用水量效益函数能够指示用水效益随用水量的变化特征。基于2000—2018年唐白河流域5个地区用水量和经济效益指标的面板数据,应用固定效应模型,分别采用截面加权最小二乘法和似不相关法进行回归计算,定量分析该地区用水经济效益与用水量的关系,得到唐白河流域及其不同产业的用水量效益函数。结果表明:唐白河流域人均农业增加值随农业用水量的变化关系呈倒“N”型,人均工业增加值随工业用水量的变化关系呈增长型,人均GDP随用水总量的变化关系呈“U”型;在不同产业中,各地区的经济效益与用水量均有着较大差异,需采取不同的用水策略。研究成果可为唐白河流域的用水管理与水资源配置提供参考依据。
Abstract
The water use benefit function indicates the characteristics of economic benefits varying with water use. According to the panel data of water use and economic growth indicators of five regions in Tangbai River Basin from 2000 to 2018, we analyzed quantitatively the relation between water use benefits and water use using the fixed effect model through regression calculation with the cross-section weighted least square method and the seeming unrelated regression. We obtained the water use benefit functions for the whole basin and for different industries in the basin. Our findings suggest that the relation curve of per capita added value of farming, forestry, animal husbandry and fishery against agricultural water use displays an inverted N-shape; per capita industrial added value increased with industrial water use; the relation curve of per capita GDP against total water use displayed a U-shape. The water use and economic benefits of different industries varied remarkably among different regions, hence calling for varied water use strategies. The research findings offer reference for water management and water resources allocation in Tangbai River Basin.
关键词
用水量效益函数 /
环境库兹涅茨曲线 /
经济效益 /
似不相关回归 /
截面加权最小二乘法 /
唐白河流域
Key words
water use benefit function /
Environmental Kuznets Curve (EKC) /
economic benefits /
seeming unrelated regression /
cross-section weighted least square method /
Tangbai River basin
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