But there are some problems to understand and choose the attribute index of the assessment system of the groundwater function, which have important effect on the assessment results.
但是，对于如何理解和选用地下水功能评价体系中属性指标组成及其内涵，尚存在需进一步深入认识的问题。
2
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。
3
It is shown that the RS theory is simple, precise and practical for the attribute reduction of the groundwater quality index through the theoretical analysis and practical application.