Groundwater is the primary water source on the island Tutuila in American Samoa, and accurate
quantification of groundwater availability is essential for well-informed management of this limited
resource. A water budget approach using SWB2, a soil water-balance model was applied to Tutuila
with the primary objective of calculating spatially and temporally distributed net-infiltration, which
directly controls groundwater recharge rate. Other water budget components such as
Groundwater is the primary water source on the island Tutuila in American Samoa, and accurate
quantification of groundwater availability is essential for well-informed management of this limited
resource. A water budget approach using SWB2, a soil water-balance model was applied to Tutuila
with the primary objective of calculating spatially and temporally distributed net-infiltration, which
directly controls groundwater recharge rate. Other water budget components such as