雷州半岛第四纪台地区的崩岗侵蚀地貌--一种后果严重的水土流失现象

雷州半岛中段西部的第四纪台地区,水土流失十分严重,崩岗地貌在水土流失面积中所占的比例已接近２０％,对区域生产环境造成了严重的破坏,若任其发展下去,数百年后可能将侵蚀区蚀切到海平面以下,形成一条横切雷州半岛的海峡,严重威胁到区域的可持续发展。通过实地调查,分析了水土流失的发育背景,总结其发育特点,认为造成其水土流失不断加剧的原因主要是其特殊的地层结构和岩性特点以及不合理的土地利用方式。因此应高度重视

SLOPE DISINTEGRATION LANDFORM DEVELOPED IN QUARTERNARY PLATFORM AREA IN LEIZHOU PENINSULAR--A SEVERE LAND EROSION PHENOMENON

Land erosion is quite severe in the Quarternary platform area inthe western part of middle section of Leizhou peninsular, where slope disintegration land form develops extensively. The area of land and water loss in the form of slope disintegration takes about 20% of all the erosion area, which has caused severe destruction to the regional ecological environment. If this kind of erosion continues, it may take only sevelal hundred years to lower the ended area down to beneath thesea level and form a new "Leizhou strait" traversing Leizhou peninsular, which will become a great menace to the sustainable development of the region. The main factors accelerating the land erosion in this area are the special stratigraphic stiucture and lithology as well as the irrational use of the land. Therefore, great attention should be paid to the land erosion in the Quarterary strata area along the coastal regions. The development and construction in such regions should be based on the full understanding of the stratigraphic lithology and the erosion factors, so the fundamental geologic research should be strengthened.