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首页> 外文会议>World Landslide Forum 3, Volume 4: Discussion Session >Characteristics and Origin of Loess Landslides on Loess Terraces at Heifangtai, Gansu Province, China
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Characteristics and Origin of Loess Landslides on Loess Terraces at Heifangtai, Gansu Province, China

机译：甘肃黑坊台黄土阶地黄土滑坡的特征与成因

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摘要

Over-irrigation can induce serious landslides on the slopes of loess terraces.Typical examples are the series of landslides happened in the last few decades on the Forth Terraces of the Yellow River at Heifangtai, Yongjing County, Gansu Province.The agricultural irrigations on the Heifangtai terraces began in 1960s.Due to the specific geological and geomorphological condition of the thick loess terraces, a great amount of irrigation water infiltrate into the loess causing serious landslide problems.The landslides at the Heifangtai can be classified into two different types based on their composition: loess landslides and loess-bedrock landslides, characterized with high-speed, long-distance sliding and low-speed, short-distance sliding respectively.Landslides caused by the over-irrigation have a special phenomenon of hysteresis development following long-term of irrigation, occurring in group and with high frequency.Most of the landslides happen in rain seasons and freeze-thaw periods.
机译：过度灌溉会在黄土阶地的斜坡上引发严重的滑坡。典型的例子是最近几十年发生在甘肃省永靖县黑坊台黄河第四阶地的一系列滑坡。黑坊台的农业灌溉梯田始于1960年代，由于黄土厚梯田的特殊地质和地貌条件，大量的灌溉水渗入黄土引起了严重的滑坡问题。黑坊台的滑坡根据其成分可分为两种类型：黄土滑坡和黄土-基岩滑坡，分别具有高速，长距离滑动和低速，短距离滑动的特点。过度灌溉引起的滑坡在长期灌溉后具有特殊的滞后现象。大部分发生在雨季和冻融期。

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