Chihuahuan沙漠南缘沙漠化进展评价——以San Luis Potosi高原为例（英文）

发布时间：2017-08-21 01:34

  本文关键词：Chihuahuan沙漠南缘沙漠化进展评价——以San Luis Potosi高原为例（英文）

  更多相关文章： Landsat NDVI-NDWI ST-IO desertification re-greening vegetation

【摘要】：The aim of this study is to establish if the San Luis Potosi Plateau(SLPP), which is part of the southern edge of the Chihuahuan Desert, is generating desertification processes, indicating a progression of the desert toward the central part of Mexico. Therefore, we analyzed the temporal evolution of four environmental indicators of desertification: Normalized Difference Vegetation Index(NDVI), Normalized Difference Water Index(NDWI), Iron Oxides Index(IO) and Surface Temperature(ST). Landsat TM images are used to cover a period from 1990 to 2011. A new equation of total balance is proposed to generate an image of the overall evolution of each factor which is applied to get a probability map of desertification. The evolution of NDVI, NDWI and IO shows a behavior almost stable over the time. In contrast, the ST shows a slight increase. The outcomes of this study confirm periods of vegetation re-greening and 8.80% of the SLPP has the highest probability to develop desertification. The most affected area is the portion west of the region, and the east and south are the least affected areas. The results suggest a slight advance of the desert, although most of the area doesn't have the necessary conditions to develop desertification.
【作者单位】： Facultad
【关键词】： Landsat NDVI-NDWI ST-IO desertification re-greening vegetation
【基金】：Program for Professional Development of Professors(PRODEP)through the convention PROMEP/103.5/13/6575
【分类号】：X171.1
【正文快照】： 1 Introduction Argue that a region is developing desertification processes has a significant impact on the planning of land management policies.For that reason,it’s important to analyze if the region is showing signs of desertification.The clear identi

【相似文献】

中国重要会议论文全文数据库 前1条

1 张杰;朱玉霞;刘锐;姚新;;基于HJ-1丹江口库区水域信息遥感提取研究[A];2013中国环境科学学会学术年会论文集（第三卷）[C];2013年

中国硕士学位论文全文数据库 前1条

1 朱拉扎雅;蒙古国北部北冰洋流域NDWI时空演变及其影响因素/2005-2014/[D];内蒙古师范大学;2015年

，

本文编号：710094