Habitat Of The Settlement In The Crossing Zone Of Tibetan-Qiang Locatedin The Upper Reaches Of Min River

Located in the dry valley of the Min River,Tibetan-Qiang crossing zone is affected by topographic features and production and life of the multiethnic residents and is a ecological fragile zone in the upper reaches of the Min River,including Xuecheng Town and Puxi Country in Li County,Seergu Country and Waboliangzi Country in Heishui County and Zhenping Country in Songpan County.Regarding the Tibetan-Qiang habitat of the settlement crossing zone in the Upper Reaches of Min River as the research object and using 3S Technology,this study extracts the local spatial information corresponding to the habitat elements of the land use change in 2009,2014 and 2017,respectively.Based on that,this paper studies the geographical characteristics,landscape pattern characteristics,slope spectrum characteristics and the driving forces of the changing process of each habitat element.The research results can provide useful references for scientific management of land resources,reasonable handling of contradictions between society and environment,and stabilizing the sustainable development of multi-ethnic areas.The main contents and achievements of this paper are as follows:(1)Using Arc GIS10.2.1,this study extracts and investigates geographical features such as elevation,slope and aspect of the habitat factors of settlement habitat in 2009,2014 and 2017.Based on that,the similarity search of 19 villages or towns adjacent to the study area is carried out,and it indicates that the Weicheng Country and Xiameng Country are the most likely and the least possible multi-ethnic zone,respectively.(2)Using the slope spectrum and information entropy to study on cultivated habitat factors,the result shows that the cultivation rate of steep cultivated slope land also had dropped in the crossing zone of Tibetan-Qiang settlement durying 1999 to 2014,however,in 2014 to2017,the situation went back to the previous situation,which meanscultivated land on steep slope accounts for most of the all of cultivated land in the research area.(3)The landscape features are also calculated and analyzed by Fragstats4.2 from the patch type and the landscape level in the study area.The habitat element landscape fragmentation increased and patch shape tended to be more irregular;and landscape fragmentation of settlement habitat factors decreased gradually in Xuecheng Town and Puxi Country in Li County and Seergu Country and Waboliangzi Country in Heishui County.Meanwhile the landscape diversity indices of settlement habitat factors had small change and landscape pattern ofsettlement habitat factors gradually tended to be stable in Zhenping Country Songpan County.(4)In term of habitat element variation characteristics and its driving force to analyse settlement of Tibetan-Qiang crossing zon e in the upper reaches of Min River,the result reveals that the main impacts for the study region habitat factors is the factors of population,economy,labor force and the comprehensive factors o f the morphological characteristics of the settlements.