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地下水动态是地下水系统输入、输出信息的外部反应。动态与其影响因素之间、因素与因素之间的关系,有的是明确的,有的是不清楚的。所以,地下水动态可视为一个灰色系统,可通过建立灰色模型(GM)来加以研究。一、GM 模型简述根据水文地质特征,分析动态资料,找出影响动态的主要因素,选用因素及动态变化的时间数据序列,就可建立动态的灰色模型(简记为 GM)。一般说,GM 模型可表示为:GM(n,h)式中,n 为微分方程的阶数,n=0,1,2,3……,一般不大于3,否则求解困难;h为变量数,h=1,2,3……。
Groundwater dynamics is an external response to the input and output of groundwater systems. The relationship between the dynamic and its influencing factors, the factors and the factors, some of them are clear and some are not clear. Therefore, groundwater dynamics can be considered as a gray system that can be studied by establishing a gray model (GM). First, a brief GM model According to the characteristics of hydrogeology, analysis of dynamic data to identify the main factors affecting the dynamic selection of factors and dynamic time series of data can be established dynamic gray model (abbreviated as GM). In general, the GM model can be expressed as: GM (n, h) where n is the order of the differential equation, n = 0,1,2,3 ..., generally not more than 3, otherwise difficult to solve; h is the variable Number, h = 1,2,3 ....