Journal of Range and Watershed Managment

Comparative Study on the Role of Land Use in Surface Runoff and Sediment Yield Using SWAT Model (A Case Syudy: Beheshtabad Watershed)

Document Type : Research Paper

Authors

Delaram Ziaei 1
Rafat Zare Bidaki
Aliasghar Besalatpour 2

1 rangeland and watershed management Department, Natural Resources and Earth Sciences Faculty, Shahrekord University/ Shahrekord, Iran

2 Soil science department, Agriculture faculty, Vali Asr University, Rafsanjan, Iran

https://doi.org/10.22059/jrwm.2019.232521.1118
Abstract
Knowing the amount of runoff and sediment generated from different lands is an important step in land use management. Since it is not always possible to measure these values, modeling parameters, will be a way to achieve watershed comprehensive management. Beheshtabad watershed in Chaharmahal & Bakhtiari province with different land uses such as range land, agriculture, gardens and urban area is an important part of Northern Karun Basin. In order to simulate the amount of runoff and sediment generated in different land uses, SWAT model was used. Discharge and sediment data of weather and hydrometric stations located in the area was used for sensitivity analyses and then to calibrate and validate model by SUFI-2 algorithm. NS and R² coefficients obtained for runoff calibration are respectively 0.69, 0.71 and for runoff validation are 0.65, 0.67 and for sediment are 0.72, 0.73 in calibration, and 0.66, 0.71 in validation, that confirmed model ability to accurately estimate of flow, runoff and sediment in the study area. The results showed that dry farming lands with average runoff and sediment of 190 mm, 24.5 tons per hectare per year respectively, has the highest and gardens with an average of 80 mm runoff has the lowest sediment yield of 1.63 tons per hectare in the year.

Keywords

Erosion
Sensitivity Analysis
Land use Management
Chaharmahal and Bakhtyari Province
Journal of Range and Watershed Managment
Volume 72, Issue 3
Autumn 2019
Pages 785-799

  • Receive Date 03 May 2017
  • Revise Date 26 December 2017
  • Accept Date 23 September 2019
  • Publish Date 22 November 2019

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