黄土边坡的滑塌,对水库和水土保持来说,都是不利的。因此向来被认为是一种有害的物理地质现象。但是,黄土边坡的滑塌,如果能形成聚湫,对拦泥淤地则大有好处,如果把这种技术最简单、投资最省的筑坝方法试验成功,普遍推广,对根治黄河和改变西北黄土高原的面貌,一定会起相当作用。黄土高原现在的许多天然聚湫,有的已经历时很 The slump of loess slopes is bad for reservoirs and soil and water conservation. It has therefore always been considered as a detrimental physical geologic phenomenon. However, if the slump on loess slopes can form polygamy, it will be very beneficial to silt-mud embankment. If this technique is the simplest and most investment-saving method for dam construction is successfully tested and widely popularized, Change the face of the Northwest Loess Plateau will certainly play a considerable role. Many natural polygamy now in the Loess Plateau, some of which have lasted very late