MODIS数据在松嫩平原西部盐碱荒漠化监测中的应用
he Application of MODIS Data in the Monitoring of Alkaline Desertification in the Western Songnen Plain
以MODIS影像为信息源提取松嫩平原西部的植被指数(NDVI)，由NDVI反演得到荒漠化指数（DI），根据荒漠化指数的分级来量化研究区荒漠化分布。为进一步辩识盐碱荒漠化和沙质荒漠化，本文采取监督分类、叠置分析等多种方法和复杂步骤，借助ARCGIS软件，提取松嫩平原西部盐碱荒漠化面积。结果表明：盐碱荒漠化总面积为149.624万hm2,占总幅员面积的31.91%。其中重度荒漠化面积为14.966万hm2,中度荒漠化面积为43.274万hm2,轻度荒漠化面积为91.384万hm2。
Based on the data of MODIS, by extracting Normalized Difference Vegetation Index （NDVI）of the western Songnen plain, the thesis gained Desertification Index（DI）of the region and quantified the desertification areas of study-area according to the grading of Desertification Index（DI）. However, MODIS-NDVI data were incapable of identifying alkaline desertification (AD）and sandy desertification(SD). Applying supervised classification and overlaying analysis and other methods，MODIS image was used to interpret AD and SD and extracted area of AD . The result showed that area of AD was 149.624×104hm2, about 31.91 percent of the whole areas. The severe AD was 14.966×104hm2, the moderate AD was 43.274×104hm2, and the light AD was 91.384×104hm2.
杜关记、李海毅、汤洁、斯蔼
环境科学技术现状自然地理学灾害、灾害防治
MODIS数据 盐碱荒漠化 沙质荒漠化 松嫩平原西部
MODIS data alkaline desertification sandy desertification western Songnen plain
杜关记,李海毅,汤洁,斯蔼.MODIS数据在松嫩平原西部盐碱荒漠化监测中的应用[EB/OL].(2006-07-04)[2025-08-11].http://www.paper.edu.cn/releasepaper/content/200607-31.点此复制
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