Study On The Regulations Of Geological Hazards And Regionalization On Eastern And Western Sides Of Lujiang River Valley-One Section Of Nujiang River

This study section of the Lujiang River,one segment of Nujiang River, Daojie, Machang two maps for the study of geological hazards, geological hazards in the identification of various types of situations based on the active focus area for research and development of landforms, gullies, geological setting and influencing factors were analyzed. Geological hazards in the control situation, based on taking harassing coefficient method in the study area and geological hazard susceptibility zoning studies. This paper’s main findings are as follows:(1) The area of more types of geological hazards, landslides, collapses, landslides, unstable slopes, active gully, geothermal anomaly and karst have different levels of development. After field investigation, identified a total of 40 landslides, collapsed 62, 21 landslides, unstable slopes 21, activity gulch 9, field survey and sample hot springs 7, karst 4.(2) The area of geological hazards and topography, soil type, meteorological and hydrological, geological background, and is closely related to human activities. Most Slope geological hazards and steep terrain area of brittle rock, is also the intensity of human activities in the area of strong engineering; Nujiang debris flow for the east coast developed than the West Bank, and its development trend in the trend of further migration to the East Coast; heat The distribution of springs near the North West, mainly by the impact of the structural fault, the heat source should be the residual magma, and the cycle depth is not deep; study area, four karst development, two larger, more potential hazards on construction projects, select Address karst areas should be avoided.(3) The area of development of active gully divided into two types, one with Wangjianglou, Xiaoheishan, its place of development of large-scale development of the Quaternary sediments laid for the development of large-scale a material basis, vegetation structure is single, to shrub and grass dominated valley saw a man cultivated fruit and nut trees; the other is Shangxiayuding under its Quaternary sediments are not developed, mainly clastic outcrops limestone, dolomitic limestone, the development of fracture by the impact of the construction of rock itself, the surface is bare, no any artificial advantage. Two types of gully development of landforms, soil type, rainfall, vegetation cover and land use patterns related to their large size and heavy rainfall event when the trend of further development, for the construction of a large hazard, should avoid in the region of large-scale construction projects.(4) In the master of the situation of geological disasters in the region, with its 1:50000 topographic map base map, the various types of geological disasters point to the terrain map projection, considering soil type, geological structure, and human engineering activitiesstrength, by harassing coefficient method, in accordance with the high, medium, low, non-prone areas of four levels of the semi-quantitative study of geological hazard susceptibility zoning.