No abstract

Seasonal shifts between wet and dry seasons cause marked changes in river flow regimes and therefore exchanges with the streambed surface. This seasonal variation is particularly apparent in tropical climates, which are characterized by strong differences between wet and dry seasons.However, fluxes between surface water and groundwater and the impacts of these interactions on per year. Groundwater withdrawal by households near the cross-sections was found to have a comparatively small effect on streambed fluxes, reducing the flux by up to 3 % during dry conditions, although this pumping did cause a reversal in the gradient to the stream for a short period (less than 12 hours) on one occasion during the dry season.