基于DEM技术的黄河口拦门沙分析

Analysis of Sandbar at Yellow River Estuary Based on DEM Technology

为了解近年来黄河口拦门沙发育情况,利用2017—2019年该区域水下地形数据,通过GIS建立DEM模型,分析区域淤积变化情况,发现黄河口拦门沙向西北和东北方向逐年发育,近口门处水下地形变化剧烈,来水来沙是形成拦门沙的主要因素。

In order to understand the development of the sandbar at the Yellow River estuary in recent years,this paper used the underwater topographic data of the area from 2017 to 2019 to build DEM model and analyze the regional sedimentation changes through GIS.It is found that the sandbar at the Yellow River mouth develops year by year to the northwest and northeast,the underwater topography near the entrance changes sharply and the incoming water and sediment are the main factors for forming the sandbar at the Yellow River estuary.