运用遥感卫星照片分析黄河河口近期演变

Analysis of Recent Evolution of the Yellow River Estuary by landsat images

本文在收集多时相卫星照片的基础上，分析了黄河口地区近期（１９７６－１９９２年）清水沟流路、沙嘴及其附件海岸线的演变情况，初步探讨了水来沙与沙嘴演变之间的相互关系，以及沙嘴淤进、蚀退幅度对附近海岸线的影响情况，此外，对黄河海港及钓口河流路断流之后的海岸线变化进行了定性分析。

According to the multi-seasonal landsat images from 1976 to 1992. the recent evolution of flow path of Qingshuigou and deformation of spit and coastline around the Yellow River Estuary are analyzed.There is a close connection between evolution of the spit and oncoming runoff and sediment load of the Yellow River Estuary. The larger the water-sediment ratio. the more the spit extension. Otherwise. the spit would be eroded. An approximate linear relationship between the sizes of extension and erosion of the spit. and epirogenetic area around the spit have been found.In the condition of no artificial training works, the spit of Diaokouhe course was eroded quikly at initial stage, but the erosion will be slowed later. While the artificial training works are constructed, the coastline around Diaokouhe course and Huanghe harbor will be extened,but the rate of extension will decrease gradually.