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- Title
Comprehensive evaluation method for irrigation-water use efficiency based on circulation-correction.
- Authors
Li Haoxin; Shao Dongguo; He Sicong; Chen Shu
- Abstract
Improving irrigation-water use efficiency plays an important role of the most strict water resource management system. Meanwhile, irrigation-water use efficiency is a significant index for evaluating the development of water-saving irrigation. Currently, the process of evaluating irrigation-water use efficiency is one of the key issues for agricultural water utilization. As a result, there are many single evaluation methods, mainly including subjective weight and objective weight of indexes. But these two methods both have disadvantages and advantages. In our study, the main purpose was to treat the inconsistent evaluation results of irrigation-water use efficiency obtained from different single evaluation methods. And seven indexes were chosen from source of water to fields during water transportation to evaluate irrigation-water use efficiency. Firstly, irrigation-water use efficiencies of 12 irrigation districts were evaluated by three single evaluation methods, including Catastrophe theory evaluation method, Entropy method and Analytic Hierarchy Process method, based on the data collected by field investigation. Then, four combined evaluation methods were used to treat the results from single evaluation methods with Spearman as test criterion. If the results from the four combined methods could pass Spearman test, the ranks of every irrigation district can be determined. These four methods are average method, Board method, Copeland method and fuzzy Borda method. On the other hand, if the results could not pass Spearman test, the combined methods were used again, which was named circulation-correction. Results showed Shuangpai irrigation district in Hunan ranked first and Yindan irrigation district in Hubei ranked last. In the mean time, the indexes of the criterion layer constituted by water transportation and distribution of canal system, water use of field and water productivity, were evaluated with the circulation-correction method. Finally, the irrigation districts were divided into three categories by the connections of the ranks of criterion layer and the ranks of irrigation districts so as to find out the main factors affecting the ranks of the irrigation water use efficiencies of irrigation districts. Dujiangyan irrigation district, Shaoshan irrigation district and Shuangpai irrigation district were in ?category with the high standard of irrigation-water use efficiency. Dongfengqu irrigation district, Hualiangting irrigation district, Shanxishimen irrigation district and Ganfupingyuan irrigation district were in ?category, which should make a great improvement in one aspect of criterion layer. Zhanghe irrigation district, Sanhulianjiang irrigation district, Zekou irrigation district, Yindan irrigation district, Yahekou irrigation district were in ? category, which should make all-round effort to build up the irrigation districts. In conclusion, our study provides references for evaluating water-saving implementation and the irrigation water management.
- Publication
Transactions of the Chinese Society of Agricultural Engineering, 2014, Vol 30, Issue 5, p65
- ISSN
1002-6819
- Publication type
Article
- DOI
10.3969/j.issn.1002-6819.2014.05.009