地下水的水量和盐分在收支方面的数量关系，称为地下水均衡。其中水量均衡为水均衡，盐分均衡的话称为盐均衡。
地下水均衡监测试验，河南省先后建立有封丘、郑州、商丘三个均衡场。
Three groundwater graded fields have been built in Fengqiu, Zhengzhou and Shangqiufor the experiment of groundwater graded monitoring in Henan Province.
以水均衡方程为基础，应用时间序列分析法，建立系统管理模型，对地下水资源系统进行系统运行控制、预测和管理。
Systematic management model is set up by time series analytic method based on water balance equation to control, predict and manage groundwater resources system.
通过历史资料的验证，表明本文所建立的水均衡模型对于地下水位变动的预测是可靠的，而且简单可行。
It is proved by the verification of historical data that the water balance model is credible and easily available for the forecast of groundwater table variation.
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