| Research on red line of control over agricultural water use efficiency in Gansu Province |
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| DOI：10.7606/j.issn.1000-7601.2012.03.18 |
| Key Words: agricultural water water use efficieney red line of control Gansu Province |
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| Abstract: |
| Based on the data of agricultural water consumption administrative regions in Gansu Provinee in 2009, 6 indicators reflecting the water use efficiency in agriculture of Gansu Province were selected to analyze the curent 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 differ-ences 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 con-sideration of the comprehensive fnctors, 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 wa-
ter was 0.54, with a range of difference between 0.43~0.65
among regions; Agricultural water use efficiency will improve
gradually. |
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