The Study On Regionalization Of Soil Erosion In Qingdao Based On 3S Technology

Soil Erosion is the worldwide serious problem of environment and the main form of Eco-destroy.Serious Soil and Water Loss has become the restrictive factor of the sustainable,stable and healthy development of a country'economy.Regionalization of Soil Erosion is an important way to improve effectiveness of the prevention and control of soil erosion. The study on Regionalization of Soil Erosion in Qingdao based on 3S technology is significant to the preventing the soil and water loss, preserving the ecological security, promoting harmonious development of the regional economy, society and environment in Qingdao.This thesis integrates nature,society,economy and the present situation of soil erosion based on the theories and methods of soil and water conservation plan,takes the 3S technology as the method,makes clear the classification index system and standard of Regionalization of Soil Erosion in Qingdao,adopts the method of the two-valued model based on grid,gets the Regionalization of Soil Erosion,makes sure the range,features and the present situation of soil erosion,and puts forward some measures of water and soil conservation.This thesis makes clear the method to define boundaries of the evaluation units and that the Regionalization of Soil Erosion should be cover all the Qingdao and the result of the Regionalization of Soil Erosion can not be used forever.Taking the 3S technology as the method to analyze and dispose of relevant factors and delimiting the Regionalization of Soil Erosion in Qingdao,it is not only expediently and rapidly to realize the systematization,informatization,digitization,modelling and visualization but also can limit the cost of human,material and financial resources.Based on the integration of nature,society,economy and the present situation of soil erosion,it makes clear the classification index system of Regionalization of Soil Erosion in Qingdao and emphatically anayzes the soil erosion intensity,soil erosion modulus,land use types,vegetation cover,soil erosion potential danger,DEM and ground slope,the degree of cure reaches,and buffers of the main rivers,reservoirs and highways.It includes not only the nature factors which influence soil erosion but also the man-made factors of influence.so,it is simply to establish connection between index and managerial decision. According to the results of analysis and evaluation of the associated elements,It formulats standards of Regionalization of Soil Erosion to make the division of the results a higher degree of credibility and more rational as far as possible.It gets the regionalization of soil erosion from over lay analysis based on two-valued model.It includes Key Prevention Area,Key Supervision Area,Key Controlled Area.Their areas respective are 4819.90km2,2962.46km2,3207.64km2 and their area percentages are 43.86%,26.95%,29.19%.It analyzes the range, features and the present situation of soil erosion and puts forward measures of water and soil conservation.