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| Application of entropy weight fuzzy matter element model in comprehensive benefit evaluation of water saving irrigation |
| XIAO Junlong1, LIU Yongqiang1, TIAN Lang 1, CAO Ruizhe2 |
| 1.College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 2.Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in southern China, Ministry of Education, Hohai University, Nanjing, Jiangsu 210098, China |
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Abstract In view of shortcomings in multiple simple index comprehensive evaluation methods in comprehensive benefit evaluation of water saving irrigation in the past, an entropy weight method is used to determine weight of each evaluation index, and a matter element extension model based on the entropy weights is established to evaluate the comprehensive benefits of water saving irrigation in irrigation districts. An evaluation index system is developed by taking three aspects such as social, economic and ecological benefits into consideration. Four irrigation districts in Ji'an are evaluated with the above method and models. The results show that the comprehensive benefit level is fair in the Yinwan Bridge irrigation district, but the benefit levels are becoming fair, good and fine in the Tiannan, Guko and Nanche irrigation district, respectively. The stability of the results is verified by sensitivity analysis method. The study shows that the entropy weight analysis method has a certain application significance in the comprehensive benefit evaluation of water saving irrigation.
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Received: 28 September 2015
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