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为定性了解无资料地区的产流模拟计算时,不同降雨频率下吸收率S_r、导水率K_s和流域持水度B_0三个参数对双曲正切产流模型的影响,利用基于拉丁超立方抽样法和随机OAT法(LH-OAT)的全局敏感性分析方法分析双曲正切产流模型的参数敏感性。吕梁兴县廿里铺村的集水小流域产流计算结果表明,模型参数敏感性排序为B_0>S_r>K_s,B_0、S_r随降雨频率的减小呈减弱趋势,K_s随降雨频率的减小呈增强趋势,三个参数随降雨频率变化的速率排序为|vB_0|>|vS_r|>|vK_s|。研究成果为无资料地区的小流域产流计算提供了参考。
In order to qualitatively understand the effects of three parameters of absorption rate S_r, hydraulic conductivity K_s and water holding capacity B_0 on hyperbolic model of runoff at different rainfall frequencies, Method and global randomness OAT method (LH-OAT) were used to analyze the parameter sensitivity of the hyperbolic model. The runoff calculation results show that the sensitivity of model parameters is B_0> S_r> K_s, B_0 and S_r decrease with decreasing rainfall frequency, and K_s decreases with decreasing rainfall frequency The trend of the three parameters is as follows: | vB_0 |> | vS_r |> | vK_s | at the rate of change of rainfall frequency. The research results provide a reference for the calculation of runoff in small watershed in the non-material area.