基于主成分分析和模糊聚类的云南省农业节水分区

Zoning of Agricultural Water-saving in Yunnan Province Based on Principal Component Analysis and Fuzzy Cluster

缺水是制约云南省可持续发展的主要影响因素之一,大力发展农业节水是实现云南省社会经济可持续发展的基础,为保障云南省农业节水的科学发展,对云南省农业节水进行分区研究。以县市区作为分区单元,根据云南129个县市区的自然环境条件、社会发展状况、经济承受能力和水资源条件等因素,选取6个一级指标和20个二级指标,采用主成分分析法确定分区指标体系,运用模糊聚类法进行农业节水分区,结果表明:云南省可分为水资源缺乏区、季节性缺水区、工程性缺水区、干热河谷缺水区4个一级区共10个二级区;针对各区因地制宜提出适合区域特点的农业节水发展模式。应用该指标体系与方法可获得较为合理的农业节水分区结果,可为云南省农业节水管理及可持续发展提供科学决策依据。

Water shortage is one of the major adverse factors that affect the sustainable development of Yunnan Province.Effectively developing agricultural water-saving is the base of achieve sustainable social and economic development in Yunnan Province.In order to ensuring the scientific development of agricultural water-saving in Yunnan Province,the Zoning of agricultural water-saving in Yunnan province was studied.In the study,counties and districts were taken as the division unit,6 first-level indicators and 20 second-level indicators were chosen based on natural environmental conditions,social development conditions,economic capacity,and water resources conditions of 129 counties and cities in Yunnan.The principal component analysis(PCA)method was used to determine the zoning indicator system.The fuzzy clustering method was employed to divide the agricultural water-saving districts.The results indicated that the Yunnan Province could be divided into 4 first level agricultural water-saving districts(Water shortage area,Seasonal water shortage area,Engineering water shortage area,Dry-hot valley water shortage area)and 10 second level agricultural water-saving districts.According to local conditions,the agricultural water-saving development modes suitable for the regional characteristics were proposed.The application of this index system and method can obtain more reasonable results of agricultural water-saving zoning,which can provide scientific decision-making basis for agricultural water-saving management and sustainable development in Yunnan Province.