Study On The Spatial Distribution And Accessibility Of National Protected Area In The Yangtze River Economic Belt

In this study,Based on an investigation of 1 339 national protected areas in the Yangtze River Economic Belt and using Arc GIS10.2 Spatial analysis technology to explore the spatial distribution characteristics and accessibility level of spatial distribution of National Nature Reserves.The article used geographical spatial measure GWR regression model.it analyzes important factors affect the level of accessibility of national protected areas and consider the concrete influence degree space alienation.The author puts forward some suggestions for the development and construction of the national protected areas in the Yangtze River Economic Belt.The main research conclusions are as follows:(1)The distribution pattern of national protected area in the Yangtze River Economic Belt was generally clustered and the inter-provincial distribution was unbalanced;The spatial distribution of the protected area forms a high-density core area,which is mainly located in the Taihu Lake urban agglomeration,two sub-density core areas are located in the Chongqing metropolitan agglomeration and the Nanjing metropolitan area,respectively,and extend around the three gathering areas to form five In the small-density core area,the distribution density generally shows the appearance of“East dense West sparse”that the line of“Chengdu-Kunming”was taken as a boundary,the center of gravity of the spatial distribution of the nature protected area is biased towards the eastern part of the regional geometric center of gravity;The LISA aggregation maps of national protected area show obvious differences in space,The High-High cluster area is mainly concentrated in the high mountain area along the Wushan-Xuefeng Mountain in the middle reaches of the Yangtze River and extends south to the Nanling mountain area.The downstream area is mainly distributed in the Taihu area and Wuyi mountain area;the Low-Low cluster area is roughly distributed along the Chengdu-Kunming line;around the Low-High concentration area Most of them are mainly High-High clusters;High-Low clusters are mainly scattered in Sichuan and Yunnan regions,with sporadic distribution in the middle and lower reaches.(2)The distance and time accessibility of national protected area in the Yangtze River Economic Belt were generally good.In terms of distance accessibility,the 90.14% of national protected area located within 100 kilometers of prefecture-level cities;in terms of time accessibility,The average reachable time of national protected area was 24.23 minutes With strong regional advantages and tourism development potential.The regional differences of national protected area in Yangtze River Economic Belt based on County overall accessibility are significant,it showed the appearance of“East dense West sparse”that the line of“Chengdu-Kunming”was taken as a boundary.All the test results indicate that national protected area in the Yangtze River Economic Belt and adjacent areas showed positive correlation.Distribution of hot spots regarding the accessibility showed an obvious hotsports-sub-hotsports-middle zones-sub-cold spots-cold spots circular distribution pattern from east to west.(3)The factors affecting the accessibility level of national protected area in the Yangtze River Economic Belt vary in different degrees.The most influential factor is the road network density,followed by the protected area abundance and terrain height.Protected area abundance and density of road network to the positive role of national protected area accessibility level,terrain height are negatively related accessibility level,the per capita GDP no significant impact on the accessibility.(4)In view of the spatial distribution characteristics and accessibility status of national protected area in the Yangtze River Economic Belt,some suggestions are put forward for the protection and development of nature protected area:Adhere to the priority of ecological protection and realize sustainable development;Appropriate development according to local conditions;Integrate and merge all kinds of nature reserves;Optimize the spatial layout of nature reserves;Build a "fast forward" tourism transportation network for tourism node city group;Construction of "slow travel" traffic network in the reserve;Build regional characteristic transportation lines.