喀喇昆仑山盖孜河水文水资源特性分析

Analysis on the Hydrology and Water Resources of Gez River in Karakorum Mountain

喀喇昆仑山河流自有水文资料记载以来 ,近 10年洪灾发生频率明显高于以往 ,人民的生命财产损失程度也大幅度增加。在分析了盖孜河流域的径流及气候多年变化过程后 ,认为洪灾频发的原因是近年来流域内降水及气温呈上升趋势 ,导致高山冰川退缩 ,河流径流增加 ,洪灾增大、频率增高 ;小区域多年气候变化过程从侧面印证了我国西北地区气候由暖干向暖湿变化。

Gez River rises in Karakorum Mountain located on the western marginal zone of Taklamakan Desert, Tarim Basin, is the second largest tributary in the Kaxgar River watershed. In recent 10 years, the occurring frequency of flood disasters is higher than that in the previous years since the hydrological observation, and the loss of people's life and property increases in big amplitude. In this paper, the runoff volume and the climate change in the Gez River watershed are analyzed, it is considered that the frequent occurrence of flood disasters is mainly caused by the precipitation and temperature increase, which results in a violent melt and shrinkage of modern glaciers in the alpine zones and the increase of runoff volume. The local climate change also proves that the climate in northwest China is changing from warming-drying type to warming-wetting type.