摘要
该文根据游荡性河道形成的水沙条件、河道特性与稳定条件,论述了游荡性河道固有的比降陡,河道宽浅及窄河槽的冲淤与输沙特性。参照高村至陶城铺及东坝头至高村两段已经整治了的河槽断面形态、河段输沙能力、河道滞洪特性及滩槽冲淤特性的变化,分析了宽浅河道整治后,进入下游窄河段水沙条件可能产生的变化和上游宽河道整治带来的影响。结果表明.形成中水河槽是治河的关键。宽河道进一步整治可能会提高中等洪水的输沙能力,但不会改变小水淤槽的状况,若不改变水沙条件,二级悬河将会发展.但由于艾山以下窄河段在中水的输沙呈“多来多排”的特性,故不会造成直接危害。
Based on the incoming runoff and sediment conditions, river channel features and stability conditions for the forming of a wandering river reach, the natural features of a wandering river reach that the bed slope is great and the river channel is wide and shallow are expounded in this paper . Also, the sedimenta- tion and sediment transport characteristics of the narrow river reach are discussed. Referring the changes of channel geometries, sediment transport capacity, flood retarding in the river channel and sedimentation both in the main channel and on the floodplain in the two already trained river reaches, from Gaocun to Taochengpu and from Dongbatou to Gaocun, the possible changes of the incoming runoff and sediment for the narrow and deep river reach affected by training the wide and shallow river reaches upstream are analyzed in this paper. It is shown that the key for river training is to form the medium flow channel. Intensive training in the wide river reach can enlarge the sediment transport capacity of medium flows, but ishelpless for the low flows. As the result, the second stage suspended river will be in development if the incoming runoff and sediment couditions are not changed. Since the sediment transport capacity of mediumflows in the narrow and deep river reaches downstream of Aishan is characterized as 'the more sediment comes, the more will be discharged downstream', there will be not directly danger for this reach.
出处
《人民黄河》
CAS
北大核心
1992年第2期48-55,61-62,共8页
Yellow River
