长江口横沙东滩滩涂整治利用和展望

Regulation utilization and prospect of Hengsha East Shoal in the Yangtze Estuary

分析长江口、横沙东滩历史和近期演变以及利用情况。近期长江口河势总体稳定,在采取人工促淤等措施下,滩涂资源动态平衡。分析横沙东滩滩涂整治利用工程建设前后的滩涂变化,工程周边滩涂淤涨,有助于改善局部区域的自然环境。近期横沙浅滩-5 m滩涂资源有减少趋势,建议结合疏浚土利用以及保持滩涂湿地动态平衡的需求及早整治,有控制性地、分期适当圈围。

This paper firstly analyzes the historical and recent evolution of the Yangtze Estuary and Hengsha East Shoal.The Yangtze Estuary is generally stable recently and a dynamic balance is maintained for tideland resources under the application of silting-up and other solutions.This paper also analyzes the tideland changes before and after the implementation of Hengsha East Shoal regulation and utilization project.The accretion of peripheral tidal flats has contributed to improve the regional physical environment.However,the resources of-5m shallow flats at Hengsha have a decreasing trend,it is advisable to carry out regulation works early possible and build up enclosing dikes in a controlled and appropriately phased manner,combining the use of dredged sediments and the requirement of keeping dynamic balance between tidal flats and wetland.