汉江杜家台河段河势演变及对策研究

Study on Evolution of River Regime and Countermeasures for Dujiatai Reaches in Hanjiang River

河势演变关系着河道防洪安全,汉江杜家台河段自20世纪80年代以来,由于丹江口水库长期清水下泄,杜家台弯道切滩,河势发生了很大变化,滩岸崩塌、鱼咀冲刷、引渠淤积等险情直接影响着堤防及分洪工程的运用。针对汉江杜家台河段河势现状及影响,对河势演变进行了分析,提出了微调导控,遏制滩岸崩挫,恢复优良河势的工程措施,达到改善杜家台分洪工程安全运行的目的。

The river regime evolution relates to the safety of fiver flood control. Since the 80＇s last century ,great changes have taken place for the fiver regime at Dujiatai reaches of Hanjiang River because Danjiangkou Reservoir releases clean water over the years, resulting in the bank collapse, the fish mouth erosion, approach channel siltation and affecting directly the operation of dikes and flood diversion engineering. In terms of the fiver regime existing situation and impact at Dujiatai reaches of Hanjiang River, the evaluation of the river regime is analyzed and some engineering measures, such as slightly diverting and controlling, curbing the bank collapse down, recovering the fine fiver line, to improve the operation conditions of Duajiatai Diverting Project so as to realize its safe operation.