【摘要】 本文给出了复合型泥沙灾害的定义,从时间序列角度出发,表述了复合型泥沙灾害过程的复杂性、周期性、耦合性及层次性等特征,并对泥沙灾害的区域关联性与区域差异,区域划分与分区特征作了研究。根据复合泥沙灾害过程发育的大环境及基本复合过程进行划分,分为东部平原-沿海地带复合泥沙灾害过程地区、中部高平原低山复合泥沙灾害过程地区、西北干旱高中山盆地复合泥沙灾害过程地区、青藏高寒山原复合泥沙灾害过程地区4个一级区;依据泥沙灾害复合过程的相似性及差异性,划分11个复合泥沙灾害过程二级亚区。更多还原

【Abstract】 In this paper the composite sediment disaster process is def ined as a compound of sediment disasters, which are formed under a given natural condit ion and by human activities in a certain space and time span and are with inhere ntly interrelated Generally speaking, it can be divided into two main types ba sed on its forming dynamics One is naturally carried out and the other is huma n induced From time series viewpoint, it is explained that the composite sedim ent disaster has complexity, periodicity, anatomists and administrative levels The regional characteristics of composite sediment disaster process have also been studied They are relatives, differences and dividing characters Based o n principle environmental features and basic composite processes the whole country can be divided into 4 main regions of composite sediment disasters They are ( Ⅰ) the eastern China plain and coast zone, (Ⅱ) the middle China plateau and lo wer mountainous area, (Ⅲ) the north～western China arid high and middle mountai nous and huge basin area, and (Ⅳ) the QinghaiXizang Plateau and highest mount ainous area According to composite sediment similarities and differences the 1 1 sub regions has been divided as follows, Ⅰ1 Subregion of flood type of co mposite sediment disasters in the northeastern China,Ⅰ2 Subregion of floo d type of composite sediment disasters in the northern China and lower and middl e Yangtze River plain,Ⅰ3 Subregion of floodstorm tide type of composite s ediment disasters along coast in the southeastern China;Ⅱ1 Subregion of a rid watersoil lose type of composite sediment disasters on Loess Plateau, Ⅱ 2 Subregion of floodslidedebris flow type of composite sediment disasters of Sichuan, Guizhou, west Hunan and Hubei, Ⅱ3 Subregion of slidedebris fl ow type of composite sediment disasters of west Sichuan and Yunnan; Ⅲ1 Subr egion of composite sediment disasters in Inner Mongolia, Ⅲ2 Subregion of wi ndysand type of composite sediment disasters in Xinjiang and Gansu, Ⅲ3 Sub region of slidedebris flow type of composite sediment disasters in Tianshan mountain;Ⅳ1 Subregion of slidedebris flow type of composite sediment disa sters of the highest mountain in the southeastern Xizang, and Ⅳ2 Subregi on of slidedebris flow type of composite sediment disasters of high Plateau in the northwestern Xizang更多还原