关键词: 汉江中下游, 调水, 影响

Abstract: Employing the data from 1969 to 1990, the authors compared the water table and streamflow after heightening the dam and transferring water to north in 2020 with those at eight sites down the Danjiangkou Reservoir.The assessment of the impacts of water transfer from the Danjiangkou Reservoir on the middle and lower reaches of the Hanjiang River,including streamflow process, water tables,navigation and irrigation water use, was done. The results indicated that the annual average water tables and streamflows down the Danjiangkou Reservoir would decrease after water transfer.The runoff process would be more even due to the decrease in flood flow and the increase in dry period flow.The duration of flood streamflow would be shortened,while the duration of dry season streamflow would be lengthened.The diverted water quantity for irrigation in four large irrigated districts would be decreased,accompanying with more serious water shortage.The navigation condition in low-flow period would be improved due to enlargine the regulating capacity of the Danjiangkou Reservoir, but the middle-flow navigation duration would be shortened.Finally,the ideas on the compensating engineering at the middle and lower reaches of the Hanjiang River were proposed.

Key words: the Hanjiang River, water transfer, effects