水土保持通报2017，Vol.37Issue(2)：339-344,封3,7.DOI:10.13961/j.cnki.stbctb.2017.02.051
基于ESAI的黄土高原荒漠化风险评估
ESAI Based Assessment of Desertification Risk in Loess Plateau
摘要
Abstract
[Objective] The risk of desertification was evaluated in Loess Plateau to provide scientific basis for the restoration,construction and protection of ecological environment.[Methods] Data of landform,climate,vegetation,soil and other socio-economic data were collected.Spatialization and digitalization were conducted using GIS and remote sensing.Upon which,desertification reasons were analyzed,and evaluation indices and risk assessment model were framed based on index of environmentally sensitive areas.[Results](1) According to the bio-physical index in the framed model,under the scenario only considering natural factors as soil,climate and vegetation,25.2 ％ of Loess Plateau was determined as high desertification risk area,where desertification was worst;62.8％ and 11.5％ of Loess Plateau were determined as moderate and potential desertification risk areas;only 0.5％ was considered having no risk.(2) If both natural factors and human interference were considered,risk area changed:coverages of extreme low,low and extreme high risk levels decreased by 5.6 ％,1.1％ and 3.8 ％,respectively;whereas,coverages of lower and higher risk levels increased by 4.4％ and 4.5％.[Conclusion] (1) The ESAI model can well explain the spatial distribution pattern of desertification risk of Loess Plateau,and the degree of desertification is gradually weakened from the northwest to the southeast.(2) Human activities have upset the long-term evolved stability of the natural eco-system to some extent,and have narrowed the gap between different risk levels of desertification.关键词
荒漠化/环境敏感区指标(ESAI)/地理信息系统(GIS)/黄土高原Key words
desertification/environmental sensitive areas index(ESAI)/geographic information systems(GIS)/Loess Plateau分类
信息技术与安全科学引用本文复制引用
张建香,张多勇,刘万锋,胡爱萍,王东,胡剑桥..基于ESAI的黄土高原荒漠化风险评估[J].水土保持通报,2017,37(2):339-344,封3,7.基金项目
国家自然科学基金项目“清代同治以来黄土高原马莲河流域荒漠化风险评估与防治研究”(31460090) （31460090）
2015年甘肃省社科规划项目(YB095) （YB095）
甘肃省社科规划项目(14YB108) （14YB108）
西峰区科技局科技计划项目(XK2016-06) （XK2016-06）
庆阳市科技局青年科技基金项目(ZJ2014-08) （ZJ2014-08）
甘肃省哲学社会科学规划项目(YB093) （YB093）
