Wang Yongfang, Zhang Jiquan, Guo Enliang, Sun Zhongyi
School of Environment, Northeast Normal University, Changchun 130117, China.
Int J Environ Res Public Health. 2015 Feb 3;12(2):1703-25. doi: 10.3390/ijerph120201703.
Desertification is a typical disaster risk event in which human settlements and living environments are destroyed. Desertification Disaster Risk Assessment can control and prevent the occurrence and development of desertification disasters and reduce their adverse influence on human society. This study presents the methodology and procedure for risk assessment and zoning of desertification disasters in Horqin Sand Land. Based on natural disaster risk theory and the desertification disaster formation mechanism, the Desertification Disaster Risk Index (DDRI) combined hazard, exposure, vulnerability and restorability factors and was developed mainly by using multi-source data and the fuzzy comprehensive evaluation method. The results showed that high risk and middle risk areas account for 28% and 23% of the study area, respectively. They are distributed with an "S" type in the study area. Low risk and very low risk areas account for 21% and 10% of the study area, respectively. They are distributed in the west-central and southwestern parts. Very high risk areas account for 18% of the study area and are distributed in the northeastern parts. The results can be used to know the desertification disaster risk level. It has important theoretical and practical significance to prevention and control of desertification in Horqin Sand Land and even in Northern China.
荒漠化是一种典型的灾害风险事件，会破坏人类聚居地和生活环境。荒漠化灾害风险评估能够控制和预防荒漠化灾害的发生与发展，并减少其对人类社会的不利影响。本研究提出了科尔沁沙地荒漠化灾害风险评估与分区的方法和流程。基于自然灾害风险理论和荒漠化灾害形成机制，荒漠化灾害风险指数（DDRI）综合了致灾因子、暴露度、脆弱性和恢复力等因素，主要通过多源数据和模糊综合评价法构建而成。结果表明，高风险区和中风险区分别占研究区域的28%和23%，在研究区域呈“S”型分布。低风险区和极低风险区分别占研究区域的21%和10%，分布在中西部和西南部地区。极高风险区占研究区域的18%，分布在东北部地区。该结果有助于了解荒漠化灾害风险水平。对科尔沁沙地乃至中国北方地区的荒漠化防治具有重要的理论和实践意义。
