| Mishan city is located in the northeast of Heilongjiang Province, is located in Wanda mountain, Xingkai Lake, connected with the Russian land, is the border city, belonging to the Jixi city administrative divisions. Mishan city is one of the most important commodity grain bases in China, Southeast China Russia boundary Lake Xingkai Lake National Nature Reserve, is one of the world’s three largest wetland, is rich in tourism resources. Mineral resources in Mishan city are coal, graphite, potassium feldspar, limestone, iron, titanium, gold, stone and other ten kinds, mining, machinery industry has been built, steel, textile, building materials based industrial system.Recent years, with the development of the national economy, the increasing economic activities of human beings, to a certain extent, destroyed the ecological environment, will likely induced collapse, landslide and other unexpected geological disasters, geological disasters exacerbate the development degree of soil erosion.Mishan city were found of geological hazards and risks at thirty four, the collapse of nine, unstable west slope four, potential three landslides, three ground subsidence, water and soil erosion fifteen. Geological hazard body divided according to the scale,0ne medium, the rest are small; the disaster grade division one medium, the rest are small; according to the classification of damage degree, one for intermediate, the rest are light. To predict the development trend of geological hazard point stability, ten for the poor stability, the rest are poor stability and good.Due to the geological disasters in Mishan city economic loss of status evaluation and forecast evaluation. Geological disaster economic loss has caused the current situation assessment of thirty points, the collapse point nine, three potential debris flow, ground subsidence and erosion of three, fifteen, the total direct economic loss of about1124000 yuan, the majority is caused by soil erosion disaster. Geological hazard prediction assessment, threatened population seventy five people, the direct economic loss of about6550000yuan, the unstable slope potential direct economic loss of about5170000yuan, landslide potential direct economic loss of about270000yuan, the direct economic loss of potential debris flow is about550000yuan, the direct economic loss of soil erosion hazard potential is about560000yuan.According to the development situation of geological hazard and the geological conditions of Mishan City, the zoning, divided into geological disaster prone areas, in the prone areas, low prone areas. Geological disaster prone area is257km2, accounting for3.3%of the total area. Mainly distributed in the west of renju Lian Zhu Shan Zhen Mountain hilly area. This area has occurred and potential geological disaster twelve. Among them, collapse three, two unstable slopes, potential two landslides, soil erosion five. Prediction of direct economic losses of around620000yuan. Geological disaster prone areas of two, the total area of2561km2, accounting for32.6%of the total area. Distributed in the northwest of the town, Kai Fu Yuan Xiang; Pei De Zhen, Black Tai Zhen and too Western Pingxiang; central city of Mishan, east of the Muling River Valley, Cheng Zi He Xiang-Xingkai Lake Township-Bai Pao Zi Xiang line west of low mountain and hilly areas. Geological hazard in this area of the danger point eventeen. Among them, the collapse of six, two unstable slopes, potential one landslides, ground subsidence and erosion at three five. Prediction of direct economic losses of around344000yuan. Geological disaster prone area distribution of low in the survey area, the majority of besides the geological disaster prone areas and geological disaster prone areas, an area of5025km2, accounting for the city’s area of64.1%. The area developed in five geological disasters, are soil erosion, soil erosion, destruction of arable land, have a certain impact on agricultural production, has caused a direct economic loss of160000yuan, the smaller losses. |
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