农村居民点用地空间特征分析——以许昌市为例

Analysis of the Characteristic at the Rural Residential Spatial Land——Example of Xuchang City

本文以许昌市历年土地利用变更调查数据及研究区域的经济、人口等统计数据为基础,主要采用景观指数及变异系数方法,分析农村居民点用地的空间分布特征和变化趋势。通过景观格局对比分析,发现平均斑块面积和平均斑块数可以作为判别区县居民点违法用地情况的指标,平均斑块面积越小、数目越多,说明农村居民点违法乱建现象越严重,以此可以作为农村居民点用地核查的依据和指标。变异系数是从方差分析的角度总结归纳出来的指标,能很好的反映出区域居民点面积大小分布的离散程度,以此判别农村居民点用地违法扩张的程度,可以作为核查农村居民点用地的指标,与景观指数平均斑块面积和数目相结合能起到更好判别的效果。

Based on the survey data of land use change over the years and other statistical data of Xuzhou City about the regional economic and demographic,specifically using the landscape index and coefficient of variation,this paper analyzes the characteristics of spatial distribution of rural residential land and trends.Through the comparative analysis of landscape pattern,it discovers that the average plaque area and the average number of patches can be used as indicators to determine the case of illegal settlements in the county land situations.The area smaller patch on average with more number describes more clearly the serious problem of illegal unauthorized rural settlements,thereof can be used as indicators of rural residential land based verifiable.The coefficient of variation is summarized in terms of indicators out of the analysis of variance,which could explain the degree of dispersion of the size of the settlement area to determine the extent of the illegal expansion of residential land in rural areas; it could be also an indicator to check the land of rural housing with the help of the landscape Index average plaque area and number in order to better have a good result.