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MODELING DESERTIFICATION CHANGE IN MINQIN COUNTY, CHINA

机译：中国民勤县沙漠化建模

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摘要

Monitoring environmental processes is becoming increasingly important wherever there is increasing population and economic development pressure placed on fragile environments. Remote sensing, digital image processing, and spatial analysis have proven to be useful technologies in both assessing and monitoring environmental change. In this study, they were used to assess desertification processes and change in Minqin County, China from 1988 to 1997. The results suggest that wind erosion was the dominant cause of desertification in more than half of the study area. Coupled with this were increases in salinization processes, affecting 33.62% of the land area in 1997. Overall, moderate desertification was found to be the dominant desertification grade (43.64% of total area), followed by extreme/severe desertification (26.15% of total area) in 1997. In addition, examination of landscape pattern changes indicated that desertification processes at the landscape level were becoming evident at increasing levels of fragmentation, complexity in shape, and isolation of patches. Major fluctuations in desertification type and grade were found at the fringes of oases, where an ongoing shift was taking place between cultivation, abandonment, and reclamation.
机译：无论在脆弱的环境中，人口和经济发展压力越来越大，监测环境过程都变得越来越重要。事实证明，遥感，数字图像处理和空间分析是评估和监测环境变化的有用技术。在这项研究中，他们被用于评估中国民勤县从1988年到1997年的荒漠化过程和变化。结果表明，在一半以上的研究区域中，风蚀是沙漠化的主要原因。随之而来的是盐渍化过程的增加，在1997年影响了33.62％的土地面积。总体而言，中度荒漠化是主要的荒漠化程度（占总面积的43.64％），其次是极端/严重荒漠化（占总沙漠化的26.15％）此外，对景观格局变化的研究表明，景观的荒漠化过程在破碎程度，形状复杂性和斑块隔离程度不断提高的情况下日益明显。在绿洲的边缘发现了荒漠化类型和等级的主要波动，在耕作，废弃和开垦之间发生了持续的变化。

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