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| DOI：10.13522/j.cnki.ggps.20170002 |
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| Evaluating Multiple Benefits of Revamping Water-saving Irrigation District Based on the PSR Model |
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SHANG Linxin, LI Yufei, SHAO Guangcheng, DING Mingming, YAO Junqi, SHAO Luyang
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1. College of Agricultural Engineering, Hohai University, Nanjing 210098, China;2. Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Ministry of Education, Nanjing 210098, China; 3. Water Conservancy Bureau of Huai’an District, Huai’an City, Huai’an 223200, China; 4. Nanjing Water Affairs Bureau, Nanjing 210036, China;
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| Abstract: |
| 【Objective】 The purpose of this paper is to improve the existing evaluation system for determining the grade of water-saving benefits produced from revamping irrigation infrastructures.【Method】 Based on the pressure-state-response model, we constructed the evaluation index system to estimate the water-saving benefits of reconstructing existing irrigation districts, and explained in detail of the basis of re-division of the water-saving benefits evaluation index under the framework of PSR model. By coupling the analytic hierarchy process and the entropy weight method, we got the combination of subjective weights and objective weight, and established the matter element analysis and evaluation model of the water-saving benefit of irrigation district reconstruction. The statistical data of 20 exemplar irrigation districts in China were analyzed and used to verify the model. 【Result】 The benefit grade of water saving transformation in the exemplar irrigated area 1 was better. Grain production per capita and water productivity were currently shortcoming in revamping irrigation districts. The calculated results for the 20 irrigation districts showed that the misjudgment rate of matter-element analysis method was only 5% in evaluation of water-saving benefit.【Conclusion】If the fuzzy comprehensive method and the grey correlation method are no consistent in evaluating the water-saving benefit of irrigation districts, one can consider of using the PSR model a reference to determine the grade of water-saving benefits. |
| Key words: irrigation district； water saving benefit; model; matter element analysis |
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