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1983年3月7日下午5点30分,我国甘肃省东乡族自治县洒勒山发生了一起巨大的山地滑坡,仅3—5分钟的时间内,近6千万立方米的滑坡堆积物掩埋了果园公社的洒勒、新庄、苦树等四个生产队,伤亡278人,毁坏农田3千余亩,报废小型水库一座,实为我国北方黄土地区罕见的滑坡灾难。 洒勒山相对高差300余米,由Ⅰ、Ⅱ、Ⅲ、Ⅳ级阶地组成自然斜坡,其中Ⅳ级阶地高出河床180—200米,阶面宽300—350米,为本次滑坡产生奠定了雄厚的物质基层础 阶地物质组成可分为三部分:上部为马兰黄土(Q_3~(e01)),中部为老黄土(Q_2~(nl)),下部为第三系粘土岩夹砂砾岩(N_2)。
At 5:30 p.m. on March 7, 1983, a huge mountain landslide occurred in Sailing Mountain, Dongxiang Autonomous County, Gansu Province. Nearly 60 million cubic meters of landslides were buried in only 3-5 minutes Orchard commune sprinkler, Hsinchuang, bitter tree and other four production teams, 278 casualties, destroyed more than 3,000 acres of farmland, a small scrapped reservoirs, in fact, is a rare landslide disaster in northern China loess area. The relative elevation of Zhaleishan is more than 300 meters, which is made up of Ⅰ, Ⅱ, Ⅲ, Ⅳ terraces. Among them, Ⅳ grade terraces are 180-200 meters above the riverbed and 300-350 meters wide in order to lay the foundation for the landslide A strong material base level ground material composition can be divided into three parts: the upper Malan loess (Q_3 ~ (e01)), the middle of the old loess (Q_2 ~ (nl)), the lower part of the Tertiary clay sand conglomerate N_2).