根据集水面积～洪峰流量关系推求设计洪水——以文山地区为例  

Design Flood Estimation Based on Relationship of Water-collecting Area and Peak Discharge——A Case Study of Wenshan District

作　　者：胡林凯[1] 

机构地区：[1]云南省水文水资源局文山分局,云南文山663000

出　　处：《人民珠江》2017年第8期29-32,共4页Pearl River

摘　　要：大多涉河建设项目往往需要计算设计洪峰流量,根据设计洪峰流量推求设计洪水高度,据此作为确定工程项目规模的主要参数之一。对于有长系列实测径流资料的河流,根据系列资料,采用经验公式计算经验频率,以P-Ⅲ型曲线适线,便得到所需的设计洪水。对于无实测资料的地区,有多种方法推求设计洪水。本文根据文山地区12个水文站的系列水文资料,建立集水面积~洪峰流量关系,根据集水面积~洪峰流量关系,拟定出关系线公式。以拟定出的公式,用于推求无资料地区的设计洪峰流量。通过对拟定的公式进行精度评定,评定结果合格,同时通过误差分析,结果相对误差较小,表明该方法切实可行。Most fiver - related construction projects often require the calculation of peak discharge, and the estimation of design flood height which is one of the main parameters to determine the scale of project is based on design peak discharge. For the river which had- long - term measured data, we could calculate the empirical frequency by empirical formula and obtain the design flood volumewe need by P - m curve optimum line. For the river without measured data, we also had lots of methods to calculate the design flood volume. According to the data of 12 hydometris stations, this paper built the relationship of water - collecting area and peak discharge, and then studied out the relation line formula, which was used to estimate the design peak discharge in data - lacking regions. The formula was qualified after passing the accuracy assessment. Meanwhile, the error analysis showed that the relative error was rather small, that meant the method was practical and feasible.

关 键 词：设计洪峰流量 曼宁公式 相对误差 确定性系数 

分 类 号：TV122.5[水利工程—水文学及水资源]