Sandon River

Physical characteristics

Latitude (ºS)-29.67
Longitude (ºE)153.33
Catchment area (km2)1131.5
Estuary area (km2)1,22.6
Estuary volume (ML)32393.5
Average depth (m)41.1
Roy et al. (2001) classification5III/5/D
Entrance condition6O
  1. Derived from DECCW (2010) NSW estuaries and coastal catchments spatial database.
  2. Includes area mapped as open water (see note 1), mangrove and saltmarsh areas (Creese R. G., Glasby T. M., West G. and Gallen C. (2009) Mapping the habitats of NSW estuaries. Industry & Investment NSW Fisheries Final Report Series 113. Port Stephens, NSW, Australia.
  3. Based on areas at 0.6 m AHD (Roper T., Creese B., Scanes P., Stephens K., Williams R., Dela-Cruz J., Coade G. and Coates B. (2011) Assessing the condition of estuaries and coastal lake ecosystems in NSW. Office of Environment and Heritage, Sydney).
  4. Estimated by dividing the total volume at 0.6 m AHD by the total surface area of the estuary including mangrove areas but excluding saltmarsh (Roper et al., 2011)
  5. Estuary group: I = oceanic embayment, II = tide dominated estuary, III = wave dominated estuary, IV = intermittently closed estuary V = freshwater bodies
    Estuary type: 1 = ocean embayments, 3 = drowned valley estuary, 5 = barrier estuary, 6 = barrier lagoon, 7 = interbarrier estuary, 8 = saline coastal lagoon, 9 = small coastal creeks, 11 = brackish barrier lake. Evolution stage: A=youthful, B=intermediate, C=semi-mature, D=mature.
    (P. S. Roy, R. J. Williams, A. R. Jones, I. Yassini, P. J. Gibbs, B. Coates, R. J. West, P. R. Scanes, J. P. Hudson and S. Nichol (2001) Structure and Function of South-east Australian Estuaries. Estuarine, Coastal and Shelf Science 53, 351-384)
  6. Entrance conditions: O = open, T = trained, I = intermittent.

Tidal prism

The volume of water moving past a fixed cross section during each flood tide or ebb tide (i.e. slack water to slack water), is referred to as the tidal prism of an estuary.

The following table shows the measured tidal prism at the location specified, along with the tidal range for near the measurement site and at Sydney Harbour.

Location:     500m upstream from the entrance on 9/7/80

Tide stateFlow
(106 m3
tidal range (m)
Sydney Harbour
tidal range (m)
Ebb flow2.941.451.5
Flood flow 3.251.551.4

Tidal survey

Tidal surveys measure the hydrodynamic behaviour of an estuary during a full tidal cycle. The parameters measured include velocity, water levels, salinity, temperature and pH.

The following tidal surveys have been undertaken on this estuary. A map shows the location and plots of the flows and water levels for the most comprehensive survey.

Copies of tidal survey reports are available from the Estuary Management Program

DateData collectedFigureReport
Jul 1980Current metering at one line, water levels at three locations (ocean, metering line and estuary).1988-08.pdfMHL308

Hydrographic survey

The hydrographic survey provides the depth and physical characteristics of the estuary.

The metadata associated with the survey can be found on the map sheets provided.

Map sheet number DescriptionScale    Size
56687s01.pdfIndex plan, tidal planes & cross section locations1:10000903kb
56687s02.pdfSandon River entrance1:1000509kb
56687s03.pdfSandon River lower estuary1:20001025kb
56687s04.pdfSandon River mid estuary1:2000446kb
56687s05.pdfCross sections - Sandon River1:1000 H 1:200 V192kb
56687s06.pdfCross sections - Sandon River1:1000 H 1:200 V180kb
56687s07.pdfCross sections - Sandon River1:1000 H 1:200 V180kb
56687s08.pdfCross sections - Sandon River1:1000 H 1:200 V179kb
56687s09.pdfCross sections - Sandon River & Toumbaal Creek1:1000 H 1:200 V183kb
56687s10.pdfCross sections - Toumbaal Creek1:1000 H 1:200 V192kb 
56687s11.pdfCross sections - Toumbaal Creek1:1000 H 1:200 V 184kb 
56687s12.pdfCross sections - Toumbaal Creek & Candole Creek 1:1000 H 1:200 V 188kb 
56687s13.pdfCross sections - Candole Creek1:1000 H 1:200 V 198kb
56687s14.pdfCross sections - Candole Creek & Unnamed Creeks 1 & 21:1000 H 1:200 V 192kb
56687.txtSandon River xyz dataN/A294kb
Page last updated: 03 February 2012