GIS支持下的黄河口近期淤、蚀动态研究

以遥感和地理信息系统（ＧＩＳ） 技术研究了黄河口１９８６ 年５ 月至１９９６ 年１０ 月淤积与侵蚀面积的变化及其空间动态。结果显示：黄河口１９９０ 年１ 月以前以淤积为主，而１９９０ 年１ 月以后则以侵蚀为主，河口向渤海推进的速率也呈明显降低的趋势。侵蚀主要发生于河口北部和西南部，淤积的主要部位是河口嘴部及其南部。

GIS Supporting Study on Current Siltation and Erosion Dynamic Changes of Yellow River Mouth

The dynamic change of siltation and erosion from May 1986 to October 1996 of the Yellow River mouth was studied supported by remote sensing and GIS. The results are as follows: 1. The current trend of the Yellow River mouth is that siltation tends to decrease and erosion tends to increase. Before January 1990 it increased by 24.9 km 2 per year and it decreased by 2.40km 2 per year after then. The northern and southwestern parts of the Yellow River mouth are main positions of erosion and the southern and mouth part are main positions of siltation. Also, the advancing rate of river mouth getting into the sea is decreasing obviously. 2. The area of the Yellow River mouth does not continuously increase as we studied before. Attention should be paid to the erosion of this region. 3. The reason of siltation decreasing and erosion increasing is the decreasing of water and sediment in the Yellow River, which caused by increasing use of the Yellow River water as well as the water and soil conservation in the upper reaches. In addition, the climatic change is one of the reasons, too.