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基于PSR模型的白龙江流域景观生态安全时空变化 被引量:54
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作者 谢余初 巩杰 张玲玲 《地理科学》 CSCD 北大核心 2015年第6期790-797,共8页
以地貌灾害频发的甘肃白龙江流域为研究区,基于"压力-状态-响应"框架模型构建流域景观生态安全评价指标体系,探讨其时空变化过程及其特征。结果表明:1990~2010年间白龙江流域景观生态安全综合指数逐渐上升,中高安全等级以上... 以地貌灾害频发的甘肃白龙江流域为研究区,基于"压力-状态-响应"框架模型构建流域景观生态安全评价指标体系,探讨其时空变化过程及其特征。结果表明:1990~2010年间白龙江流域景观生态安全综合指数逐渐上升,中高安全等级以上的面积约占研究区总面积的52%。流域内低生态安全区域主要集中在舟曲-武都段白龙江两岸区域、宕昌县西北区域和迭部县北部山区,高安全区域主要集中在自然保护区、林业发展区等植被覆盖较好的区域,其分布格局与滑坡、泥石流和水土流失等地貌灾害的风险分布格局相反。 展开更多
关键词 景观生态安全 PSR模型 地貌灾害 白龙江流域
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DEBRIS FLOW & ITS DISCIPLINARY NATURE
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作者 Liu Xilin (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China) Mo Duowen (Department of Urban and Environmental Sciences, Peking University, Beijing 100871, China) 《Natural Disaster Reduction in China》 2002年第4期8-12,共5页
Due to the inadequacy of knowledge on nature of debris flow, definitions of the subject differ. A review of the study on debris flow in the past 70 years, which was represented by over 50 teaching materials of science... Due to the inadequacy of knowledge on nature of debris flow, definitions of the subject differ. A review of the study on debris flow in the past 70 years, which was represented by over 50 teaching materials of sciences/monographs in this area, may lead to the conclusion that geomorphology is the parent subject of debris flow study. With the growth of the disciplinary growing point, a new cross disciplinary subject hazard geomorphology or geomorphic catastrophology has come into being, of which debris flow is a subject matter. The article expects to stimulate more discussion and debates on debris flow so as to boost the development of its study. 展开更多
关键词 geomorphOLOGY DEBRIS FLOW geomorphic hazard
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