Quarry Ecological Restoration Research Based On The Ecological Sensitivity Evaluation

Chongqing is located in the southwest in China,many mountains in the area,rich in water resource,vegetation coverage rate is high,the number of species and variety.In this paper,the study area of Chongqing city nine area and the surrounding counties,scope of the study area is roughly consistent with Chongqing an hour economic circle.Along with the advancement of national ecological civilization construction,the Chongqing municipal government for the corresponding national policy,plans to shut down the city and the surrounding counties of waste in open-pit mine,achieve the goal of reducing industrial pollution sources and protect the ecological environment,repair damaged the ecological environment of quarry area,make people in harmony with the environment.This paper firstly introduces the research background and research significance and purpose of the article,by studying the relevant literature and data,this paper introduces the ecological sensitivity evaluation method and the research progress of quarry ecological restoration technology at home and abroad are introduced and the method.Again through the central city and surrounding areas in Chongqing comprehensive evaluation of ecological sensitivity and analyzes its reasons.Were compared before and after the modification of the quarry landscape pattern,on the basis of the distribution of ecological sensitivity and scrap quarry ecological environment situation and the existing quarries around the landscape types,with certain specific ecological restoration model are put forward.Through the research draws the following conclusion:(1)The research area of ecological sensitivity in total is divided into five levels,namely the sensitive area,mild sensitive area,moderate sensitive area,highly sensitive,highly sensitive area.No sensitive area covers an area of 5.81 km~2,the percentage is 0.64%,and the scope of construction land is located in the area of the match,the ecological environment is not sensitive.The main reason is that these little gradient region,it is human activity is frequent,ecological environment more from human factors.Light sensitive area covers an area of 43.19 km~2,the percentage is 4.72%,mainly distributed in low altitude,low slope,construction land centered around area,surface coverage are mainly composed of upland rice field,is mainly engaged in agricultural production and other production areas.(2)The moderate sensitive area covers an area of 125.13 km~2,the percentage is 13.68%,mainly distributed in excess of light sensitive areas and highly sensitive area,the main reason is that the region is transitional stage in upland and paddy field to forest land,land use type is given priority to with the grass and the slope is relatively large,inappropriate human engaged in agricultural production and other production activities,less man-made influence,and the ecological environment is good.Highly sensitive area of 379.56 km~2,the percentage is 41.51%,extremely sensitive area covers an area of 354.25 km~2,the percentage is 38.74%,highly sensitive and highly sensitive area are mainly distributed in the high altitude,slope is bigger,the earth's surface covered by forest region,mainly due to the area of human activities has certain restrictive factors and ecological environment benign development.(3)Quarry ecological landscape transformation,the main advantage of landscape of forest land,grassland,landscape fragmentation is higher,the average patch area is relatively small,the plaque number,landscape patch shape is irregular,poor connectivity between landscape.Quarry landscape renovation,the advantage of the study area landscape is given priority to with woodland,grassland,the decrease in the number of landscape patches,landscape area increase,fragmentation,landscape shape become rules,landscape connectivity between improved,cut off.Fully illustrate quarry ecological landscape reconstruction is helpful to improve the landscape pattern in the area,increase the advantages of the patch area,reduce the barrier between the landscape,strengthen the energy flow between various landscape types,promote the improvement of the ecological environment and sustainable development.(4)The study area are mainly distributed in the quarry moderately sensitive area,highly sensitive and highly sensitive area,ecological environment in these areas is relatively good,the ecological sensitivity is high.When choosing quarry ecological restoration model must follow the ecological benefit maximization principle and regional landscape correlation principle.Selection on the ecological environment negative impact on smaller ecological restoration model,such as ecological park,garden art area,ecological science base,mining park etc.Ecological sensitive area,to the maximum recovery of forest land,speeding up ecological environment evolution rate,prompting quarrying field of ecological environment and the surrounding natural environment other build complete ecosystem and ecological communities.