Theory and method of ecosystem health assessment in a mining area

Based on the connotation of ecosystem health in a mining area and an index system for assessment established, the status quo of ecosystem health was assessed by the fuzzy theory and its tread in development was predicted by the grey theory. The non-linear theory was applied to assess the stabilities of the ecosystem and a comprehensive assessment method was proposed. The results show that the situation of ecosystem health in the investigated mining area is sub-healthy. It is necessary to adjust and control the situation and some measures were recommended.