地下水是敏感和脆弱的环境要素，其演变直接影响着人类的生存和健康。
Groundwater is a sensitive and vulnerable environmental factor. Its evolution directly influences the existence and health of mankind.
地下水是一种宝贵的自然资源，同时又是环境的基本要素。
Groundwater is not only the valuable natural resources, but also the basic element of environment.
根据输水过程中有关水文要素的监测资料，分析了地下水、土壤水的变化，在水量平衡分析的基础上开展了“四水”转化的研究。
It analyzes the variations of groundwater and hygroscopic water based on the monitored data of hydrologic elements during delivery and conducts the study of conversion based on water balance analysis.
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