Study Of Landscape Environmental Impact Assessment On Line Type Project

Having view of yardstick in mind, this thesis analyses the way of landscape environmental impact that the line type project may cause during constructing and running as in an all-round way as possible ,regarding large-scale line type project as the research object, according to landscape aesthetics and landscape ecology ,combining both at home and abroad to existing line type understanding not of different environmental impact of the landscape, there are the following several respects: (1) Line type project, especially highway construction project ,its landscape influence including highway influence and construction of the highway course because fetching earth , quarring , digging sand , transportation (repairing roads ) , process influence that leads to the fact of getting the material etc.. For instance: Scenic spot or other natural and humane protective goals that the highway passes, can be regarded as the sensitive landscape reservation goal. The weaker the regulation ability of the vegetation is, the regional position of the landscape with the higher susceptibility, interfere slightly , can make great influlence to landscape .It's one of the important bases that carry on landscape reservation and construction plan. (2) As line project vias the fragile ecological environment (arid district ) way, because of the earth's surface perturbation , may be the risk factor of the ecological environment question of causing the regional soil erosion , land to desertificate etc. . (3) Because of destroying forest and occupating land, causing production capacity of vegetation damaged ,making recovery stability of the landscape ecosystem reduce, even resume artificially, the heterogeneity of the artificial vegetation is often different from the natural vegetation, making the impedance stability of the landscape ecosystem reduce. Because the line type project pass a long distance, so, under the accumulation effect for a long distance, the destruction to landscape ecology integrality can't be ignored. (4) Line type project blocks species flow that habitat cause broken to take, will make a lot of existence to the sensitive species of area threatened , even exterminate, cause species variety to be damaged. (5) When line type project at domatic location of ground form, no matter excavation , fill, it can block surface water flow while being all over the placeo ,or block groundwater flow, thus change the sport law of already existing hydrology in the landscape , bring a series of ecological environment questions, for instance: Land aridity, desertificate , secondary soil salinization ,etc.. This thesis takes the expressway project landscape environmental impact of northern territory in Guangzhou, Qinghai-Tibet railway Tang la sections of landscape influence, South-North Water Diversion centre line Beijing-Shijiazhuang sections of emergent water supply project ecological environmental impact for example, construct to project , landscape environmental impact that may produce carry on the ration or qualitative analysis during running. Have verified appraisal method , rationality and validity of the index that mentions : (1)Guangzhou city northern territory expressway project landscape through set up building highly with ratio hierarchical system of range of visibility environmental impact, judge landscape sense ofdepression size , combine for theory actual further investigation lay the good foundation. (2)Use two index , threshold value of landscape and susceptibility of landscape draw to Qinghai-Tibet railway Tang a landscape influence and analyse, whether result indicate is it abandon soil field , sand building stones some position set up comparatively reasonable to fetch. The project of the railway fetches earth field and sand building stones are not clicked in the protection zone of the first class landscape , influence that landscape cause can through is it abandon soil field to control to vision in other landscape project activity in the protection zone, construct campsite , sand area that building stones order and along length , railway of direction, reduce the impact to the landscape vision as much as possible . Is it fetch earth field , sand concrete position and form that building stones order to combine also , analyse and appraise project activity impact on vision landscape further, strike in order to appraise the vision to the landscape of project activity. (3)Sensitive ecological problem: South-North Water Diversion centre line input water sensitive ecological problem trunk canal involve in big alluviation water available for ecological purpose damaged issue caused to cut at a long distance of fan in front of the mountains mainly. Because channel , basically with is it is it pay direct to present to move towards by groundwater , and channel long , so probably to some location underground aquatic products catch the function of separating along the line channel, and then bring secondary influence. The analysis result thinks : Separate having or half separate canal section of groundwater, project should set up with drain pipe that channel pay...