基于GIS的北部湾城市群国土空间开发适宜性评价OA

[Objective]The Beibu Gulf Urban Agglomeration is a national-level urban agglomeration approved by the State Council.In recent years,accelerated industrialization and urbanization have intensified the conflict between territorial space development and protection,making it urgent to clarify the suitability of land space development through scientific evaluation.[Methods]This paper employs GIS spatial analysis technology to systematically evaluate the suitability of territorial space development suitability.By incorporating data from the Third National Land Survey,it identifies spatial conflicts and development potential,and establishes a complete technical framework of"suitability evaluation-risk identification-potential analysis".[Results](1)The proportions of extremely important,important and generally important areas for ecological protection areas are 21.72%,32.35%and 45.93%respectively.Outside the extremely important ecological protection areas,agricultural production conditions are generally favorable,and the proportions of suitable,generally suitable and unsuitable areas are 66.53%,0.51%and 11.24%respectively;the proportions of suitable,generally suitable and unsuitable areas for urban construction are 27.52%,21.17%and 29.59%respectively,and suitability is often constrained by water and soil resource endowments as well as location conditions.(2)There is a certain degree of conflict between current human activity areas and the extremely important areas for ecological protection,with a conflict area of 5,667.61 km2,representing 22.46%of the current human activity areas.The conflict areas should be gradually and orderly phased out;some of the current cultivated land is located in the areas unsuitable for agricultural production,covering 2,495.36 km2 or 19.1%of the current cultivated land.Such conflicts should be reasonably adjusted based on actual conditions.(3)The potential area for agricultural production is 340.2 km2,and the potential scale for urban construction is 243.1 km2.The overall potential is limited and unevenly distributed in space.Future development should take this into account in conjunction with the regional development priorities.[Conclusions]The results provide a scientific basis for implementation evaluation of territorial spatial planning,spatial conflict coordination,and utilization of existing land stock in the Beibu Gulf Urban Agglomeration and related provinces and cities.