摘要
流域山洪灾害成因机制分析与防治对区域经济可持续发展极其重要。从灾害系统的致灾因子、孕灾环境、承灾体等3方面分析探讨湘水流域山洪灾害的成因机制,主要结论是:下垫面因素对湘水流域山丘区洪灾的产生频率和强度有极大的影响,承灾体对灾害的形成有放大或缩小的作用。对流域山洪灾害实施防灾减灾首先需从下垫面因素着手采取措施;其次从承灾体本身着手,降低脆弱度,缩小洪水灾害对自身造成的损失。根据流域内地形、地貌、水文等自然条件及经济发展状况,湘水流域防灾减灾的主要措施有:加快坡地的改造、清扫河道,在河道边培植护岸林、加强承灾体自身的承灾能力。
It is very important for the region sustainable development to study the cause and prevention of mountain Torrent Disaster in the basin. The paper analyzed the cause of the disaster by the hazard system that contains hazard-cause factor, hazard-gestate environment, and hazard-suffer object. The results are： the hazard-gestate en- vironment is related to the disaster＇s frequency and intensity, and the hazard-suffer object＇s nature can magnify and reduce the disaster＇s effect. To prevent a disaster, firstly it should take countermeasures from hazard-gestate environment part; secondly it should think about the hazard-suffer object＇s nature. To fall down the hazard-suffer contains the landform, physiognomy and the economic development condition, the paper puts forward some countermeasures to reduce the suffering, such as to quicken the sloping field reconstruct, to implantation revetment woods besides the river, to strengthen the hazard-suffer object＇ s ability to defend itself from the disaster and so on.
出处
《云南地理环境研究》
2006年第2期28-32,共5页
Yunnan Geographic Environment Research
关键词
山洪灾害
成因机制
脆弱度
湘水流域
mountain torrent disaster
cause of hazard-formative mechanism
vulnerability
Xiangjiang basin
