Design Flood Estimation Methods and Application in Small Watersheds

在山洪灾害预警防治中，山丘区小流域设计洪水是其中重要环节。目前大多数山丘区溪河缺乏实测流量资料，因而根据雨量资料是推求山丘区小流域设计洪水的重要途径，同时降雨量也是山洪灾害预警防治的重要指标。本文归纳总结了山洪灾害防治中小流域设计洪水的主要计算方法，并对山洪灾害预警防治中设计洪水计算的相关问题进行了探讨和实例分析，为山洪灾害防治中小流域设计洪水提供了借鉴。 Design floods in small watersheds are important in prevention and control of mountain disaster. Since most of the small rivers in mountain areas are lack of measured flow data, the design flood of small watershed is estimated based on rainfall data. At the same time, rainfall is also an important indicator in prevention and control of mountain disaster. This paper summarizes the main design flood estimation methods in mountainous and small river reaches, and discusses the issues that need to pay attention. The study will provide a reference for the design floods in small watershed for mountain disaster prevention and control.