三门峡建库前潼关河床冲淤规律分析

Analysis on scouring and silting laws of Tongguan River Bed prior to the construction of Sanman Gorge Reservoir

根据历史文物考证、地质勘探剖面资料以及水文资料分析 ,三门峡水库修建前 ,潼关河床高程处于动态相对冲淤平衡的微淤状态 ;年平均淤积厚度不足 1cm ,由于潼关河段具备有利于河段稳定的下边界条件 ,河段两岸边界对水流有约束作用 ,干支流洪水具有巨大的输沙能力 ;因此 ,建库前潼关河床能保持动态相对的冲淤平衡。对这一规律的分析 。

Based on the historical textual studies and the analysis of Tongguan river bed prior to Sanmen Gorge reservoir construction was in the micro silting state of dynamic and relative balance of scouring and silting,with an annual average silt thickness of less than 1cm. Since Tongguan river section has had the boundary conditions being favorable for river section stability,the boundary of the both banks is of great constraint functions,and flood water in the main river and its tributaries has great capacity to transport sediments so that Tongguan river bed prior to the reservoir construction is able to maintain the dynamic and relative balance of scouring and silting. The analysis on such law is favorable for further improving Sanmen Gorge Reservoir in decision making for controlling over the Yellow River.