Coral Reef Hydrology: Field Studies of Water Movement within a Barrier Reef

摘要: Water movement through the framework of Davies Reef, a coral reef in central Australian Great Barrier was studied using field and laboratory determinations permeability, tide gauge measurements water levels, dye tracers, pore chemistry. Flow is driven by current, wind-induced, or tide-induced level differences which were shown to occur between front lagoon. The hydraulically very heterogeneous with bulk flow occurring high permeability zones (voids rubble) at velocity on order 10 m/d. Pore exchange less permeable occurs much slower rate. Vertical components are significant. Chemical data indicate that carbonate precipitation solution so porosities, permeabilities, paths may change time. Implications for nutrient transfer benthic sediments fresh resources islands discussed.