Mechanism of water exchange a the sediment-water interface in a tidal estuary

Komai, K., Nakashita, S., Hibino. T. and Nielsen, P. (2011). Mechanism of water exchange a the sediment-water interface in a tidal estuary. In: Eric M. Valentine, Proceedings of the 34th IAHR World Congress. 34th IAHR World Congress, 33rd Hydrology and Water Resources Symposium and 10th Conference on Hydraulics in Water Engineering, Brisbane, QLD, Australia, (1085-1092). 26 June-1 July 2011.

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Author Komai, K.
Nakashita, S.
Hibino. T.
Nielsen, P.
Title of paper Mechanism of water exchange a the sediment-water interface in a tidal estuary
Conference name 34th IAHR World Congress, 33rd Hydrology and Water Resources Symposium and 10th Conference on Hydraulics in Water Engineering
Conference location Brisbane, QLD, Australia
Conference dates 26 June-1 July 2011
Proceedings title Proceedings of the 34th IAHR World Congress
Place of Publication Brisbane, Australia
Publisher Engineers Australia
Publication Year 2011
Sub-type Fully published paper
ISBN 9780858258686
Editor Eric M. Valentine
Start page 1085
End page 1092
Total pages 8
Collection year 2012
Language eng
Abstract/Summary Tidal variations of groundwater salinity and seepage flow through a stream bed were observed in a tidal estuary. The processes of fresh water intrusion and salinity recovery in the estuarine bed due to floods were analyzed using observed data in relation to the circulation between stream water and a wide-area groundwater table. The seepage flow varies with tidal variations of the stream stage on the order of 10-3 cm/s, whereas the groundwater salinity decreases only at the surface of the estuarine bed. Fresh water intrusion to the estuarine bed during flooding depends on the seepage flow caused by the hydraulic gradient between the stream stage and the wide-area groundwater table, and the fresh water intrudes into the estuarine bed during flooding to a depth twice that of tidal intrusion during non-flood events.
Keyword Seepage flow
Tidal flat
Estuary
Groundwater table
Flood
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Civil Engineering Publications
Official 2012 Collection
 
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Created: Thu, 22 Mar 2012, 16:01:40 EST by Julie Hunter on behalf of School of Civil Engineering