热带地理Issue(4)：500-504,5.
珠江白鹅潭卡口河段地形演变及其影响
Topographic Evolution of Baietan Constraint Reach and its Impacts on the Water Level of the Pearl River
摘要
Abstract
Baietan constraint reach of the Pearl River in Guangzhou, located in the west of downtown, is the deepest and widest water area in the city, with Front Channel, Back Channel and the Liuxi River converging here. Owing to its distinct location and physical conditions, Baietan plays a significant role in Guangzhou urban development. This paper discusses the geologic and geomorphologic features of the constrain reach, and then analyses its watercourse topographic evolution as well as scour-and-silting alternation based on ancient terrain map and remote sensing data. The result shows that Baietan reach plays a control role in stabilizing water level of the Pearl River, and its general evolution is characterized by evident narrowing but relatively slower shoaling. The narrowing of the reach would obstruct upstream flood discharge and reduce downstream tidal prism. Therefore, for protection of the Pearl River and the safety of the city, the evolutional law of the watercourse should be followed, the open space of the neck reach be maintained, and further narrowing of the river channel be avoided.关键词
白鹅潭/珠江/卡口河段/河道演变/广州Key words
Baietan/Pearl River/constraint reach/watercourse evolution/Guangzhou分类
建筑与水利引用本文复制引用
李平日,宫清华,熊海仙..珠江白鹅潭卡口河段地形演变及其影响[J].热带地理,2014,(4):500-504,5.基金项目
国家自然科学青年基金（41201557）；广东省科技计划项目（2012A030200010）；广东省水利科技项目 （）
