摘要
Abstract
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Key words
Zengcheng District/north main stream of Dongjiang River/jiangkouzhou section/remote sensing image/erosion and deposition evolution/riverbed evolution分类
安全科学
