高志玥,李怀恩,张倩,成波,贾斌凯,田若谷.宝鸡峡灌区农业供水效益C-D函数岭回归分析[J].干旱地区农业研究,2018,36(6):33~40
宝鸡峡灌区农业供水效益C-D函数岭回归分析
Analysis of irrigation benefit of Baoji Gorge Irrigation District using Ridge regression of C-D production function
  
DOI：10.7606/j.issn.1000-7601.2018.06.06
中文关键词:  C-D生产函数  岭回归分析  农业供水效益  时空变化  宝鸡峡灌区
英文关键词:C-D production function  ridge regression analysis  benefit of irrigation water  temporal and spatial variation  Baoji Gorge Irrigation District
基金项目:国家自然科学基金（51479162）
作者单位
高志玥 省部共建西北旱区生态水利国家重点实验室（西安理工大学），陕西 西安 710048
黄河水利委员会上游水文水资源局，甘肃 兰州 730000 
李怀恩 省部共建西北旱区生态水利国家重点实验室（西安理工大学），陕西 西安 710048 
张倩 省部共建西北旱区生态水利国家重点实验室（西安理工大学），陕西 西安 710048 
成波 省部共建西北旱区生态水利国家重点实验室（西安理工大学），陕西 西安 710048 
贾斌凯 省部共建西北旱区生态水利国家重点实验室（西安理工大学），陕西 西安 710048 
田若谷 省部共建西北旱区生态水利国家重点实验室（西安理工大学），陕西 西安 710048 
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中文摘要:
      为了计算农业灌溉供水效益，将水作为生产要素之一列入C-D生产函数，并在传统投入要素基础上增加化肥、耕地要素，用机械总动力代替固定资本投入建立模型，采用岭回归分析计算农业水资源弹性系数，进而计算了灌区的农业供水效益，为区域生态基流保障补偿研究提供依据。计算结果显示，宝鸡峡灌区所在宝鸡、咸阳两市的农业水资源弹性系数分别为0.098和0.075；2015年灌区农业供水效益平均为2.89元·m-3，其中宝鸡市2.29元·m-3，咸阳市3.34元·m-3，灌区农业供水总效益达14.6亿元，供水效益逐年递增。灌区农业供水效益的空间差异主要来自于两市的农业经济总量差异，而农耕灌溉技术水平与作物种植结构不同正是造成这一空间差异的主要原因。
英文摘要:
      In order to estimate the benefit of irrigation water supply, two economic models based on the Solow’s advanced Cobb-Douglas (C-D) production function were established by using water as one of the essential production factors, fertilizer and plowland as supporting factors, and taking mechanical power input as a replacement offixed inputs. Then, the elasticity coefficients of the water in Baoji and Xianyang,the two cities of Baoji Gorge Irrigation District, were obtained using Ridge Regression Analysis. Thus, the irrigation benefits of water supply were calculated. The results showed that the elasticity coefficient of water for Baoji and Xianyang was 0.098 and 0.075, respectively.The irrigation benefit had been increasing year by year,and the total benefit was increased to￥1.46 billion by 2015, which was equivalent to an average ￥2.89·m3, among that, it was ￥2.29·m3 in Baoji and ￥3.34·m3 in Xianyang. The regional differences of the returns was mainly due to the total agriculture production outputs between the two cities within the Irrigation District, also, the difference in agricultural technology usage and the composition of crops may result in the overall difference.
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