Study On The Landscape Green Accessity Appraisal Analysis

Urban green space is an important urban green infrastructure,regarded as the important spatial basis for urban sustainable development,and can provide ecological,recreational and social-cultural functions. Since 1980s , the urban planners and policy-makers widely took the urban green space area per capital,public green space area per capital,urban park area per capital,the ratio of urban green space,and green space cover ratio,etc.as the key indexes to guide planning and management in China. Although these indicators can show the problems from the quantity,it is difficult to describe the space distribution of green space landscape,so to truly reflect the effectiveness of Green space services to residents.Accessibility is a quantitative evaluation which can integrate a variety of factors to evaluate the service capabilities, and reveals about the extent of the use of urban green space.In this paper,according to the accessibility of urban green space theory,I select three main impact indicators:transport costs,population density and the attractiveness of green landscape to evaluate the accessibility of urban green space.Then based on the potential landscape to evaluate the accessibility of urban green space.Then based on the potential given 50%,40%,10%weights to transport costs,population density and the attractiveness of green landscape.Give a mesh-based calculation method to calculate the accessibility of urban green space.Finally,based on the model,use mapping function and powerful spatial analysis function of software ArcGIS9.2,evaluate parks of Hohhot former Yuquan District.Calculate the value of the accessibility,analysis the results,evaluate various indicators have the impact of accessibility of urban green space.Indicators of accessibility of urban green space have an important potential value for evaluating the quality of urban environment and measuring the natural ecosystem service functions.It is a supplement for the evaluation indexes of environmental quality of urban green,and stresses the importance of spatial distribution pattern of green.At the same time,it is also provides a scientific basis for reasonable adjustment and design the urban green space system.So let the reflection of the urban construction of the concept of people-oriented become a reality.There is strong practical significance.