| 基于Landsat-8 OLI的岷县十里铺幅植被覆盖度多年变化与地质灾害时空分布关系 |
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| 引用本文： | 张家峰,张永军,刘德玉,蒋兴波,李保强.基于Landsat-8 OLI的岷县十里铺幅植被覆盖度多年变化与地质灾害时空分布关系[J].科学技术与工程,2023,23(24):10220-10228. |
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| 作者姓名： | 张家峰 张永军 刘德玉 蒋兴波 李保强 |
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| 作者单位： | 甘肃省地矿局第一地质矿产勘查院;甘肃省地质矿产勘查开发局;甘肃省地下水工程及地热资源重点实验室;甘肃省地质环境监测院 |
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| 基金项目： | 中国地质调查局地质调查项目(DD20190645)；甘肃省科技重大专项计划(19ZD2FA002)；甘肃省地下水工程及地热资源重点实验室开放(201909)第一作者：张家峰(1975-),男,汉族,甘肃永昌人,水工环地质高级工程师。研究方向：水工环及生态地质勘查工作。E-mail：957547202@qq.com。*通讯作者：张永军(1976-),男,汉族,甘肃榆中人,水工环地质正高级工程师。研究方向：水工环地质与地质灾害防治工作。E-mail:445880788@qq.com。 ,2,张永军3,4*,刘德玉3,4,蒋兴波3,4,李保强3,4 |
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| 摘 要： | 以岷县十里铺标准图幅为研究区，基于Landsat-8 OLI(operational land imager)遥感影像数据分析了从1990～2018 年期间的植被覆盖度多年动态变化特征以及发展趋势。将多年植被覆盖度与相近年份的地质灾害点进行空间叠加对比，分析了植被覆盖度与地质灾害发生的时空对应关系，结合植被的水文效应以及力学效应探讨了植被的抑灾及致灾作用机理。结果表明：研究区内植被先后经历了急剧退化～逐渐恢复～略微退化的发展趋势，历年发生的地质灾害点主要分布于裸地和低植被覆盖度区域。地质灾害点分布密度总体随植被覆盖度的增加而减少，呈近似负相关关系。植被并不是决定地质灾害发育的关键因素，植被的水文效应和力学效应具有抑灾和致灾作用。在研判地质灾害发生概率时应综合考虑植被覆盖度、大气降水强度、历时产渗流等特征。
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| 关 键 词： | 植被覆盖度 地质灾害 遥感数据 岷县 十里铺幅 |
| 收稿时间： | 2022/12/23 0:00:00 |
| 修稿时间： | 2023/6/7 0:00:00 |
The Relationship between Multi-Year Change of Vegetation Coverage and Spatiotemporal Distribution of Geological Hazards on Shilipu Map in Minxian County based on Landsat-8 OLI |
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| Zhang Jiafeng,Zhang Yongjun,Liu Deyu,Jiang Xingbo,Li Baoqiang.The Relationship between Multi-Year Change of Vegetation Coverage and Spatiotemporal Distribution of Geological Hazards on Shilipu Map in Minxian County based on Landsat-8 OLI[J].Science Technology and Engineering,2023,23(24):10220-10228. |
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| Authors: | Zhang Jiafeng Zhang Yongjun Liu Deyu Jiang Xingbo Li Baoqiang |
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| Institution: | The First Institute of Geology and Minerals Exploration,Gansu Provincial Bureau of Geology and Minerals Exploration and Development;China;Gansu Provincial Bureau of Geology and Mineral Exploration and Development;China;Key Laboratory of Groundwater Engineering and Geothermal Resources in Gansu Province;China;Gansu Institute of Geological Environment Monitoring;China |
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| Abstract: | Taking the Shilipu standard map of Minxian County as the research area, based on Landsat-8 operational land imager(OLI) remote sensing image data, the dynamic changes and development trends of vegetation coverage over the years from 1990 to 2018 were analyzed. The spatial overlap comparison between vegetation coverage over the years and geological disaster points in similar years was conducted, and the spatiotemporal correspondence between vegetation coverage and geological disaster occurrence was analyzed, and the mechanism of vegetation disaster-suppression and disaster-causing was discussed by combining the hydrological and mechanical effects of vegetation. The results show that the vegetation in the study area has experienced the development trend of rapid degradation, gradual recovery, and slight degradation. The geological disaster points that have occurred over the years are mainly distributed in bare land and low vegetation coverage areas. The overall distribution density of geological hazard points decreases with the increase of vegetation coverage, showing an approximate negative correlation. Vegetation is not the key factor determining the development of geological disasters, and the hydrological and mechanical effects of vegetation have inhibitory and catastrophic effects. Vegetation coverage, atmospheric precipitation intensity, duration of seepage and other characteristics should be considered comprehensively when determining the probability of geological disasters. |
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| Keywords: | vegetation coverage geologic hazard remote sensing data Minxian County Shilipu map |
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