基于因子分析与聚类分析的江苏省节水农业分区研究

Agricultural Water-saving Regionalization Using Factor Analysis and Clustering Analysis in Jiangsu Province

结合江苏省自然环境、经济发展和节水农业发展的现状和特点,选取气候特征、地形地貌、土壤类型、灌排方式、农业生产和农村经济因素、节水农业综合效益6个1级指标及14个2级指标,建立了节水农业分区的评价指标体系。运用因子分析方法遴选节水农业分区关键指标,然后采用聚类方法对江苏省13市65县进行节水农业分区,结合分区结果及江苏省各县域实际情况,将该区域分为6类:徐淮平原水资源紧缺区、里下河平原季节性缺水区、沿海平原盐碱化区、沿江平原高沙土区、宁镇扬及宜溧丘陵工程性缺水区、太湖平原水质性缺水区。

Considering the situations and characteristics of natural environment, economic development andwater-saving agriculture development in Jiangsu province, evaluation index system for agricultural water-saving regionalization was established with six class - 1 indexes （climatic characteristics, topography andgeomorphology, soil type, irrigation and drainage type, agricultural production and rural economy, andcomprehensive benefits of water-saving agriculture） and fourteen class - 2 indices. Through factor analy-sis, key indices of agricultural water-saving regionalization were selected. Then clustering analysis wasused to regionalize agricultural water-saving region for 13 cities and 64 countries in Jiangsu province. According to the results and the practical situation, the agricultural water-saving region was divided into sixsub-regions： water scarcity region of Xuhuai plain, seasonal shortage of water region of Lixia-lake plain,salinization and alkalization region of coastal plain, high sandy soil region of plain along Yangzi River, engineering water shortage region of Ningzhenyang and Yili hilly area, water quality-induced water shortageregion of Tai-lake plain.