松花江中下游造床流量分析

为了反映松花江中下游的河道特性,确定出造床流量.收集整理了松花江中下游江桥至富锦8个水文站33 a的流量、输沙率、实测大断面等项水文资料,采用平滩流量法、宽深比法、马卡维耶夫法进行造床流量的分析计算.分析结果表明:平滩流量法计算结果具有较好的可靠性,适于用来确定松花江中下游的造床流量.马卡维耶夫法难以保证计算精度,宽深比法不具有普适性,但该方法帮助验证了平滩流量法的计算结果.松花江中下游造床流量所对应的洪水频率46%左右,属于半湿润地区.研究结果为制定松花江流域的水污染治理方案提供了参考依据.

Analysis of dominant discharge on the middle and lower reaches of the Songhua River

Dominant discharge is one of the fundamental hydraulical parameters that can reflect a river’s characteristics,so it is necessary to determine dominant discharge on the middle and lower reaches of the Songhua River.Dominant discharge was calculated by analyzing the hydrological data about discharge,sediment concentration,and cross sections collected from 8 hydrological stations on the middle and lower reaches of the Songhua River.Three methods including Bankfull Discharge method,Width-To-Depth ratio method and Makovieve method,were used respectively to analyze the dominant Discharge.The analytic results show that Bankfull Discharge method has good reliability,so it is appropriate to define the Songhua River’s dominant discharge.It is difficult for Makovieve method to satisfy the accuracy of calculated results.Width-To-Depth ratio method is short of a universal applicability,but this method is helpful to test and verify the Bankfull Discharge method’s results.Since the flood frequency corresponding to the dominant discharge is about 46 percent,the Songhua River belongs to the semi-humid region.The study provides a reference for performing the water pollution control of the Songhua River.