地表水入渗对垃圾填埋场水质水量影响的数值模拟分析

将填埋垃圾视作一种特殊土体，建立了综合描述垃圾填埋场内渗滤液水分的饱和-非饱和渗流、垃圾土体沉降变形、有机污染物的释放、迁移、转化，以及微生物的生长、衰减等物理化学过程的多场耦合仿真分析模型，将任意的Lagrangian- Eulerian（ALE）方法引入到模型求解中，基于自行开发的仿真分析程序，开展了地表水入渗对垃圾填埋场水质、水量影响的数值仿真分析研究。模拟结果表明：300 d的非饱和水分入渗及内源水产生可使填埋单元内渗滤液饱和液面最高达6 m；地表水入渗对水相可溶性可降解有机物浓度和厌氧微生物浓度具有显著的影响，并间接地影响固相可溶性可降解有机物和微生物的浓度分布。

Numerical simulation analysis of effect of surface water infiltration on water quality and quantity in landfills

Regarding the filled garbage as a kind of special soil, the multi-field coupled simulation analysis model which comprehensively describes saturated and unsaturated seepage of leachate water, landfill settlement, releasing, transport and transformation of organic pollutions, and growth and decay of microorganism in landfill was developed. The Lagrangian- Eulerian (ALE) method was introudued to solve the coupled model. And based on the self-developed program, the numerical simulation analysis of the effect of surface water infiltration on water quality and quantity in landfill was carried out. The numerical simulation results showed that 300-day infiltration of surface water and the generation of inner source water could make the saturated level of this landfill unit reached 6 m height mostly; the infiltration of surface water had significant effect on the distribution of soluble and degradable organic pollutants and anaerobic microorganism in aqueous phase, and indirectly affected the ones in solid phase.