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| DOI：10.13522/j.cnki.ggps.20170075 |
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| Systematically Evaluating the Performance of Typical Water-saving Irrigation Techniques |
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SUO Ying， WANG Zhongjing
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1. Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China; 2. College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100083, China; 3. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China; 4. State Key Laboratory of Plateau Ecology and Agriculture, College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China
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| Abstract: |
| 【Objective】 This paper aims to resolve the issues involved in macro-scale evaluation of typical water-saving irrigation technology and its future development. 【Method】 Literature survey and knowledge management reconstruction method were used to analyze the characteristics of typical water-saving irrigation technology. Two categories of indicators adaptability and economic efficiency were used to systematically evaluate the indices of water-saving irrigation technology. The adaptability factors included eight indices: crop type, topography, water quality, water source, soil permeability and soil salinity, and the adaptability factors included climate and difficulty in management. The economic efficiency factors include field water use rate, irrigation uniformity, yield increase rate, investment, land saving rate and water saving level. Through refining each index score, we obtained the assignment criteria. Using the Delphi method, we constructed the weight of each index calculated its final score. 【Result】 The overall performance of micro-irrigation was the best with the scores of drip irrigation and micro-sprinkler irrigation being 2.42 and 2.77 respectively, followed by conventional sprinkler irrigation, water saving border-irrigation, surge irrigation and water-saving furrow irrigation. Small border irrigation was the worst, with a score of 5.14. The scores of economic efficiency and adaptability of all irrigation methods had strong competition. The development of those irrigation methods showed that the future irrigation would have good adaptability and economic efficiency. 【Conclusion】 From the perspective of macro scale, irrigation technology has been developing in the direction of good adaptability and economic efficiency. Improving the adaptability of instrument-based irrigation and the economics of non-instrumental irrigation is hence the future in developing water-saving irrigation technology. |
| Key words: water-saving irrigation; comprehensive performance; evaluation; Delphi method |
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