TY - RPRT TI - SUTRA, a model for saturated-unsaturated, variable-density groundwater flow with solute or energy transport—Documentation of generalized boundary conditions, a modified implementation of specified pressures and concentrations or temperatures, and the lake capability AU - Alden M. Provost AU - Clifford I. Voss PY - 2019 DO - 10.3133/tm6a52 UR - https://pubs.usgs.gov/publication/tm6A52 ID - tm6A52 ER -