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随着汉江水资源利用程度的提高,汉江径流特性在一定程度上发生了变化.为分析丹江口水库建设对汉江下游水文过程的影响,利用汉江丹江口水库以下的干流站点黄家港站、谷城站、襄阳站、皇庄站、沙洋站和仙桃站的实测月平均流量资料,利用Morlet小波分析法分析汉江下游水文周期的时空变化,研究表明,丹江口水库的建设导致汉江下游水文周期出现了间断现象,且除了仙桃站点以外,其他站点的水文周期于1993年左右之后消失,且越靠近丹江口水库,受影响程度越大;利用flow health软件分析汉江下游其他水文过程的时空变化,研究表明丹江口水库的建设导致汉江下游水文过程受到很大影响,尤其是连续高流量、流量季节性变化以及洪峰流量间隔受影响程度较大.同样,越靠近水库受影响程度越大.
With the improvement of utilization of water resources in the Han River, the runoff characteristics of the Hanjiang River have changed to some extent.In order to analyze the influence of Danjiangkou reservoir construction on the hydrological process in the lower reaches of the Hanjiang River, Huangjianggang Station and Gucheng Station , Xiangyang Station, Huangzhuang Station, Shayang Station and Xiantao Station, Morlet wavelet analysis was used to analyze the spatio-temporal variations of the hydrological cycle in the lower Hanjiang River. The results show that the construction of Danjiangkou Reservoir led to the discontinuity of the hydrological cycle in the lower Hanjiang River The hydrological cycle of other sites disappeared after about 1993 except for the Xiantao site, and the closer the Danjiangkou reservoir, the greater the impact was. The analysis of spatio-temporal variations of other hydrological processes in the lower reaches of the Hanjiang River by using flow health software showed that the Danjiangkou Reservoir Led to a great impact on the hydrological process in the lower Hanjiang River, in particular, the continuous high flow, the seasonal change of flow and the peak flow interval were greatly affected, and the more affected the reservoir, the greater the impact.