Experimental study on soil water characteristic curve of municipal solid waste

The soil water characteristic curve（SWCC） of municipal solid waste（MSW） is an important parameter for the flow analysis of gas and water in landfill.The SWCC of MSW from Hangzhou was measured by the use of Tempe cell and pressure plate.The influences of composition and void ratio on SWCC were investigated.It was shown that the air-entry value of the MSW was close to 0 kPa,the residual water content was 25%³5%,and the corresponding suction was between 10⁴0 kPa,depending on composition and void ratio.The field capacity of the MSW fell into the range between 31% and 46.5%,and the corresponding gravity water content was 52%¹30%,which was consistent with the range of in-situ water content measured at Tianziling Landfill.