Assessment on the Risk of Aeolian Sand Disasters around the Lakes and Reservoirs in Sandy Lands in North China and Some Security Measures——A Case Study in a Sandy Land in Inner Mongolia
Assessment on the Risk of Aeolian Sand Disasters around the Lakes and Reservoirs in Sandy Lands in North China and Some Security Measures——A Case Study in a Sandy Land in Inner Mongolia
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作者：
Shi Pei-jun
保障沙地湖库安全，对于构建生态安全下的土地利用格局和可持续水系具有积极意义。本文以灾害系统理论为基础，对沙地湖库周边风沙灾害风险进行综合评估，制定区域灾害评价指标体系和分类标准，总结当地成灾因子（植被）模式，绘制评估图。结果表明，内蒙古沙地湖泊水库周边风沙灾害风险度为30个，占7.3%；风沙灾害轻微风险92个，占22.5%；中度风险101个，占22.5%。分别为24.7%、重度风险104个、占25.4%、严重风险37个、占9.1%、特大风险45个、占11%。提出了工程维护区、围护区和自然恢复区防治研究区湖泊水库风沙灾害的“三圈”模式。研究成果将有益于防治风沙灾害。华北湖泊水库沙害防治与环境友好型土地利用格局规划.
It has positive significance to ensure the security of lakes and reservoirs in sandy lands for constructing the land use patterns and the sustainable water system under ecological security.Based on disaster system theory,in this paper the integrated assessment on the risk of aeolian sand disasters around the lakes and reserviors in sandy lands is carried out,an asseseement map is charted by developing the regional hazard assessment index system and the classification standards and summarizing the mode of local disaster-formative factor(vegetation)—the distence between lakes and aeolian sand disasters,and an integrated assessment model is developed.On which the risk of aeolian sand disasters around the lakes and reservoirs in sandy lands in Inner Mongolia is assessed.The results show that 30 lakes and reserviors are safe and occupy 7.3% of the total;92 are in slight risk of aeolian sand disaster and occupy 22.5%;101 are in moderate risk and occupy 24.7%;104 are in heavy risk and occupy 25.4%;37 are in serious risk and occupy 9.1%;and 45 are in extremely serious risk and occupy 11%,respectively.The "three circle" mode,i.e.the engineering maintenance zone,enclosure zone and natural restoration zone,is put forward for preventing and controlling aeolian sand disasters around the lakes and reservoirs in the study area.The research results will be beneficial to combatting aeolian sand disasters around the lakes and reserviors in north China and programming the entironment-friendly land use patterns.