The quantitative evaluation of continuableexploitation and utilization for geothermal resources

Utilization of geothermal resources is of strategic significance for the sustainable development and protection of the ecological environment in this area. According to the basic characteristics of geothermal development in Tianjin, fuzzy comprehensive evaluation method of the sustainable exploitation and utilization of geothermal resources was introduced based on fuzzy math and exploiting potential modulus, the ground subsidence rate and the average pressure drop rate as factors of eight evaluation criteria, and fuzzy relationship matrix and evaluation model were established in line with the characteristics in Tianjin. The model can be used to determine the sample interval at all levels, the relative standard indicators of membership and relative membership function scientifically and reasonably. The evaluation grade samples are identified rationally through the metabolic model and its parameters. Results that we have achieved are consistent with the objective reality. Compared to the traditional weighted average method, it has a higher credibility.