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人为动力泥沙灾害是人类活动无意地导致地表物质侵蚀、输移、沉积过程中的渐近或超临界现象 ,它具有独特的社会学及灾害学属性。按人为驱动力形式、灾害所在地貌部位、灾害的表现形式及具体灾害现象 ,人为动力泥沙灾害系列可划分为 :流域水系、沟道坡面、河道及平原河口海岸四个泥沙灾害类 ;各灾害类包括侵蚀型、搬运型、堆积型、复杂型及关联型五种泥沙灾害型 ;共 54个灾害种。这是一种比较综合、系统的人为动力泥沙灾害类型划分。从流水地貌、泥沙运动及灾害学相结合出发 ,人为动力泥沙灾害具有以下特征 :1地理地带基础上的加剧性特征 ;2人文环境影响下的渐变性与急变性特征 ;3盲目性驱动下的无序性特征 ;4复杂性和非线性特征等。人文环境的变化是人为动力泥沙灾害产生的主要原因。只有加强管理力度 ,提高人民的环境保护意识 ,才能控制人为泥沙灾害的发生。
Man-made power Sediment disasters are asymptotic or supercritical phenomena caused by human activities inadvertently causing surface material erosion, transport and deposition. They have unique sociological and catastrophic properties. In the form of human-driven force, the part of the landscape in which the disaster is located, the manifestation of the disaster and the specific disaster phenomenon, the series of human-powered sediment disaster can be divided into four types of sediment disasters, such as river system, channel slope, river course and estuarine plain; The disasters include erosion, transport, accumulation, complex and associated five types of sediment disasters; a total of 54 disasters. This is a more comprehensive and systematic classification of human-driven type of sediment disasters. Based on the combination of flowing landform, sediment movement and catastrophism, the human-powered sediment disaster has the following features: 1 aggravating features on the basis of geography; 2 features of gradualism and rapid change under the influence of humanistic environment; 3 blindness-driven Under the chaotic features; 4 complexity and nonlinear features. Changes in the human environment is the main reason for human-caused sediment hazards. Only by strengthening management and raising people’s awareness of environmental protection can man-made sediment hazards be controlled.