模糊聚类分析在盐池县林业区划中的应用研究

STUDY ON APPLICATION OF THE FUZZY GROUP ANALYSIS IN THE DIVISION OF FORESTRY REGION IN YANCHI COUNTY,NINGXIA

本文以盐池县15个乡镇为基本单元，选定年均气温、年降雨量、有林地面积所占比例等七项目为指标，运用模糊聚类分析方法进行聚类划分，区划出六个区域，各区域间自然条件等差异较大，而区内基本相同，分别是：Ⅰ城郊农林防护林区；Ⅱ柳杨堡防风固沙护牧林区；Ⅲ北部沙地沙柳固沙林区；Ⅳ中部滩地护牧林区；Ⅴ南部黄土丘陵水保林区；Ⅵ黄土丘陵水流域治理区。

The paper applied 15 towns or countrysides as divided unit, selected annual avarage temperature, rainfall, perentage of forest areas etc., as divided factors, utilized the fuzzt group analysis to distribute, directed into 6 districts: I is the protrective forest district of agriculture and grassland in the countryside; II is the protective forest district of grassland for protecting against in Luyanpu Town wind and sandi III is the northern sandbreak distriet by Salix mongolica Siwxev; IV is the protective grassland forest district in middle sheal land; V is the south forest district controlling soil erosion in loess hill; VI is the watershed aging district in loess hill.