泥沙研究2018，Vol.43Issue(1)：44-50,7.DOI:10.16239/j.cnki.0468-155x.2018.01.008
基于ε-SVR的草灌被覆坡面流阻力模型研究
Study on flow resistance coefficient model of overland covered by grass and shrub based on ε-SVR
摘要
Abstract
Overland flow resistances on grass slope and shrub slope were studied on a 20° slope by rainfall experiment.The model of overland flow resistance coefficient is established based on ε-SVR,model parameters optimized by 9-fold cross-validation and grid search algorithm.The results showed that the model tend to be higher simulation accuracy and approximation and generalization ability.The model MSE of grassland and shrub land were respectively O.028 and 0.05,the average prediction error of training sets were respectively 4.68％ and 5.39％,the average prediction error of test sets were respectively 7.35 ％ and 4.65％.The objective of this study is essential to improve the calculation methods of overland flow resistance coefficient and the prediction accuracy of erosion model.关键词
阻力系数/坡面流/ε-SVR/模型/模拟降雨Key words
resistance coefficient/overland flow/ε-SVR/model/rainfall experiment分类
农业科技引用本文复制引用
焦鹏,姚文艺,肖培青,侯欣欣..基于ε-SVR的草灌被覆坡面流阻力模型研究[J].泥沙研究,2018,43(1):44-50,7.基金项目
国家重点研发计划水资源高效开发利用重点专项(2016YFC0402402) （2016YFC0402402）
中央级公益性科研院所基本业务费专项(HKY-JBYW-2014-19) （HKY-JBYW-2014-19）
水利部黄土高原水土流失过程与控制重点实验室开放课题(201601) （201601）
