Abstract
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.
Highlights
China is one of the most serious desertification hazard countries in the world and Northern China is a key area of desertification research, prevention and control [1]
We should consider the four factors which make up the desertification disaster risk
(1) Based on the principle of natural disaster risk and the desertification disaster formation mechanism, we have built the conceptual framework of desertification disaster risk
Summary
China is one of the most serious desertification hazard countries in the world and Northern China is a key area of desertification research, prevention and control [1]. Desertification research and control has been carried out for half a century, there is a sign that the situation is improving in parts, but the overall area is getting worse [2]. Desertification results in land degradation, lower biological production, loss of available land resources and deterioration of the ecological environment. It disturbs and affects the human survival and normal economic activities, and creates huge losses in terms of lives and property. The economic losses caused by desertification disasters costs the country more than 54.1 billion Yuan a year [3]. In-depth studies on the desertification disaster problem are imperative
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