水利水电技术（中英文）

为顺应黄河河道的演变趋势,在河环狭颈处实施人工裁弯措施,不仅可以加速河道由弯趋直的转化过程,还可以避免随机性的自然裁弯造成河势无控制的不利影响。裁弯后河道流程缩短,比降增大,河道阻力减小且水流平顺,提高了水流挟沙力。这样既可减轻大河对防洪工程的不利影响,同时又利于航运,刷深河道,加大河流泄洪能力,降低洪水位,从而改善河道防洪条件。

In order to comply with the evolution trend of the channel of the Yellow River,taking the artificial measures of cut-off on the narrow and curved river reach can not only speed up the transformation process of the river channel from the curved to more straight,but also can avoid the uncontrolled adverse impact of the randomly natural cut-off on the river regime.After the cut-off,the river flow distance can be shortened and the river gradient can be increased along with the decrease of the flow resistance and increase of the smoothenss of the flow,and then the sediment-bearing capacity can be enhanced as well.In this way,the adverse impact from the river on the flood control works can be alleviated,that is favorable to river navigation,deepening of river bed,increase of flood discharge capacity and lowering of water level,sequentially,to improve the flood control conditions of the river channel.