中原经济区农业节水分区研究

Agricultural Water-Saving regionalization in Central Plains Economic Region

通过农业节水分区促进区域水资源高效利用,缓解农业用水短缺,为中原经济区农业可持续发展提供科学决策依据。针对中原经济区水资源短缺、农业用水量大的现状,选取地形地貌、气候特征、水资源利用状况以及农业结构4个一级指标18个二级指标,建立农业节水分区评价指标体系。运用主成分分析法对农业节水分区指标进行筛选,再采用系统聚类法对中原经济区进行农业节水分区。结合聚类结果和中原经济区43个市(县)的实际情况,将中原经济区划分为4个农业节水类型区,并结合GIS技术对其进行空间分析。各个农业节水分区与其地理位置所决定的气候特征和农业结构分布有着很好的一致性,应用该指标体系与方法获得较为合理的农业节水分区。

Agricultural water-saving regionalization can promote the effective utilization of regional water resources and relieve the short- age of agricultural water, and it also provides the scientific policy-making basis for the agricultural sustainable development in Central Plains Economic Region （CPER） . In view of the present water resources shortage and high agricultural water consumption in CPER, evaluation index system for agricultural water-saving regionalization was established with four class-1 indexes （topography, climatic, water utilization and cropping characteristics） and eighteen class-2 indices. Through principal component analysis, key indices of agri- cultural water-saving regionalization were selected. Then hierarchical cluster analysis was used to regionalize agricultural water-saving re- gionalization in CPER. According to the results and the real conditions of 43 municipalities （counties） in CPER, it was divided into 4 sub-regions. And then it was carried on spatial analysis with GIS. The results indicate that each agricultural water-saving regionalization is in better uniformity with the distribution of the climate features and agricultural structures determined by the geographical locations. As a result, the application of the index system and method can obtain the rational agricultural water-saving regionalization.