摘要
断面地形法与输沙量法为计算河段冲淤变形比较常用的方法,由于测验仪器、方法的限制及测验误差的影响,两种计算方法得到的结果常存在差异。在三峡水库库区以及大坝下游荆江河段,实地开展了长江临底悬沙、不平衡输沙测验等工作,根据观测资料,综合考虑输沙量法与断面地形法计算冲淤量的影响因素,分析了对冲淤计算影响较大的典型因素,尝试在排除干扰因素影响的前提下,给出了两种方法的计算差别。
Cross-section topographical method and sediment discharge balance method are widely adopted in the calculation of river channel scoring-deposition.Limited by measurement instruments and calculation methods,errors exist in the calculation results of the two methods.In TGP reservoir area and TGP downstream river channel,the close-to-bed suspended load and non-equilibrium sediment transport were observed.According to the observed data,the primary factors influencing the calculation of scouring-deposition by two calculation methods were analyzed and the calculation difference between the two methods was given under the premise of excluding the interference factors.
作者
彭佳
孙东坡
沈健
PENG Jia;SUN Dongpo;SHEN Jian(School of Water Conservancy of North China University of Water Resources and Electric Power,Zhengzhou 450045,China;Jingjiang Bureau of Hydrology and Water Resources Survey,Changjiang Water Resources Commission,Jingzhou 434002,China)
出处
《人民长江》
北大核心
2018年第7期30-34,共5页
Yangtze River
基金
国家重点研发计划项目(2016YFC0402305)
关键词
不平衡输沙
实地测验
典型因素
冲淤量
长江
non-equilibrium sediment transport
in-situ test
typical factors
scouring-deposition amount
Yangtze River
