The rural residential space reconstruction in Loess Hilly Regions: A case study of Yuzhong county in Lanzhou
The rural residential space reconstruction in Loess Hilly Regions: A case study of Yuzhong county in Lanzhou
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作者：
Xie Zuolu
农村居住空间重构是重构农村土地利用的重要措施和技术之一，对耕地保护也具有重要意义。黄土丘陵地区农村人居空间改造的方法与国内其他地区存在显着差异。本文以榆中县为研究区，旨在寻找适合黄土丘陵地区农村人居空间改造的方法。首先利用GIS空间分析工具对榆中县农村宅基地空间分布进行描述。然后利用加权Voronoi图的空间划分能力和乡村“居住场与权力”对榆中县乡村聚落实施空间重构。根据乡村聚落影响力，将聚落分为集中聚落、保留型居民聚落和分散聚落三种类型。采用加权Voronoi图绘制中心聚落的影响范围。该图也被用来描述分散定居点的搬迁。然后计算出农村“宅田、电”的相对价值。那些“居住领域和权力”高于相应中心聚落的分散聚落，被列为II类保留型聚落。结果显示，榆中县共有中心聚落1077个。该聚落占地6082.6公顷，占全县居住区用地的61.25%。有I类保留型居民点4083个，土地面积2707.55公顷，占全县农村居民点用地的27.26%。 Ⅱ类保留型聚落面积235.68公顷。涉及居民点679个，占面积2.37%。有散居居民点2854个，占地905.26公顷，占全县农村居民点用地的9.12%。本研究将加权Voronoi图空间划分函数与农村“居住场与电力”相结合，使居住空间改造方案更加合理。农村居民点优化研究是农村居民点用地空间重构的基础。 Voronoi图具有农村“居住场和动力”的空间分区功能，使得居住空间改造方案更加合理。农村居民点优化研究是农村居民点用地空间重构的基础。
Rural residential space reconstruction is one of the important measurements and techniques to restructure the rural land use so that it is also significant to arable lands protection. The method of rural residential space reconstruction in Loess Hilly Regions is significantly different from that in other regions of China. This paper aimed at finding out the appropriate method for rural residential space reconstruction in Loess Hilly Regions, in which Yuzhong county was taken as the study area. Firstly, the spatial distribution of rural residential lands in Yuzhong county was described with GIS spatial analysis tools. Then the space partitioning capabilities of weighted Voronoi diagram and the rural "residential field and power" were used to implement the space reconstruction of rural settlement in Yuzhong county. The settlement was divided into three types: central settlement, retention type residential settlement and scattered settlement depends on the rural settlement influence. The weighted Voronoi diagram was used to draw the influence scope of central settlement. The diagram was also used to describe the relocation of scattered settlements. Then the relative value of rural "residential field and power" was calculated. Those scattered settlements, where the "residential field and power" was higher than the corresponding central settlement, were classified as class II retention-type settlements. The result shows that Yuzhong county has 1077 central settlements. The settlement occupies 6082.6 hectares of the lands, which accounts for 61.25% of the county lands for residential area. There are 4083I retention-type settlements, a total of 2707.55 hectares of land, accounting for 27.26% of the rural settlement lands in the county. The area of II retention-type settlements is 235.68 hectares. It involves 679 settlements and accounts for 2.37% of the area. There are 2854 scattered settlements, a total of 905.26 hectares of the lands, accounting for 9.12% of the rural settlement land in the county. This research combines the weighted Voronoi diagram space partition function with the rural "residential field and power", making the residential space reconstruction scheme more reasonable. The study of rural residential optimization is the basis of rural residential land space reconstruction. Voronoi diagram space partition function with the rural "residential field and power", making the residential space reconstruction scheme more reasonable. The study of rural residential optimization is the base of rural residential land space reconstruction.