Fuzzy Comprehensive Evaluation for Carrying Capacity of Regional Water Resources

Evaluation of regional water resources capacity provides a scientific basis for further water resources utilization and social economic sustainable development. This paper mainly studied on the case of Lanzhou City located in the western China. By using the method of fuzzy comprehensive evaluation and basing on the historical datum of 40 years, this paper evaluated the current situation of water resource capacity in Lanzhou and its dynamic trend. The calculation of comprehensive evaluation matrix is confirmed on the nature of membership function, the dynamic trend of water resource capacity is forecasted as well after the police was putted in practice in the future. The results showed that the utilization of water resource in Lanzhou is unreasonable now. The water resources have been developed to a considerable scale, but the water carrying capacity decreased year by year. Basing on the study, this paper suggested that the system and model of developing and utilizing water resource, policy of using water, scientific policy of water price and paying policy of water resource, saving water and protecting solution society, as well as protecting engineering related with water resource should be built up step by step.