The percolation process of WSPS is taken as a unit, and a simplified contamination percolation process combined functional model is put forward, in which includes four layers as bottom sludge layer, substrate layer.

• 把稳定塘中污染质的下渗过程看作一种单元系统，提出了概化的稳定塘中污染质下渗单元耦合功能模型，对各功能层的功能进行了描述。