Estimating the Role of Bank Flow to Stream Discharge Using a Combination of Baseflow Separation and Geochemistry

This study investigated the role of bank return flow to two medium size rivers in southeast Queensland using a combination hydrograph separation techniques and geochemical baseflow separations. The main aims were provide case demonstrate spatial temporal variability groundwater contributions river systems Southeast Victoria; Avon River Mitchell River. show large variations with higher percentages during low periods more surface runoff wet years. At end Australian millennium drought, discharge accounted for 60% total 42% Michell River, whereas only had minor component wetter years, ∼15% 3% Radon chloride used means separate regional from flow. Bank accounts 2 5 times fluxes certain areas. Geochemistry physical hydrogeology enhances overall understanding connected over length.