The results show that the lower seep rate vails the sewage retreatment and the disposed wastewater can not contaminate the groundwater in the agriculture irrigation process.

• 试验表明,黄土层具有较小的入渗率,有利于污染物的进一步净化,处理后的城市污水在农田灌溉过程中不会对地下水造成影响。