近海围垦造地水下地形和水流特性动态监测

Dynamic monitoring for underwater topography and flow characteristics formed by offshore land reclamation cultivation

结合上海浦东机场围海造田实例,阐述了在近海围垦造地过程中,如何对促淤堤体附近水下地形和水流特性进行动态监测,详细地分析了坝体附近水下地形的动态变化,为工程的正确施工和保养提供了有益的保障。在监测中,主要利用GPS-RTK配合测深仪和ADCP实时获取动态的三维坐标、流速、流向和流量,并对采集的数据采用比较法和作图法进行分析和预报。

Taking Shanghai Pudong Airport Sea Reclamation Works as an example, we elaborated how to dynamically monitor underwater topography and flow in nearby region of accelerative silted dyke in the process of offshore reclamation, and analyzed dynamic changes of underground water topography near the dyke in detail and provided support for correct construction and maintenance. In the monitoring, the GPS -RTK assisted with depth -sounder and ADCP were mainly used to measure dynamic three dimensional coordinate, the flow speed, flow direction and discharge in real time and analysis and prediction were conducted using comparison method and graph method based on the obtained data.