东江北干流江口洲段河床演变分析  

Analysis of Riverbed Evolution in the Jiangkouzhou Section of the North Main Stream of the Dongjiang River

作　　者：张沛林 Zhang Peilin(District Water Bureau of Zengcheng,Guangzhou 511300,Guangdong)

机构地区：[1]广州市增城区水务局,广东广州511300

出　　处：《陕西水利》2025年第4期152-155,共4页Shaanxi Water Resources

摘　　要：根据东江北干流江口洲段1970年代以来遥感影像和实测地形资料分析研究区的岸滩平面变化和冲淤演变特征,研究区范围从上游石湾大桥至下游江龙电厂附近。结果显示,江口洲河边滩由江心洲淤连并岸形成,并岸之后凹岸段岸线拉平,显著减小本河段河道弯曲度;上游联合排洪渠河口段岸线经整治后凹岸段与干流段岸线平顺衔接,以上岸线的变化使得江口洲所在右侧岸线整体上较1970年代更为顺直。研究区在2002年前以冲刷为主,之后由冲转淤,滩淤槽冲特征明显,江口洲段冲淤变化较为显著,近期以淤积为主。综合来看,江口洲段河道今后仍将保持淤积或冲淤平衡的态势,利于江心洲和边滩的发育。According to the remote sensing images and measured topographic data of the Jiangkouzhou section of the northern mainstream of the Dongjiang River since the 1970 s,the characteristics of beach plane change and erosion and deposition evolution in the study area were analyzed.The study area ranged from the upstream Shiwan Bridge to the downstream Jianglong Power Plant.The results show that the riverside beach of Jiangkouzhou is formed by the siltation of the central bar,and the shoreline of the concave bank is flattened after the bank is merged,which significantly reduces the bending degree of the river channel in this section.The shoreline of the estuary section of the upstream joint flood discharge channel is smoothly connected with the shoreline of the main stream after the renovation.The change of the above shoreline makes the right shoreline of the estuary more straight than that of the 1970 s.The study area was dominated by erosion before 2002,and then changed from erosion to deposition.The erosion characteristics of the beach-silt-trough were obvious.The erosion and deposition changes in the Jiangkouzhou section were more significant,and the deposition was dominated in the near future.On the whole,the river channel of Jiangkouzhou section will still maintain the trend of siltation or erosion and deposition balance in the future,which is conducive to the development of river bars and beaches.

关 键 词：增城区 东江北干流 江口洲段 遥感影像 冲淤演变 河床演变 

分 类 号：X913[环境科学与工程—安全科学]