TY - JOUR
T1 - UNSATURATED FLOW THROUGH SOLID WASTE LANDFILLS
T2 - MODEL AND SENSITIVITY ANALYSIS
AU - Demetracopoulos, Alexander C.
AU - Korfiatis, George P.
AU - Bourodimos, Efst L.
AU - Nawy, Edward G.
PY - 1986/8
Y1 - 1986/8
N2 - ABSTRACT: The movement of precipitation water infiltrating through the material (refuse) of solid waste landfills is examined via numerical solution of the equations of continuity, and motion (Darcy's Law). The solution of the equations is obtained by a fully implicit, finite‐difference scheme. Both unsaturated and saturated surface conditions are considered, making the scheme suitable for real‐time simulation of net precipitation and moisture redistribution events. A sensitivity analysis showed that for unsaturated surface conditions the solution is primarily affected by hydraulic conductivity and capillary diffusivity, and is relatively independent of the space and time steps. In addition, the precipitation averaging process is shown to be critical in the correct computation of moisture transport during the time period where the transition from unsaturated to saturated conditions occurs. The model presented herein is suitable for analysis of water movement through landfills, and the design of bottom collection systems.
AB - ABSTRACT: The movement of precipitation water infiltrating through the material (refuse) of solid waste landfills is examined via numerical solution of the equations of continuity, and motion (Darcy's Law). The solution of the equations is obtained by a fully implicit, finite‐difference scheme. Both unsaturated and saturated surface conditions are considered, making the scheme suitable for real‐time simulation of net precipitation and moisture redistribution events. A sensitivity analysis showed that for unsaturated surface conditions the solution is primarily affected by hydraulic conductivity and capillary diffusivity, and is relatively independent of the space and time steps. In addition, the precipitation averaging process is shown to be critical in the correct computation of moisture transport during the time period where the transition from unsaturated to saturated conditions occurs. The model presented herein is suitable for analysis of water movement through landfills, and the design of bottom collection systems.
KW - landfill
KW - moisture
KW - numerical solution
KW - sensitivity
KW - unsaturated flow
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U2 - 10.1111/j.1752-1688.1986.tb01914.x
DO - 10.1111/j.1752-1688.1986.tb01914.x
M3 - Article
AN - SCOPUS:84978552591
SN - 1093-474X
VL - 22
SP - 601
EP - 609
JO - JAWRA Journal of the American Water Resources Association
JF - JAWRA Journal of the American Water Resources Association
IS - 4
ER -