- 责任者：Xu Zemin (Department of Civil Engineering ; Kunming University of Science and Technology ; Kunming 650224 ; China) ; Liu Wenlian
- 刊名：Quaternary Sciences
- 出版年：2013
- 卷期：33(3)
- 关键词：滑坡 ; landslides ; 堰塞湖 ; barrier lakes ; 云南 ; Yunnan Province
- 页码：p.490-500
- 图表：illus., 17 refs.
- 分类号：1400
- issnNo：ISSN1001-7410
- isbnNo：CN11-2708/P
Taking Zhaizicun giant landslides and Haikou large-scale landslide in Jinsha River and its tributary as examples, the geomorphological effects of landslide damming were preliminarily discussed by field surveying, measuring and indoor theoretical analysis. Zhaizicun giant ancient landslides possess residual landslide dams and deposits of landslide-dammed lake with a length of 55km and area of about 120km2 along Jinsha River. Severely compare to other river section, the characteristics of landslide damming section is plane bending, small gradient ratio of profile as well as wide and shallow cross-section,which manifest plain area river features. The distribution area of the deposits of landslide-dammed lake is broad,in which the geomorphic units such as table lands, gullies and earth beams develop and sometimes sandstorms occur. Both the landslide dam and deposit of landslide-dammed lake of Haikou large-scale landslide exist now. The former is about 1000m horizontal projection length and the maximum thickness is 135m. The latter possess a length of 3km and area of 8km2 along Haikou River. Because of them, the longitudinal gradient ratio of Haikou River is increased by 11%o and decreased by 95%0, respectively. Meanwhile, the latter induced the increase of the valley floor width from tens of meters to hundreds of meters. The geomorphological effects of landslide damming is extraordinary. It can restrain river base-erosion action in the Alpine-Gorge areas, which formed the self-regulated process of two-step forward and one-step backward. Moreover, The wide deposit areas of landslide-dammed lake can be opened up for farming. At the same time of long-term influence on landform evolution, deposits of landslide-dammed lakes have created many livable places in complicated mountain areas.