Spatial Structure Of Ecological Immigration Settlements In Ningxia Based On 3S Technology

As the core of the expression of human-land relationship,rural settlement space is the carrier of comprehensive functions such as population production and life,and it is also one of the core contents of rural geography research.In this paper,by means of literature collation,"3S" technology and field investigation method,the distribution.morphology and internal structure of the new eco-migrant villages in Ningxia were obtained,and a spatial database was established.Based on the literature and related theoretical support of the spatial structure of rural settlements,this paper takes Ningxia’s ecological immigration settlements as an example to carry out spatial structure analysis and research.The research content is based on the three perspectives of "macro-meso-micro".Macro-scale study of the layout of new villages of ecological migration in Ningxia,and analysis of new village communities Characteristics of macro-spatial patterns;the meso-scale study of local environmental constraints on new villages of ecological immigrants;the morphological differences of Ningxia’s new villages of ecological immigrants;the micro-scale study of the internal structural characteristics and differences of new villages of ecological immigrants.Through research,the conclusions obtained in this paper are:(1)Macro level:First,the spatial distribution type of the new settlements of ecological immigrants in Ningxia is agglomeration,and it shows the characteristics of "large dispersion and small aggregation";The distribution of counties and districts is uneven,mainly concentrated in Hongsipu District,Shapotou District,and Tongxin County.In terms of spatial characteristics,they are generally distributed in a "South-North" direction.In line with Ningxia’s major decision of "To help the mountains with plain ".From the time scale,the new settlements in different periods depend on different immigration projects,showing obvious differences in the distribution pattern.Second,areas with relatively low altitudes and small slopes,low population density,and strong population carrying capacity are provided with important reference significance for the selection and development of new settlements for ecological migrants under the implementation and promotion of government policies.Important factors affect its distribution.Third.the internal driving factors in the evolution of the spatial pattern of ecological migration are ecological and economic stress.Based on this,the government’s policy planning promotes the implementation and development of this evolution and builds a driving force for the evolution of the spatial pattern of new settlements of ecological migration mechanism.(2)Meso-level:First.the population density of the new settlements of ecological immigrants in Ningxia has large regional differences.Generally,the density along the Yellow Economic Zone and the southern Ningxia mountain area is high,and the density in the central arid zone is low.Secondly,the monolithic form of the new settlement is dominated by the multi-nucleus form.Thirdly,the boundary forms of the new settlements of Ningxia ecological migrants are banded clusters,clustered clusters,clustered tending finger clusters,and banded clusters.Among them,clustered settlements and banded settlements are the most common.Fourth,the typical spatial forms are concentric circles with the village as the center,semi-enclosed structures with the village as the center,two scattered dwellings with parallel structures,and roads spreading in strips.(3)Micro-level:First,for the new villages of ecological immigrants,most of the new villages of ecological immigrants are relatively easy to enter and understand.Generally speaking,new settlements can be divided into two types of spatial structures.One is their space.The tendency to gather to the main road connecting residential areas and public infrastructure areas and the second is the trend to expand the space to the main road connecting traffic.Second,the degree of integration is inversely proportional to the depth value,and they both express the level of spatial accessibility.Third,the intelligibility of most typical village settlements is greater than 0.5,which indicates that the spatial structure of these settlements is complete,allowing people to quickly establish the entire system of street space,and the spatial structure is most easily recognized by users.Fourth,there is a close positive correlation between the spatial selection of new settlements and the number of axes.In this paper,from the perspective of "macro-meso-micro",the spatial distribution and formation mechanism of new settlements of ecological immigrants in Ningxia are revealed,as well as the spatial form and internal spatial structure of typical villages.Based on the "point-axis" development theory and the cost of living,this paper puts forward some suggestions on the optimization of the new settlement space of ecological immigrants,which can provide references for the follow-up improvement of the ecological migration project in Ningxia,the difficulties of ecological migration,poverty alleviation,urban-rural coordination,and sustainable development of rural settlements.