Two-dimensional Fuzzy Statistical Analysis Application in Urban Reclaimed Water Target Selection

概要

Taiwan faced a severe water shortage in 2020 and 2021. Industrial water demand has continued to rise and, despite the additional water-saving practices used by industry, other water demands, including agricultural and urban uses, have encountered similar water shortage crises. This study employs two-dimensional fuzzy statistics and analysis as a way to accurately represent the inclination, attitudes, and thinking patterns of human beings. A sample questionnaire survey was conducted on Kaohsiung residents. As part of this study, a total of 273 questionnaires were distributed; 245 valid samples were collected and, after invalid responses were removed, the valid response rate was 89.4%. Data analysis demonstrated that, when evaluating reclaimed water programs, the public attaches the most importance to water safety, followed by a stable water supply. In terms of uses for reclaimed water, the public finds it appropriate to direct reclaimed water to agriculture use first, followed by industrial use. In case of a water shortage, people find it necessary to control domestic water use, and the water control scheme they find acceptable is the“1-day supply and 1-day suspension.”When reclaimed water use is necessary under a water control program, people find that NTD 15-20 is the most acceptable pricing plan.