rangeland & Watershed Management Department, Soil & Water Faculty, University of Zabol, Iran
Abstract:   (15 Views)
Aims: Accurate and timely estimates of the water balance are necessary for the maintenance of surface and underground waters. The purpose of the present study was to investigate effect of land use change on the water balance of Gharib Abad Watershed using the WetSpa model.
Material & Methods: The present study was carried out in Gharib Abad Watershed in Zahedan with a total area of 9924.4ha in Sistan and Baluchestan Province. Firstly, the model was implemented for the statistical period of 2008-2016 using the land use map of 2016, so that to calibrate the model, the statistical period of 2008-2012 and to validate the model the statistical period of 2012-2016 were selected. Then in order to investigate the effect of the land use change on water balance, all data and maps used in the model were maintained fixed (except for the land use map) and the model was simulated using the land use map of 2000.
Findings: In the land use of 2000 from total precipitation, the evaporation rate was 69.60%. In addition, 4.13% of the total precipitation was stopped and evaporated by vegetation cover. Moreover, 26.27% have been converted to runoff. While in the land use of 2016 the evaporation increased by 9.01%, the vegetation cover decreased by 2.42%, the runoff decreased by 6.59%. Also,  and  were identified as the most sensitive parameters.
Conclusion: The WetSpa mode has well estimated the components of the water balance of watershed and has the necessary efficiency in arid areas.
 
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Received: 2019/04/22 | Accepted: 2019/12/2 | Published: 2019/12/21
* Corresponding Author Address: Zahedan- Enghelab Boulevard-Vahdat Residential Complex

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