Abstract
Publisher Summary This chapter presents results of a hydrological investigation involving two paired catchments in a high rainfall area of the humid tropics of northeast Queensland. The underlying geology of the catchments consists of basic metamorphic rocks that belong to the Babalanghee Amphibolite of de Keyser. This geological unit exhibits a strong and complete schistosity with a coarse grained texture. Further, it is conceivable that differences in the kind and degree of deformation, and therefore the schistosity, may affect the spatial pattern of resulting weathering, and by implication, the preferred hydrologic pathways in the catchment. The high rainfall intensities and relatively low subsurface hydraulic conductivities suggest that saturation overland flow and subsurface stormflow will occur over the areas of the catchments. The chapter also discusses antecedent catchment storage and rainfall-runoff of sample storm that considers several measures of catchment wetness appropriate to different time scales. One measure of the catchment moisture status is simply the background streamflow that varies over a period of several days and probably represents the status of the upper soil stores and perched water table.
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