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

编号 zgly0001584007

文献类型 期刊论文

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

作者 NOYOLA-MEDRANOCristina  MARTíNEZ-SíASValeriaAbigaíl 

作者单位 FacultaddeIngeniería/AreaCivil/Geoinformática/UniversidadAutónomadeSanLuisPotosí  ColegiodePosgraduados/CampusSanLuisPotosí 

母体文献 Journal of Geographical Sciences 

年卷期 2017年04期

年份 2017 

分类号 X171.1 

关键词 Landsat  NDVI-NDWI  ST-IO  desertification  re-greeningvegetation 

文摘内容 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.