基于能值理论与熵权法的灌溉分类水价研究

Study on Irrigation Classified Water Price Based on Emergy Theory and Entropy Weight Method

研究分类水价可为合理制定农业水价提供科学依据,对保障灌区良性运行、促进区域农业高质量发展具有重要意义。以粮油作物和经济作物为研究对象,选取灌溉效益分摊系数和灌溉水产出两类评价指标,采用能值理论定义了灌溉效益分摊系数,并基于熵权法构建了不同作物农业水价份额评价体系,建立了灌溉分类水价评估模型,并将其应用于咸阳市宝鸡峡灌区。结果表明,灌溉效益分摊系数为0.42,粮油作物农业水价分摊份额为0.37,经济作物为0.63;对于农业供水完全成本水价,粮油作物农业水价为0.485元/m~3,经济作物为0.827元/m~3;对于农业供水运行成本水价,粮油作物农业水价为0.377元/m~3,经济作物为0.641元/m~3。

The study of classified water price can provide scientific basis for the rational formulation of agricultural water price,which is of great significance for guaranteeing the benign operation of irrigated areas and promoting the high quality development of regional agriculture.Taking grain and oil crops as the research object,two evaluation indexes of irrigation benefit apportionment coefficient and irrigation water output were selected to define the irrigation benefit apportionment coefficient by emergy theory.The agricultural water price share evaluation system of different crops was constructed based on entropy weight method,and the irrigation classified water price evaluation model was established and applied in Baojixia irrigation district of Xianyang City.The results show that the share coefficient of irrigation benefit was 0.42,the share of agricultural water price of grain and oil crops was 0.37,and that of cash crops was 0.63.For agricultural water supply at full cost,the agricultural water price of grain and oil crops was 0.485 yuan/m~3,and that of cash crops was 0.827 yuan/m~3.As for the water price of agricultural water supply operation cost,the agricultural water price of grain and oil crops was 0.377 yuan/m~3,and that of cash crops was 0.641 yuan/m~3.