提高江口水库汛限水位的可行性研究

Research on Feasibility of Heightening Limiting Level of Jiangkou Reservoir During Flood Season

分别由设计洪水和实际洪水两种途径分析提高汛限水位的可行性,前者通过计算设计洪水考虑区间组成进行调洪演算求得,后者则对历年实测洪水调洪演算后作水位频率分析求得,水位频率分析中采用了皮尔逊-Ⅲ型、对数正态和多项式拟合三种线型配线,具有较好的精度。

The feasibility of heightening the limiting level of Jiangkou reservoir during flood season is analyzed through two ways. One is by means of reservoir routing with regard to design flood (including interval flood composition) to calculate the limiting level; the other is by means of reservoir routing with regard to actual flood series to calculate the occurring frequency of the limiting level. The Pearson Type-Ⅲ distribution curve, log-normal distribution curve and polynomial fitting curve are used for analysis of frequency; and good accuracy is obtained.