To explore the applicability of HEC-HMS and its parameter regionalization in small ungauged watersheds in hilly areas, this paper takes hydrological divisions III and IV of Henan Province as the research area. The HEC-HMS model is applied to three typical small watersheds in Luanchuan, Gaocheng and Xiahecun. On the basis of verifying the validity of the model, the regression relationships between model parameters and underlying surface characteristics are established and verified in the Zhongtang small watershed. The results show that the qualified rates of runoff depth, flood peak flow, peak occurrence time and NSE in flood simulation are higher than 75%, and the accuracy reaches the grade B level regardless of the HEC-HMS model test or the parameter regionalization method verification. In summary, the HEC-HMS model can be applied to simulate the rainfall-runoff process of small watersheds in hilly areas, and the parameter regionalization method can effectively deduce the model parameters of HEC-HMS for small ungauged watersheds in hilly areas.

为了研究HEC-HMS在丘陵地区无灌流小流域的适用性及其参数分区，以河南省第三，第四水文区为研究区域。HEC-HMS模型应用于栾川，Gao城和下阿村三个典型的小流域。在验证模型有效性的基础上，建立并验证了中塘小流域模型参数与下垫面特征之间的回归关系。结果表明，径流深度，洪水洪峰流量，洪峰出现时间和NSE的合格率在洪水模拟中，无论HEC-HMS模型测试还是参数分区方法验证，其精度均达到75％以上，且精度达到B级。综上所述，HEC-HMS模型可用于模拟丘陵地区小流域的降雨径流过程，参数区域化方法可以有效地推导出丘陵地区小型非流域小流域的HEC-HMS模型参数。