用溶质运移理论评价污水土地处理系统长期运行的处理效果  

Long-term treatment effect of wastewater land treatment system with solute transport theory

作　　者：田世英[1] 罗纨[1] 贾忠华[2] 张永锋[1] 

机构地区：[1]西安理工大学水资源研究所,西安710048 [2]西安理工大学环境研究所,西安710048

出　　处：《农业工程学报》2006年第6期152-156,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金资助项目(50209015)

摘　　要：美国农业部自然资源保护局所推荐的田间水管理模型(DRA INM OD)在模拟分析污水土地处理系统水力负荷时,只从水力角度出发,根据土壤的入渗、蒸发和排水情况来计算污水灌溉量,对污水的处理效果未加考虑。该文利用溶质运移理论对DRA INM OD模型所模拟的水力过程进行排水出流浓度计算。以西安地区为例的模拟结果表明:随着排水间距减小,水力负荷逐渐增大,处理效果明显变差;该方法还可以用来确定污水土地处理系统达到不同水质标准所要求的污水预处理程度。The field hydrology model（DRAINMOD）, recommended by the NRCS of American, can be used to analyze the hydraulic capacity of wastewater land treatment systems. But the wastewater irrigation amount is calculated based on the soil infiltration, evaporation and drainage from the hydraulic aspect, which does not consider wastewater treatment effect. The solute concentrations of drainage outflow under different hydraulic loading rates predicted by DRAINMOD was analyzed using the solute transport model. The proposed method was applied to a case study in Xi＇an, China. Results show that when the hydraulic capacity of a wastewater land treatment system increase with the decrease of the drain space, the treatment effect will be worse. This model is also used to determine the required pretreatment level of wastewater under different water quality standards in the wastewater land treatment system.

关 键 词：污水土地处理系统 排水 溶质运移 DRAINMOD模型 

分 类 号：TV21[水利工程—水文学及水资源]