Spatial Temporal Pattern Evolution Of Rural Multi-function In Karst Coastal Zone Of Southwest Guangxi

Over the past 40 years of Economic Reform and open up,with the continuous development of urbanization in China,the relationship between people and land,the relationship between urban and rural areas and the pattern of land use are greatly different from those before the Economic Reform and open up,thus promoting the functional repositioning and transformation development of different spatial types of regions.As a space form relative to the city,the type function of the countryside gradually presents the characteristics of diversification.The Karst Coastal villages of Southwest Guangxi are different from the traditional villages.From the geographical division,The Karst Coastal villages is located in the West-Southwest of Guangxi,belonging to the blending zone of mountain and sea natural geographical differences;From the perspective of cultural regionalization,the main cultural characteristics of this area are the integration and transition of farming culture and marine culture.Its integration and interaction make the spatial-temporal pattern of rural multi-function more complex,so it is particularly important to study its internal mechanism.In addition,concentrated poverty is the development status of the region.In order to adapt to the development of Guangxi Beibu Gulf Economic Zone and the construction of New International Land-Sea Trade Corridor in Western China,the research on rural multi-function in this region needs to be deepened.However,the existing research is still based on the traditional rural areas,and there are few researches focusing on the rural multi-function in the blending poor areas.It is difficult to dock the current rural revitalization,the New International Land-Sea Trade Corridor in Western China,the Beibu Gulf Urban Agglomeration and other issues,and difficult to meet the service space system update,the realistic demand of village planning and rural tourism.Based on the spatial and temporal characteristics of the integration of Karst Coastal Zone in Southwest Guangxi,this paper selects 28 counties(cities)under the jurisdiction of Nanning,Qinzhou,Beihai,Fangchenggang,Chongzuo and Baise as well as the township groups of 6municipal districts,with a total of 34 counties(cities)and towns under their jurisdiction as the analysis objects,and takes 2005,2010,2015 and 2018 as the time section.Based on the statistical data,the entropy weight method is used to determine the index weight,and the index evaluation system is constructed.Then the spatial visualization of Arc GIS,Moran's I index and geographical detectors and other methods are used to explore the spatial and temporal distribution pattern of rural multi-function in Karst Coastal zone of Southwest Guangxi and identify the influencing factors of the pattern.The results showed that:(1)The rural multi-function of the study area has changed from weak to strong,the gap between the research units has gradually widened,and the overall development speed of rural multi-function has changed from slow to fast.(2)The contribution rate of rural agricultural production function in the study area is always low;The contribution rate of non-agricultural production function is increasing;Although the ecological conservation function is always in the dominant position,its contribution rate is gradually declining;The contribution rate of life security function remained stable.(3)The rural multi-function in the study area shows the pattern change from the first ladder to the third ladder,and the spatial differentiation is also gradually obvious,and the increase of rural multi-function is also gradually increasing from the first ladder to the third ladder.(4)The phenomenon of rural multi-functional agglomeration in the study area is gradually obvious.High-high type agglomeration appears in the southeast,low-low type agglomeration appears in the northwest karst rocky desertification area,and low-high type agglomeration(abnormal value)appears in Shangsi county and Long'an county from 2005 to 2015,and the scope of high value agglomeration and low value agglomeration has not changed greatly.(5)Among the factors affecting the spatial-temporal pattern of rural multi-function in the study area,the level of regional economic development is the leading factor,the slope and elevation are the supporting factors,the social and policy factors are the driving factors,and the climate factors and natural resources such as vegetation and soil are the important factors.Under the combined action of natural factors and social factors,the influence on the space-time pattern of rural multi-functions is more profound.(6)From the perspective of rural multi-function,the study of Regional Rural Revitalization should take the path of differentiation: the first ladder should focus on "planning guidance,comprehensive development",the second ladder should focus on "highlighting the advantages and making up the weaknesses",and the third ladder should focus on "highlighting the characteristics and balanced development".