引江济汉工程取水对航道通航条件的影响

引江济汉工程是从长江荆江河段引水至汉江兴隆段的大型输水工程，以补给汉江下游河段因南水北调中线一期工程调水而减少的水量，年平均输水量37亿m3。工程取水将会对长江中游荆江河段产生影响。以三峡175 m试验性运行期（2008年以后）作为一般水文年，根据引江济汉工程设计取水流量，通过计算工程取水所引起的长江干流河道流量及水位的变化值，分析受影响河段航道条件的变化情况。

Effect of water transfer project from the Yangtze River to the Hanjiang River on channel navigation condition

The water transfer project from the Yangtze River to the Hanjiang river is a large water transfer project from Jingjiang reach of the Yangtze River to Xinglong reach of the Hanjiang river to supply water for the lower reach of the Hanjiang river considering the reduction of water supply due to the first stage midline the project of the South-North water diversion project ,with an annual average carrying capacity of 3.7 billion m3.The water-intaking project will have an influence on the Jingjiang reach in the middle reach of the Yangtze River.Considering the Three Georges project 175 m trial run period (after 2008) as a general hydrological year and according to the design water-intaking volume fo the water transfer project from the Yangtze River to the Hanjiang river,we calculate the change of the flow and water level of the main river channel of the Yangtze River caused by the intake works and analyze the variation of channel condition in the affected reach.