Hydrology and sediment regime of a pasture, native forest, and pine forest catchment in

The hydrology and sediment regime of a 0.10-km2 pasture, 0.34-km2 pine forest, and 0.28-km2 native forest catchment were compared. The highly per-meable pumice soils of these catchments resulted in generally low annual stormflow yields (0.54-5.2 % of gross rainfall) and consequently low annual sediment yields (4.0-27.0 t/km2/yr). The pasture catchment had the highest average flows, highest peak flow rates, and greatest stormflow yields, but lowest evaporative losses. The pasture catchment also recorded the maximum instantaneous sediment ccncentrations and the maximum instantaneous sediment discharges. The pine forest catchment had the lowest annual average flows, lowest low flows, and lowest instantaneous sediment concentrations and dis-charges, but evaporative losses were similar to those from the native forest catchment. The native forest catchment had the lowest stormflow yields, lowest peak flows, and highest low flows. Some of the differences in hydrologic responses from the native forest catchment could be explained by drainage density rather than land use