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| DOI：10.13522/j.cnki.ggps.2022542 |
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| Evaluation of Water Saving in Irrigation District Based on Combination Weight-TOPSIS Method |
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ZHANG Lizhi, WANG Xin, XIE Wenpeng, XU Yuanzhi
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1. Water Resources research Institute of Shandong province, Ji’nan 250013, China;
2. Shandong Irrigation Experiment Central Station, Ji’nan 250013, China
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| Abstract: |
| 【Objective】The purpose of this paper is to explore the method of evaluating the level of water saving in irrigation districts and to find out the shortcomings of water saving in different irrigation district types in Shandong Province.【Method】The irrigation district water saving evaluation index system is built around three aspects: water saving in management, water saving in engineering and water saving in agriculture. The combination weights were calculated using hierarchical analysis and entropy weight method. Comprehensive evaluation and ranking of 14 representative irrigation districts in Shandong Province for water saving level using combined weights and TOPSIS method.【Result】The combined weight of subjective and objective weighting are management water saving 0.370 1, engineering water saving 0.489 8 and agronomic water saving 0.140 1. The evaluation ranking using combined weights and TOPSIS method is basically the same, and the ranking results show that the Yellow Diversion Irrigation District > River Diversion Irrigation District > Reservoir Irrigation District.【Conclusion】Whether the irrigation benefits of irrigation districts can be given full play is the core issue affecting different types of irrigation districts, where engineering water saving is still the main influencing factor of the current level of water saving in irrigation districts. In Shandong Province irrigation areas, there are widespread water-saving shortcomings in the implementation of water-saving assessment system construction, the implementation of water price rationality, and the popularization rate of soil moisture measurement irrigation. It is feasible to apply to self-evaluation of water saving in irrigation districts based on equiproportional conversion of combination weights to a percentage system. |
| Key words: evaluation of water saving in irrigation district; AHP; entropy weight method; combination weight; TOPSIS method |
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