The indoor sand column is used to stimulate the function of CRI, which is reflected by several water quality indexes such as COD, NH4(superscript +)-N, TN and TP.

• 采用室内砂柱试验的方法对地下式构建人工快滤系统进行模拟，测定了系统的COD、NH4(上标+)-N、TN、TP等水质指标，验证了系统的出水水质情况。