[1]ZHAO Chuanpu,XU Xuexuan,CHEN Tianlin,et al.Impact of Land Use Changes on the Streamflow in Guanchuanhe Watershed[J].Research of Soil and Water Conservation,2015,22(03):83-87.
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Impact of Land Use Changes on the Streamflow in Guanchuanhe Watershed
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
22
Number of periods:
2015 03
Page number:
83-87
Column:
Public date:
2015-06-28
- Title:
- Impact of Land Use Changes on the Streamflow in Guanchuanhe Watershed
- Keywords:
- Guanchuanhe Watershed; land use change; SWAT model; runoff simulation
- CLC:
- F301.24;S157.1
- DOI:
- -
- Abstract:
- Research about the response of runoff on land use/cover change(LUCC) is not only a hotspot of watershed hydrology, but also the need for assessing the effect of the National Strategy of Grain for Green. In this study, based on the nine-year (1993—2001) runoff data from May to September at Dayangying hydrological station which is located in the outlet of Guanchuanhe Watershed, parameters of the SWAT model were calibrated. Then the runoff rates in 1980 and 2000 were simulated using the the calibrated SWAT model, and the impact of land use change on the streamflow was analyzed. The results showed that the correlation coefficients and Nash-Sutcliffe’s coefficients in the period of calibration and validation were 0.85 and 0.78, 0.86 and 0.84, respectively, suggesting that SWAT model was well available for simulating flood runoff in this watershed; after the implementation of ‘Grain for Green’ in the area, compared with 1980, the area of arable land decreased while area of grassland increased greatly in 2000. Under the same climatic condition, the monthly simulated runoff in 2000 decreased compared with that of 1980, and the nine-year annual average runoff (May-September) reduction was 1.39 m3/s. The runoff tended to decrease due to vegetation restoration under the condition of same climates.
- References:
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