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| Spatial mechanism and optimal allocation of rural settlementson village scale based on Voronoi diagram—Taking Dazhu Village in Hechuan District of Chongqing as an example |
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| Abstract: |
| The scattered spatial distribution，weak gathered function and inefficient use of rural settlements，
are poor phenomena of rural area system evolution in the process of Rural-Urban transformation，analyzing the spatial
mechanism and making appropriate spatial optimization strategies have become the breakthrough of land resources
rational use，promotion of construction of new countryside and integration of urban and rural development. We chose
the Dazhu Village in Hechuan District of Chongqing as the sample，and adopt the method of Voronoi diagram combined
with GIS to analyze the spatial distribution characteristics of rural settlements and the spatialed distribution index
under the influence of different space factors. The results showed that whole rural settlements distribution of Dazhu
Village was the cluster type with 3 distribution modes：spot，ribbon pattern，bulk，but there was a random difference
among communities. The distribution exponential trend line of rural settlements showed some regularity，the rural
settlements prefer red to 1 to 3 terrain niche，0-200 m water source buffer，0-100 m trunk roads buffer. According to
the mechanism of rural settlements spatial distribution，combined village domain differentiated environmental conditions
and the demands of farmers，we constructed three
kinds of spatial optimization modes，which were the
public service facilities leading type，advantaged rural
settlements leading type，traffic trunk leading type，and
also established“ local-centers” rural settlement system，
which regarded the central village as the core，grass-roots
village as assistance. |
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