Client
FMC Corporation

Water & Earth Technologies, Inc. (WET) modeled (using HELP 3 and UNSAT-H) numerous overburden dump growth medium cap (GMC) systems to determine dump configurations that encouraged surface runoff and limited infiltration through the implementation of an internal lateral drain or capillary break. The unsaturated-zone modeling was conducted to develop GMC design scenarios that would prevent or minimize potential seepage through overburden dumps that could contain selenium. RUSLE 1.06 and SEDCAD 4.0 models were used to design conceptual surface treatments (down drains, riprap, diversion channels, terraces, berms, other best management practices) to control surface-water runoff and protect against long-term erosion and sedimentation.

SEDCAD 4.0 Modeling