关键词: 地下水环境, 耗散结构, 灰色关联熵, 演化模式, 地下水

Abstract:

According to the theory of dissipative structure，the greater is the information entropy of system, the lower is its order degree. The groundwater environment is a dynamic ordered system, and it meets the characteristics of dissipative structure. The characteristics of information entropy reduction during the course of groundwater system evolution can be used to distinguish its evolution direction. The groundwater resource quantity was regarded as the sequential parameters, which determined order degree of groundwater system. The order degree of groundwater system can be indicated by concordance degree between groundwater actual withdrawals and allowable withdrawals of the groundwater system. The evaluation model of groundwater environment evolution pattern based on grey correlation entropy was founded, through which the evolution direction can be distinguished by using the change characteristics of information entropy in various timeinterval. The model was applied in the study of groundwater environment evolution in Hengshui, and the results indicated that information entropy of deep groundwater system had been tending to decrease since 1970’s, and the function of the groundwater system had been degenerating. Therefore, the groundwater environment was in the evolution state of rebuilding a new stable state, which was significantly different from the primitive stable state. This assessment result is consistent with the evolution trend reflected from the geological environmental monitoring of groundwater environment.

Key words: groundwater environment, dissipative structure, grey correlation entropy, evolution pattern, groundwater