甘肃省农业用水效率控制红线研究

以甘肃省及地级行政区2009年农业用水量数据为基础,选取反映农业用水效率的6项指标,分析了农业用水效率现状,为确定控制红线提供依据。分析表明:全省去变异农业用水效率为0.97,农田亩均灌溉用水量为562m3,灌溉水有效利用系数为0.51;总体表现为用水效率较低,地区间差异较大。运用数理统计的趋势分析方法,对农田亩均灌溉用水量和灌溉水有效利用系数红线控制指标进行了分析预测,并考虑综合因素的影响,提出了甘肃省及地级行政区农业用水效率控制红线。结果显示:2015年全省农田亩均灌溉用水量控制红线为492 m3,各地区间在143~691 m3,河西5市仍是全省最高的地区;全省灌溉水有效利用系数控制红线为0.54,各地区间在0.43~0.65;农业用水效率将逐渐提高。

Research on red line of control over agricultural water use efficiency in Gansu Province

Based on the data of agricultural water consumption administrative regions in Gansu Province in 2009,6 indicators reflecting the water use efficiency in agriculture of Gansu Province were selected to analyze the current situation of agricultural water use efficiency to provide the basis for determining the control line.The analysis results showed that: the agricultural water use efficiency was 0.97 be eliminating variation,the amount of irrigation water per mu was 562 m3,and the irrigation water use coefficient was 0.51.In general,the water use efficiency was low and there were large differences among regions.Using trend analysis method of mathematical statistics,the average amount of irrigation water per mu and red line control index of effective utilization coefficients were analyzed and predicted.At the same time,in consideration of the comprehensive factors,the red line of control over agricultural water use efficiency was put forward for administrative regions in the province.The results showed that the red line of control over the average irrigation water in the whole province was 492 m3 per mu in 2015,with a range of difference between 143～691 m3 among regions,and that of the five regions in Hexi was the highest;The in red line of control over effective utilization coefficients of irrigation water was 0.54,with a range of difference between 0.43～0.65 among regions;Agricultural water use efficiency will improve gradually.