摘要
黄河流域内蒙古段是全国重要的生态屏障,为减轻沙漠化土地的威胁,本研究以1995~2020年6期Landsat卫星遥感影像为数据源,在ENVI5.3,ArcGIS10.2支持下,通过植被覆盖度等指标,获取了黄河流域内蒙古段沙漠化土地分布数据,并采用地理探测器模型对黄河流域内蒙古段沙漠化程度空间分异特征与驱动力进行解释。结果表明:(1)在1995~2020年期间土地整体向良好方向发展,轻度、非沙漠化面积分别增加3 765.36km~2,4 927.48km~2,极重度沙漠化减少了1 853.31km~2。(2)黄河流域内蒙古段的沙漠化空间差异主要由人口密度、湿润指数、干燥度、年平均降水量决定,其因子解释力均超过25%,驱动因子间交互均呈现相互增强或非线性增强,交互解释力最强的是湿润指数和土壤,q值为0.459。
The Mongolian section of the Yellow River basin is an important ecological barrier in China. In order to reduce the threat of desertification, this study took Landsat satellite remote sensing images of 6 periods from 1995 to 2020 as data sources, supported by ENVI5.3 and ArcGIS10.2,through vegetation coverage and other indicators, the spatial distribution data of desertified land in The Mongolian segment of the Yellow River basin were obtained, and the spatial distribution characteristics and driving forces of desertified land in the Mongolian segment of the Yellow River Basin were explained by using the geographic detector model. The results showed that :(1)during 1995-2020,the land area of mild desertification increased by 3765.36 km~2,non-desertification increased by 4927.48 km~2,and extremely severe desertification decreased by 1853.31 km~2.(2)The spatial differences of desertification in the Mongolian section of the Yellow River Basin were mainly determined by population density, wetness index, dryness degree and annual average precipitation, and the explanatory power of the factors were all over 25%. The interaction between the driving factors showed mutual enhancement or nonlinear enhancement. The interaction power of the wetness index and soil was the strongest, and the Q value was 0.459.
作者
康健
杨光
韩雪莹
张雨
Kang Jian;Yang Guang;Han Xueying;Zhang Yu(College of Desert Management,Inner Mongolia Agricultural University,Hohhot 010018,China)
出处
《草学》
2022年第6期32-42,共11页
Journal of Grassland and Forage Science
基金
内蒙古自治区科技重大专项“沙地生态系统近自然修复技术研究及产业化示范”2019ZD003-2资助。
关键词
黄河流域内蒙古段
沙漠化
动态变化
地理探测器
Inner Mongolia section of the Yellow River Basin
desertification
dynamic change
geographic detector
