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Estimate of long‐term sediment discharge at tidal inlets using water level data from a tide gauge
Author(s) -
Gao Shu,
Collins Michael
Publication year - 1994
Publication title -
earth surface processes and landforms
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.294
H-Index - 127
eISSN - 1096-9837
pISSN - 0197-9337
DOI - 10.1002/esp.3290190804
Subject(s) - current (fluid) , structural basin , inlet , sediment , term (time) , tide gauge , geology , tidal current , sediment transport , hydrology (agriculture) , water level , water discharge , environmental science , oceanography , sea level , geomorphology , geotechnical engineering , physics , geography , cartography , quantum mechanics
A simple approach to the estimate of long‐term sediment discharge through an entrance to a tidal basin is described. Using the method, cross‐sectional mean current speeds are derived, on the basis of the definition of an ‘apparent tidal basin area’, from records of water level data from a single tide gauge. The obtained time‐series of current speeds are then used to define ‘local’ current speeds, through the use of a sectional distribution function for the currents. Sediment transport formulae are then applied, using the obtained speed data and other relevant parameters contained within the formulae and frequency distribution functions with regard to wave and tidal current characteristics, to estimate sediment discharge through the entrance. Analytical procedures of the method are described in detail, in an example from Christchurch Harbour (southern England).