Assessing desertification risk in the semi-arid highlands of central Mexico
Assessing desertification risk in the semi-arid highlands of central Mexico
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DOI：
10.1016/j.jaridenv.2015.04.006
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发表时间：
2015-09-01
影响因子：
2.7
通讯作者：
Ba, Khalidou M.
中科院分区：
文献类型：
--
作者：
Becerril-Pina, Rocio;Alberto Mastachi-Loza, Carlos;Ba, Khalidou M.
这项研究提出了一套综合指数，代表四个荒漠化因素：植被、土壤、气候和人为干扰因素。荒漠化趋势风险指数将时间序列中每个因素的平均斜率相加，从而将荒漠化风险分为四类：低、中、高和极端。该指数基于1993年至2011年的陆地卫星图像和人口数据，以及1980年至2010年的气候数据。使用组合矩阵的分析，也提出了确定在每个类别的驱动力。此外，变化矢量分析（CVA）进行评估在墨西哥中部的半干旱高地土地利用的变化。结果表明，克雷塔罗、圣卡塔里纳、科雷吉多拉、阿帕塞奥埃尔阿尔托和塞拉亚等市的半干旱地区是极端警戒区。总的来说，人类活动，如土地使用的变化和毁林，是该区域荒漠化进程的主要驱动力。根据这项研究的结果，建议使用减少影响的指标作为评估和监测荒漠化的一种低成本和易于应用的工具。(C)2015爱思唯尔有限公司版权所有。
This study presents the integration of a set of indices representing four desertification factors: vegetation, soil, climate and anthropic disruptors. The Desertification Trend Risk Index (DTRI) adds the mean slope of each factor in a time series, thereby classifying the risk of desertification according to four categories: low, medium, high and extreme. This index is based on Landsat images and population data from 1993 to 2011, as well as climatological data from 1980 to 2010. An analysis using a combination matrix is also presented to identify the driving forces in each category. In addition, a change vector analysis (CVA) is performed to evaluate changes in land use in the semi-arid highlands of central Mexico. The results show that the semi-arid areas of the municipalities of Queretaro, Santa Catarina, Corregidora, Apaseo el Alto and Celaya represent extreme alert regions. In general, anthropic activities such as changes in land use and deforestation are the primary driving forces in the desertification process in the region. Based on the results of this study, the use of the DTRI is recommended as a low-cost and easily applied tool to assess and monitor desertification. (C) 2015 Elsevier Ltd. All rights reserved.