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Zhang, Tiegang
- Study on the Influential Factors of SCS-CN Model Parameter S in the Loess Plateau Area
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Authors
Affiliations
1 Institute of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology, Xi'an 710048, CN
1 Institute of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology, Xi'an 710048, CN
Source
Nature Environment and Pollution Technology, Vol 15, No 2 (2016), Pagination: 707-714Abstract
SCS-CN method, developed by the U.S. Department of Agriculture, is simple, effective and can be used in the area having lack of rainfall process data, thus has been widely used to estimate the runoff. In this study, 213 runoff events from 9 plots at Zizhou located on the Loess Plateau area, were studied and applied to calibrate water storage capability of soil which is donated as S in the SCS-CN method. The influence factors of S parameter were then analysed. The results show that the main influence factor of S is initial abstraction Ia. The initial abstraction ratio (Ia/S) at Tuanshangou watershed is 0.03. The maximum 30-minute rainfall intensity, 5-day prior rainfall amount and soil moisture in the top 20 cm soil layer has no influence on the S parameter.Keywords
SCS-CN Model, Retention Parameter (S), Runoff, Loess Plateau Area.References
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Authors
Affiliations
1 Key Lab of Northwest Water Resources and Environment Ecology of MOE, Xi’an University of Technology, Xi’an, Shaanxi, CN
2 Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Education, Yangling, Shaanxi, 712100, CN
3 Department of Military Economy, Engineering University of CAPF, Xi’an Shaanxi, 710086, CN
1 Key Lab of Northwest Water Resources and Environment Ecology of MOE, Xi’an University of Technology, Xi’an, Shaanxi, CN
2 Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Education, Yangling, Shaanxi, 712100, CN
3 Department of Military Economy, Engineering University of CAPF, Xi’an Shaanxi, 710086, CN