灌溉水价与灌区灌溉用水量关系研究

运用经济学理论分析了灌溉水价与灌区灌溉用水量的关系,根据2000—2009年对关中地区冯家山、羊毛湾、石堡川3个灌区的实际调查资料,对不同灌区建立农业灌溉用水需求函数,计算灌溉用水需求价格弹性。研究表明,关中地区3个灌区中,石堡川灌区弹性最高,为-1.11;冯家山灌区和羊毛湾灌区弹性分别为-0.47和-0.69,即灌溉水价提高1%,灌溉用水量将下降0.47%～1.11%。对于现行水价较低的灌区,水价调高对该灌区将产生明显的节水效应;对现行水价较高的灌区,水价继续调高。

Relationship between Irrigation Water Price and Consumption

Economic theory was applicated to analyze the relationship between irrigation water price and consumption.Agricultural irrigation water demand functions for different irrigation area were formed based on actual survey data from 2000 to 2009 and computing irrigation water price elasticity of demand was computed in three irrigation districts of Fengjiashan,Yangmaowan,Shibaochuan.The results showed that: in the Guanzhong irrigation area,Shibaochuan irrigation district had maximum flexibility(-1.11);Fengjiashan irrigation district and Yangmaowan Irrigation district elasticities were-0.47 and-0.69.Water prices increased by 1 percent,the irrigation water decreased by 0.47% to 1.11%.In irrigation District for the current low price of water,improving the water price would produce significant water-saving effect;the current high of irrigation water pricing,if the price of water continued to increase,to some extent farmers' enthusiasm of water was dampened.