PSR EVALUATION OF SPATIAL AGGLOMERATION OF RURAL SETTLEMENTS IN THE SMALL WATERSHED AT THE SOUTH PIEDMONT OF THE QINLING MOUNTAINS:A CASE STUDY OF ZHASHUI SECTION OF THE QIANYOU RIVER BASIN
Small watershed is the spatial carrier of rural settlements in mountainous areas.With the implementation of new urbanization construction and rural revitalization strategy,the settlements here have seen dramatic changes,entering a phase of more intensive and contractive agglomeration.In order to better find out the change and agglomeration state and trend and to put forward reasonable optimization suggestions and guidance for settlement development,there is an urgent need for appropriate evaluation tools and methods.Therefore,in view of the reality of scattered settlement patches in the small watershed at the south piedmont of the Qinling Mountains and with the help of the"pressure-state-response"evaluation model,this paper first of all proposes the PSR evaluation method focusing on the social-ecological healthy development of rural settlements in the small watershed and the research ideas focusing on key issues.Then,taking seven typical small watersheds in Zhashui section of the Qianyou River Basin as an example and with the help of the kernel density estimation tool,the paper summarizes characteristics of the internal settlement space agglomeration and develops the concepts of the core point concentration area and the point axis concentration area that can be compared.Through the screening of evaluation parameters,it defines the two-level PSR evaluation system of small watersheds and core point concentration areas,and puts forward relevant optimization suggestions in combination with practices.It provides a more scientific research basis for the rational construction of rural settlements in small watersheds.
small watershedsspatial agglomerationcore point agglomeration areapoint axis concentration areaPSR evaluation
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