106 李志梅:径流曲线模型(SCS-CN)在延庆典型下垫面中的优化及应用 表 3 不同下垫面 SCS-CNP 模型率定期和验证期的评价指标 Table 3 Evaluation indicators of SCS-CNP model rate and validation period of different underlying surfaces 处理 模型类型 线性拟合方程 R2 NSE RMSE 标准 SCS-CN 模型 Q 实测=...
7 grade, 35 ° efficiency coefficient can only reach 0.56, so the single pair of parameter calibration can not improve the prediction accuracy of the model, the CN value must be considered to optimize the. (3) At the end of the CN in different gradient optimization, get the rainfall ...
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. ...
研究结果以期为黄土高原丘陵区土壤流失、水土保持、非点源污染负荷估算提供科学的理论依据。关键词:SCS-CN模型;黄土高原;参数;坡度;率定INHILLYAREAOFLOESSPLATEAUOFRUNOFFMODEL(SCS-CN)TODETERMINETHEVALUEOFCNAuthor:DaiTengfeiGradeP 君,已阅读到文档的结尾了呢~~...
7 p. 基于SCS-CN模型的沟垄微型集雨系统径流预测 10 p. 基于SCS-CN模型的紫色土坡地径流预测 6 p. 拓思路抓重点在参与海峡西岸经济区建设中加快发展 6 p. 径流曲线法在黄土区小流域地表径流预测中的初步应用 6 p. 径流曲线法在黄土区小流域地表径流预测中的初步应用 6 p. (论文)径流曲线法在黄土...
As a basic input parameter in the SCS-CN model, the curve number greatly affects the predictive value of runoff depth, and the initial abstraction ratio(位) that was assumed to be o 0.2 in the original development of SCS-CN model. When applied in the hillslope areas, few attempts have ...
根据SCS模型提供的参考值,结合西安市实际情况,确定CN值结果见表9问题补充:匿名 2013-05-23 12:21:38 Scs model provides the reference value, and Xi'an, the actual situation, to determine the results of the cn value in Table 9 匿名 2013-05-23 12:23:18 In accordance with SCS models ...
The results indicate that the determination of CN values from rainfall runoff data using the proposed two-CN system approach provides reasonable accuracy and it over performs the previous methods based on the determination of a single asymptotic CN value. Although the suggested method increases the ...
It also improved model efficiency coefficient (E) to 0.768 compared with 0.482 for traditional Ia/S value. This Ia/S-adjusted SCS-CN method appears to be better appropriate for runoff prediction in the Three Gorges Area of China.Zhi-Hua Shi and Li-Ding Chen and Nu-Fang Fang and De-Fu ...
The proposed method combines the tabulated CN value with a slope gradient, a soil moisture, and a storm duration factor. It was successfully tested using a detailed dataset coming from three runoff plots in a watershed of the Loess Plateau of China. Additionally, a sensitivity analysis indicated...