Study On The Selection Of High-efficiency Water-saving Irrigation Mode For Mountain Agriculture

Mountain high-efficiency water-saving irrigation as a highly efficient irrigation mode is an effective way to alleviate the seasonal water shortage in mountainous areas and achieve the best economic,social and ecological benefits.Based on the previous research results,combined with the characteristics of mountain agriculture and the principle of irrigation mode selection,this paper takes the selection of high-efficiency and water-saving irrigation mode for mountainous agriculture in Xingren County of Guizhou Province as an example,uses MATLAB to process data,and analyses the influencing factors,fuzzy comprehensive evaluation and risk of the selection of high-efficiency and water-saving irrigation mode for mountainous agriculture.Based on the analysis of the agricultural characteristics of the mountainous areas in Xingren County and the influencing factors of irrigation mode selection,three kinds of preparations: the storage-spray mode,the storage-drip mode and the lifting-drain mode are proposed.Based on the selection of three alternative irrigation models was used to verify the role of the fuzzy comprehensive evaluation method in the fuzzy comprehensive evaluation of high-efficiency and water-saving irrigation model in mountains agriculture and the application of analytic hierarchy process(AHP)in the risk analysis of high-efficiency water-saving irrigation mode selection in mountain agriculture were carried out.The results show that the selection of high-efficiency and water-saving irrigation modes in mountain agriculture is influenced by many factors,such as natural resources,social factors,economic factors and engineering and technology factors.The influencing factors should be classified and summarized according to the characteristics of mountain agriculture and the principle of selection of irrigation modes.The method of fuzzy comprehensive evaluation is used,this paper makes a multiobjective fuzzy comprehensive evaluation on the high-efficiency and water-saving irrigation mode of mountainous agriculture in Xingren County,and summarizes 16 evaluation indexes of three categories,namely,economic evaluation,social evaluation and ecological evaluation.The fuzzy comprehensive evaluation index system for high-efficiency and water-saving irrigation mode of mountain agriculture was constructed,and a fuzzy comprehensive evaluation model was established by combining subjective and objective weighting method.According to the principle of optimum selection of maximum membership degree,the best storage-drop pattern was obtained by sorting the alternative irrigation patterns.This storage-drop pattern is a scientific and reasonable high-efficient water-saving irrigation pattern for mountain agriculture,and is most suitable for the development of mountain agriculture in Xingren County.Through the risk analysis of the selection of high-efficiency and watersaving irrigation mode for mountain agriculture in Xingren County,the scientific and rational application of AHP in the selection of irrigation mode was verified.Regardless of natural resources risk,social and economic risk,engineering technology risk,or other uncertain risk analysis,the selection of storage-drop model in Xingren County is the least risk,and is more in line with the development needs of mountain agriculture in Xingren County,an high-efficiency and water-saving irrigation model.