5USEPA. Subsurface Flow Constructed Wetlands for Wastewater Treatment [ M ]. Washington D C : USEPA, 1993.
6Blazejewski R, Murat-Blazejewski S. Soil dogging phenomena in constructed wetlands with subsurface flow [ J ]. Water Sci Tecbnol, 1997,35 ( 5 ) : 183 - 188.
7McCray J E, Huntzinger D N. Mathematical modeling of unsaturated flow and transport in soil-based wastewater treatment systems [ A ]. WEFTEC 2000 Symposium [ C ]. Washington D C : Water Environment Federation,2000.
8Nguyen L M. Organic matter composition,microbial biomass and microbial activity in gravel-bed constructed wetlands treating farm dairy wastewaters [ J ]. Ecol Eng, 2000,16(2) : 199 - 221.
9Chris C T M, James P S S, Martin P U. Organic matter accumtdation during maturation of gravel-bed constructed wetlands treating farm dairy wastewater[J]. Water Res, 1998,32(10) :3046 - 3054.
10Platzer C, Mauch K. Soft clogging in vertical flow reed beds : mechanisms, parameters, consequences and solutions? [ J ]. Water Sci Technol, 1997,35 (5) : 175 - 181.