汉江流域中上游地区地质灾害时空分布特征及评价  

Temporal and spatial distribution characteristics and evaluation of geological disasters in the middle and upper reaches of Hanjiang River Basin

作　　者：周宁 姚苑 ZHOU Ning;YAO Yuan(Xiangyang Earthquake Precursor Monitoring Station,Xiangyang 441099,Hubei,China;College of Resources,Environment and Tourism,Hubei University of Arts and Sciences,Xiangyang 441053,Hubei,China)

机构地区：[1]襄阳市地震前兆监测台,湖北襄阳441099 [2]湖北文理学院资源环境与旅游学院,湖北襄阳441053

出　　处：《湖北农业科学》2025年第3期60-65,共6页Hubei Agricultural Sciences

基　　金：湖北省自然科学基金项目(2014CFB636)。

摘　　要：对汉江流域中上游地区地质灾害的时空分布特征进行研究,并选取地质灾害隐患点、坡度、高程、降水量及其人类活动指标,对其进行地质灾害易发性分区评价。结果表明,汉江流域中上游地区地质灾害发育类型以滑坡为主,占比为77.85%,地面沉降发育最少,仅占0.06%;2000—2021年,地质灾害发生总数和各类型地质灾害发生数年际变化不大,整体上处于波动下降趋势;汉江流域中上游地区地质灾害发育集中在陕西省南部山脉及河谷地区,区域内地质灾害发生与地形地貌等自然条件关系较大;地质灾害易发性分为4级,其中,不易发区占总面积比例最大,达42.36%,低易发区次之,占比为25.64%,中易发区占比为25.08%,高易发区占比最小,为6.92%。总体来说,汉江流域中上游地区地质灾害大部分地区发育概率较小。The temporal and spatial distribution characteristics of geological disasters in the middle and upper reaches of Hanjiang River Basin were studied,and the hidden trouble points of geological disasters,slope,elevation,precipitation and human activity indicators were selected to evaluate the susceptibility zoning.The results showed that the development type of geological disasters in the middle and upper reaches of Hanjiang River Basin was mainly landslide,accounting for 77.85%,and the development of land subsidence was the least,accounting for only 0.06%.From 2000 to 2021,the interannual changes of the total number of geological disasters and the number of various types of geological disasters were not large,and the overall trend was a fluctuating downward trend.The development of geological disasters in the middle and upper reaches of Hanjiang River Basin was mainly concentrated in the northern and southern mountains and river valleys in Shaanxi Province,and it was closely related to natural conditions such as the landform.The susceptibility of geological disasters was divided into four levels.The non-susceptible zone accounted for the largest proportion of the total area at 42.36%,followed by the low-susceptibility zone at 25.64%,the moderate-susceptibility zone at 25.08%,and the high-susceptibility zone at 6.92%.In general,the probability of geological disasters in the middle and upper reaches of Hanjiang River basin was low.

关 键 词：地质灾害 易发性 时空分布 汉江流域 中上游地区 

分 类 号：P694[天文地球—地质学]