Abstract
The tidal variations of groundwater salinity and groundwater discharge/infiltration through the riverbed were observed in a tidal estuary. The process of fresh water intrusion and salinity recovery in the riverbed due to flood were analyzed using observed data in relation to the circulation between hyporheic water and wide area groundwater. The groundwater discharge varies with tide in the order of 10-3cm/s, but the salinity decreases at the surface of the riverbed. The fresh water intrusion to the riverbed during flood depends on groundwater infiltration caused by river water and wide area groundwater, and the fresh water intruded twice deeper than that of tidal intrusion during non-flood period.
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Schedule a callMore From: Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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