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1地下水动态数据平稳序列处理地下水系统是随机系统,作为系统输出的地下水动态数据必然受其支配,呈现出随机变化特征。将地下水系统的输入和输出看作是平衡随机过程,是基于地下水系统处于相对的稳定状态。如水文地质条件在相当长的时段内变化缓慢,地下水在多孔介质中的客观条件和环境限制就可认为与时间无关。这一点在对许多地下水位、泉流量实际观测资料的统计检验中得到了较好的体现。目前在随机微分方程用于地下水计算时,其中的参数、水位等就是被看作平稳过程。但是,值得注意的是,严格地说,地下水动态是一个非常复杂的非平稳时间序列,但为了实用方便,可以把地下水动态概化成平稳性序列(对系统输入及转换系统也是如此),从而达到模拟地下水动态总趋势和反求水文地质参数之目的。但是对于不定期抽水井周围的地下水位、降水强度较大导致地下水位很快受到影响(如岩溶地区);自然边界中水文地质条件发生较大改变等情形,要慎重处理。
A steady sequence of groundwater dynamic data processing groundwater system is a random system, as the system of groundwater output dynamic data must be subject to its control, showing a random variation. Considering the input and output of groundwater systems as a balanced stochastic process is based on the relative steady state of groundwater systems. If hydrogeological conditions change slowly over a long period of time, the objective conditions and environmental constraints of groundwater in porous media can be considered as being independent of time. This is well reflected in the statistical tests of actual observation data on many groundwater levels and spring flows. At present, when stochastic differential equations are used for groundwater calculation, the parameters, water level and so on are regarded as a steady process. However, it is worth noting that, strictly speaking, groundwater dynamics is a very complex non-stationary time series, but for practical convenience, groundwater can be dynamically summarized as a stationary sequence (also for system input and conversion systems) to achieve Simulate the general trend of groundwater dynamics and reverse the purpose of hydrogeological parameters. However, in the case of groundwater tables around irregular pumping wells, the groundwater level will be affected rapidly due to the large precipitation intensity (eg, karst areas); the hydrogeological conditions in the natural boundary should be greatly changed.