Supplementary Files
Keywords
model
decision support
tidal analysis
How to Cite
Abstract
Tidal inlets which link a tidal basin to the sea via a constricted entrance are common on the south-east Australian coast. Closure, or even significant constriction, raises water levels but restricts tidal range within the basin, while open entrances provide regular and significant tidal exchange with the ocean. A rapid assessment procedure with minimal data requirements has been shown to be informative for monitoring and a useful component of any Decision Support System set up as part of a management structure. Such a system is presented in this paper. It is based on one permanent water level gauge inside the inlet plus the use of a simple, first-order hydrodynamic model to relate the tide range, mean water level and river flow to the inlet cross sectional area. The method is tested against data from the Snowy River Estuary in south-eastern Australia but would be suitable over a range of estuaries. In addition, the framework presented can also provide a mechanism to explore conditions over the range of expected data, thus allowing better selection of model schematization and runs in estuarine systems where the use of 2 or 3D modeling can be justified.References
Escoffier, F.F., 1940. The stability of tidal inlets, Shore and Beach, 8 (4), 111-114.
Godin, G., 1972. The Analysis of Tides, Liverpool University Press, 264p.
Hinwood, J.B. and McLean, E.J., 2001. Monitoring and modelling tidal regime changes following inlet scour. Journal of Coastal Research, Special Publication 34, 449-458.
Hinwood, J.B., Trevethan, M. and McLean, E.J.,2003. The effects of entrance parameters on tides in inlets, Proceedings 16 th Australasian Conference on Coastal and Ocean Engineering, September 2003, Auckland, NZ, paper 155, 8pp.
PMCid:1241349
Lawrence, P., Robinson, J. and Eisner, R., 2001. A decision environment: going beyond a decision framework to improve the effectiveness of decision making in natural resource management. Proceedings: MODSIM 2001, Canberra, Australia, 1613-1618.
McLean, E.J., Hinwood, J.B. and McPherson, B.L., 2003. Simplified science: The DST for Lake Conjola entrance management, Proceedings 16 th Australasian Conference on Coastal and Ocean Engineering, Auckland, September 2003, paper 90, 8pp.
McLean, E.J. and Hinwood, J.B., 2000. Modelling entrance resistance in estuaries, in Coastal Engineering 2000 - Proceedings ICCE2000, Sydney, Australia, 4, 3446-3457.
Mehta, A.J. and Joshi, P.B., 1988. Tidal inlet hydraulics. Journal of Hydraulic Engineering, 114(11), 1321-1338.http://dx.doi.org/10.1061/(ASCE)0733-9429(1988)114:11(1321)
Mehta, A.J. and Ozsoy, E., 1978. Inlet hydraulics. In: Bruun, P. (ed.) Stability of Tidal Inlets, Elsevier, 83-161.
O'Brien, M. P., 1931. Estuary tidal prisms related to entrance areas, Civil Engineering, 1, 738-39.
Townend, I. 2002. Identifying Change in Estuaries, Proceedings Littoral 2002, The Changing Coast, Oporto, Portugal, 235-243.
van de Kreeke, J., 1967. Water-level fluctuations and flow in tidal inlets, Journal of Waterways and Harbours Division, Proceedings ASCE, 93, 97-106.
Wilson, B.C., Hinwood, J.B. and McLean, E.J., 2010. Attractors for the entrance state of a tidal estuary, in Environmental Hydraulics, Proceedings 6 th International Symposium on Environmental Hydraulics, IAHR/ISEH, Athens, June 2010, ed. G.C. Christodoulou and A.I. Stamou, 1, 469-474.