The asymptotic method had the best Nash model efficiency. But arithmetic-mean method provided with the best correlation coefficient and acceptance rate. Compared to asymptotic method, arithmetic-mean method is simple, thus we recommend that arithmetic-mean method be used to determine the CN value. ...
(2) Through sensitivity analysis of model parameter λ, using 20 field rainfall runoff data of lambda rate, considering the influence of slope conditions, get the parameter λ under different slopes and different slope CN value of optimization, slope of 5 °, 10 °, 15 °, parameter λ 0.1...
the CN value of 24 small watersheds in Yiyuan County, and optimizing the initial loss rate 位 according to the measured rainfall and runoff data, the initial loss rate 位 suitable for the small watershed of Gaocun River is determined to be 0.13, The model efficiency coefficien...
吴艾璞，王晓燕，黄洁钰，等. 基于前期雨量和降雨历时的SCS-CN模型改进[J]. 农业工程学报，2021，37(22)：85-94.doi：10.11975/j.issn.1002-6819.2021.22.010 http://www.tcsae.org Wu Aipu, Wang Xiaoyan, Huang Jieyu, et al. Improvement of SCS-CN model based on antecedent precipitation and ...
4.College of Water Resources and Architectural Engineering，Northwest A & F University，Yangling 712100，China) Abstract: Soil Conservation Service Curve Number( SCS-CN) model developed by the US Department of Agriculture is a more commonly method of calculating runoff. The CN value in the model ...
(College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China) Abstract:The SCS—CN model is a widely used surface runoff evaluation method.It can improve the runof f forecasting ability by determining the numer ical value of the r unoff curve number(CN),which is important ...
Based on the results, the estimated runoff value on the basis of Ia= 0.2S was 26.7 times higher than the measured value, on average. There was a very low relationship between the measured and estimated runoff values (R2=0.09) and mean model error was 0.13. The Ia/S values varied from ...
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