Research Progress on Hydraulics of Subsurface Flow Constructed Wetland

Subsurface flow constructed wetland(SSFW)is drawing more and more attentions in ecological engineering due to its high load rate,bearing capacity against impact load,reliable treatment effects,less occupied land,and aesthetic effect.In the design of SSFW,hydraulic condition has significant and direct influences on the removal efficiency of pollutants.The research methods and progress on hydraulics of SSFW were illustrated in this paper.The characteristic parameters of hydraulics of SSFW and their impact factors were analyzed.The effects of construction,filter,plant,and inflow configuration of SSFW on the characteristics of hydromechanics were discussed,which can provide theoretical and technical support on hydraulic design of SSFW,increasing of hydraulic efficiency,and improvement of removal effects on pollutants.