长江下游通州沙水道和白茆沙水道演变关联性及治理建议

Evolution relationship and regulation suggestion of Tongzhousha and Baimaosha waterway in lower reach of the Yangtze River

基于通州沙水道和白茆沙水道实测水文地形资料,分析本段历史演变、近期演变过程和两水道的演变关联性。在此基础上,提出通州沙水道和白茆沙水道治理对策,就治理关键部位和治理时机进行分析。分析表明:通州沙水道河道演变对白茆沙水道的影响逐渐减小,但由于徐六泾节点段对水流的束流、导流作用尚不够充分,通州沙水道的主流变化对白茆沙水道河道演变仍存在一定的关系。对于其治理,建议尽早守护通州沙——狼山沙左缘和白茆沙沙头。

Based on the field data of Tongzhousha and Baimaosha waterway, the historic evolution, recent evolution law and the evolution relationship between Tongzhousha and Baimaosha waterway are analyzed. Suggestions on the regulation, such as regulation key parts and opportunity, are proposed. The research results indicate that the evolution influence of Tongzhousha to Baimaosha decreases gradually, but the diversion of Xuliujing is insufficient, the change of the mainstream of Tongzhousha still exists certain relationship to Baimaosha. As for the regulation, it is suggested that we shall control the left edge of Tongzhousha and Langshansha and the head of Baimaosha as soon as possible.