چکیده مقاله
Prediction of surface runoff by semi distributed models is a challenging topic for most hydrologists because of water resource management and developing of models in accuracy of performing These days, arid and semi arid areas are being one of the critical regions for developing in contrary scarcity water; meanwhile, most of the arid and semi arid areas are potential for preserving surface waters Therefore, modeling of these regions can be useful for both, evaluation the capability the models in arid to semi arid regions and developing them due to practical application for water resource management and future planning of watersheds management In this study, SWAT model is applied for modeling of daily flow in Roodan watershed, Iran The climate of Roodan is arid to semi arid and agriculture and gardening are the main activities during the past 30 years The area of Roodan is 10570km2 andEsteghlal Minab Dam is located after the outlet of the Roodan watershed to collection of the stream flow from Roodan basin For modeling of Roodan is prepared required data digital elevation map, Land use map from pasture map, satellite image and developing statistic agriculture field Then soil layer is prepared by FAO codes, and then it is evaluated by considering the geology map and available sample soil in Roodan Finally, meteorological data are collected near 21 years from 1988 In this research three scenarios is defined for land use map due to continuously update of this layer during the 21 years 1988 1993,1994,2002,2003 2008 in modeling stream flow Then, SUFI 2 Algorithm is performed for calibration and uncertainty analysis Results showed a promising modeling in climate arid to semi arid regions of southern part of Iran Hormozgan Province Strength of calibration by P and R factors were for calibration and validation periods 50%, 0 16 calibration and 72%, 0 14 validation respectively Generally model was performed in a acceptable values of R2 coefficient correlation and NS Nash Sutcliff In this study has been tried to achieve a logical range with best solution due to modeling of Roodan by SWAT for R2 and NS, which they have been obtained in consistent values in last iteration Values of R2 and NS are resulted similarly 0 72 for calibration and 0 60 for validation period
کلیدواژهها
نویسندگان
Milad Jajarmizadeh
Department of Hydraulic and Hydrology in Universiti Teknologi Malaysia
Sobri Bin Harun
Department of Hydraulic and Hydrology in Universiti Teknologi Malaysia
Marjan Nikudel
Isfahan University of Technology
شیوه ارجاع
Jajarmizadeh, Milad and Bin Harun, Sobri and Nikudel, Marjan,1391,Modeling Daily Flow Discharge by Continuous Land- Use Update Procedure in Roodan Watershed, Iran,9th International Congress on Civil Engineering,Isfahan
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