韩江三河坝-潮州供水枢纽段河道冲淤规律及成因分析  

Process of erosion-deposition and the cause analysis in Hanjiang River Sanhe Dam-Chaozhou Water Supply Project Section

作　　者：杨云平[1] 王建军[1] 李晓星[1] 徐俊锋[1] 王义安[1] YANG Yunping;WANG Jianjun;LI Xiaoxing;XU Junfeng;WANG Yi’an(Laboratory of Engineering Sediment,Tianjin Research Institute for Water Transport Engineering,Ministry of Transport, Tianjin 300456,China)

机构地区：[1]工程泥沙交通运输行业重点实验室//交通运输部天津水运工程科学研究所

出　　处：《中山大学学报（自然科学版）》2019年第3期40-47,共8页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：中央级公益性科研院所基本科研业务费(TKS170229);交通运输部天津水运工程科学研究院科技发展基金(KJFZJJ170101)

摘　　要：以韩江三河坝-潮州供水枢纽段为研究对象,利用2002~2017年实测地形资料,分析了河道冲淤量及强度、断面及深泓变化,基于河段区间泥沙输移平衡关系,结合河道采砂情况,确定了引起河道冲淤的主控因素。研究表明:①韩江三河坝-潮州供水枢纽段深泓整体为下切趋势,2002~2017年期间三河坝-高陂枢纽、高陂枢纽-东山枢纽及东山枢纽-潮州供水枢纽河段平均下切分别为1.92m、1.15m和5.38m;②2002~2008年期间韩江三河坝-东山枢纽河段略有淤积,2008~2017年期间为冲刷趋势,其中三河坝-高陂枢纽河段冲刷强度减小,高陂枢纽-东山枢纽河段冲刷强度增加;③2002~2017年期间东山枢纽-潮州供水枢纽河段的河道均为冲刷趋势,且冲刷强度先减小后增大;④基于河段区间泥沙输移平衡理论,结合河道采砂量,研究认为河道采砂是引起三河坝-归湖河段河床冲刷下切的主控因素。The river sediment volume and intensity, cross section and the thalweg change of Sanhe Dam-Chaozhou Water Supply Project section of the Hanjiang River were analyzed using the measured topographic data from 2002 to 2017. Based on the sediment transport balance, combined with the amount of river channel sand mining, the main controlling factors that cause the channel erosion and deposition are determined. The results are as follows: 1) The thalweg of the Hanjiang River Sanhe Dam-Chaozhou Water Supply Project section shows a downcutting trend. During the period from 2002 to 2017, the average downcutting values of the Sanhe Dam-Gaobei hydro-junction, Gaobei hydro-junction-Dongshan hydro-junction and Dongshan hydro-junction-Chaozhou Water Supply Project were 1.92 m, 1.15 m and 5.38 m, respectively. 2) Sanhe Dam-Dongshan hydro-junction had a slight deposition from 2002 to 2008 and an erosion trend from 2008 to 2017. The erosion intensity decreased in Sanhe Dam-Dongshan hydro-junction, but increased in the Gaobei-Dongshan hydro-junction. 3)During the period from 2002 to 2017, the river channel of Dongshan hydro-junction-Chaozhou Water Supply Project showed an erosion trend, and the erosion intensity decreased first and then increased. 4)Based on the theory of sediment balance in the river and in combination with the sand mining quantity, it is believed that the sand mining is the main controlling factor that causes the river bed down cutting.

关 键 词：河床冲淤 采砂活动 三河坝-州供水枢纽 韩江 

分 类 号：TV184[水利工程]