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合河(共)以上流域呈圆叶状,北、西、南三面高,东面低,且各支流呈扇状注入干流,易于洪水汇集,极易形成突发性山洪灾害。受支流分布及流域地形、暴雨中心分布、引黄、工业排污等因素影响,形成水沙异源,水沙关系紊乱。受高杆农作物等影响,右滩地不断淤积,河道逐渐变窄。在泥沙测验中,应根据水沙变化以及水体颜色气味变化加密测次,以满足测验和整编要求。
Hehe (total) over the basin was round leaves, north, west and south of three high, east low, and the fan-shaped tributaries into the mainstream, easy to flood collection, can easily form a sudden flash flood disaster. Due to the distribution of tributaries and the topography of river basins, the distribution of rainstorm centers, yellowing, and industrial emission, the water and sediment are heterogeneous, and the water and sediment are in disorder. Affected by the high bar crops, the right bank continued siltation, the river gradually narrowed. In the sediment test, it should be based on changes in water and sediment and water color and odor changes in order to meet the test and reorganization requirements.