【摘要】 受地形地貌、地质构造、地层岩性和人类工程活动等的影响，府谷县地质灾害频发。本文以府谷县地质灾害为研究对象，通过对府谷县各乡镇(街道)的地质灾害进行统计分析，深入探讨地质灾害分布规律及其与各影响因素的耦合关系。结果表明：(1)地质灾害主要集中在765～1250 m的海拔内；(2)滑坡及崩塌多集中于坡度小于25°的范围内，地面塌陷及泥石流多集中于坡度小于15°的范围内；(3)地质灾害集中分布在年降雨量400～460 mm的区域内，且沿河流及道路呈集中带状分布；(4)易发生地质灾害的岩土体类型以层状坚硬—半坚硬砂泥岩互层碎屑岩组为主，植被覆盖度越低的地区越容易发生地质灾害；(5)人类工程活动对地质灾害影响深远，在人口密度大于100人/km~2的范围内崩塌、滑坡和泥石流占比均大于65%。研究结果可为府谷县地质灾害防治提供参考。更多还原

【Abstract】 Affected by topography, geological structure, stratigraphic lithology and human engineering activities, geological disasters occur frequently in Fugu County. Taking the geological disasters in Fugu County as the research object, the geological disasters of the townships(streets) in Fugu County were statistically analyzed, and the distribution law of geological hazards and the coupling relationship with various influencing factors were discussed in depth. The results showed that:(1) The geological disasters are mainly concentrated in the range of 765～1250 m;(2) landslide and collapse are mostly concentrated in the range of slope less than 25°, and ground collapse and debris flow are mostly concentrated in the range of slope less than 15°;(3) geological disasters are concentrated in the area of rainfall of 400～460 mm, and are distributed in a concentrated belt along rivers and roads;(4) the types of rock and soil that are prone to geological disasters are mainly layered and hard-semi-hard sand-shale interbedded clastic rock group, the degree of vegetation coverage is closely related to the distribution of geological disasters;(5) geological disasters are distributed along a certain extent along the road, and human engineering activities have far-reaching impact on geological disasters, the collapse, landslide and debris flow account for more than 65% within the range of population density greater than 100 people/km~2, respectively. The research results can provide reference for the prevention and control of geological disasters in Fugu County.更多还原