At first, through analyse the influence on the soil, crops, groundwater and function of water body of sewage, the index system of sewage irrigation security appraisal have been set up.
首先，通过污水对土壤、农作物、地下水以及水体功能的影响分析，建立了污水灌溉安全性评价的指标体系。
Water resources systems of irrigation district are composed with surface water system and groundwater system.
灌区水资源系统由地表水系统与地下水系统构成。
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