缺资料流域的水文断面设计流量分析计算

Analysis and Calculation of Design Discharge of Hydrological Section in the Scarce Data Basin

摘要: 缺资料流域的水文计算是目前工程项目应用中的难点。本文在对Siran沿线水文资料的收集与分析基础上，并在实地调查测量获取河道特征水位的情况下，计算桥梁设计洪峰流量。小流域洪水暴涨暴落，历时短，很少能留下明显的痕迹，往往不会引起人们的注意，故难以调查到较为可靠的历史洪水资料，且没有水文站的观测资料。采用非连续水文观测资料推算法和暴雨推理公式计算法进行流量计算，结果表明暴雨推理公式计算法较合理，研究结果可用于指导本项目的桥梁设计，为巴基斯坦印度河流域水文计算提供了参考依据。

Abstract: The hydrological calculation in the scarce data basin is very difficult at present. Based on the collection and analysis of hydrological data along Siran, and on the condition that the characteristic water level of river channel is obtained through field survey, the design peak flow of local bridge of small watershed is calculated. The flood in small watersheds has a short period of time, leaving few obvious traces, which often does not attract people’s attention. Therefore, it is difficult to investigate more reliable historical flood data, and there is no observation data from hydrological stations. The calculation method of discontinuous hydrological observation data and the rainstorm rational formula are used to design peak discharge. The results show that the rainstorm rational formula is more reasonable and suitable for the bridge design of the project. The research results can provide a reference for the hydrological calculation of Indus River Basin in Pakistan.