松花江、嫩江流域降水异常对水位变化的影响

The Relationship between the Precipitation and the Water Level over Songhuajiang and Nenjiang

利用松花江、嫩江流域的气象和水文资料 ,讨论了该流域降水对水位变化的影响。结论指出 ,松花江、嫩江流域汛期水位变化与流域内的降水有密切的关系 ,1 998年夏季特大洪水主要是由嫩江流域降水异常偏多引起的 ,逐日水位变化取决于上游水位和临近流域的降水情况。

The meteorological and hydrological data in the Songhuajiang and Nenjiang area were used to discuss the effect of precipitation on the change of the water level.The conclusion is that there is a close relationship between the water level in floodwater season and the precipitation over the Songhuajiang and Nenjiang area.The severe flood in the summer of 1998 was caused by more precipitation over the Nenjiang river.The daily change of water level is closely related to the upstream water level and the precipitation over the near region.