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地下水系统是灰色系统，用灰色关联分析法，可以分析出地下水埋深变化受诸多因素影响时，各影响地下水埋深因素的主次关系，以便控制地下水位。结合实例说明分析方法以及这种方法的适用条件。并指出灰色关联分析的结果与定性分析是一致的。
Groundwater system is a gray system. Gray relational analysis can analyze the primary and secondary factors that affect the groundwater depth when the groundwater depth is affected by many factors in order to control the groundwater level. An example is given to illustrate the analysis method and the applicable conditions of this method. And pointed out that the gray relational analysis of the results and qualitative analysis is consistent.