Myall River

Physical characteristics

Latitude (ºS)-32.67
Longitude (ºE)152.15
Catchment area (km2)1818.7
Estuary area (km2)1,2115.2
Estuary volume (ML)3448257.7
Average depth (m)44.0
Roy et al. (2001) classification5V/11/C
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:     total flow east and west channel of Corrie Island on 24/9/09

Tide stateFlow
(106 m3
tidal range (m)
Sydney Harbour
tidal range (m)
Ebb flow4.821.141.02
Flood flow 5.311.131.02

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
Jan 1972Velocities and water levels at Tea Gardens. Metering abandoned shortly after commencement.-MHL622
Oct 1975Current metering at three lines, seven tideboards, velocities and float tracking. Metering abandoned due to inclement weather and instrument malfunction. No useful data obtained.-MHL350
Nov 1977Current metering at four lines - velocities, discharge, cross sections, seven tideboards, temperature/salinity, photographs and suspended sediments.-MHL227
Sep 1993Current metering at entrance line 200m upstream of Corrie Island - velocities and discharge.-MHL716
Jun 1996 to Mar 1998Myall Lake/River Water Quality Monitoring 1998.-MHL906
Sep 2008 to Feb 2009Water level data at four sites and conductivity/salinity data at four sites. Two sets of water quality profiles at fourteen sites.-MHL1943
Sep 2009Data collection: water level data at six sites; velocity data at six sites; and conductivity/salinity data at five sites.1988-25.pdfMHL1943

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
54797s01.pdfIndex plan1:50000464.9kb
54797s02.pdfIndex plan & cross section locations1:100001120.5kb
54797s03.pdfIndex plan & cross section locations1:10000236.7kb
54797s04.pdfIndex plan & cross section locations1:10000358.2kb
54797s05.pdfIndex plan & cross section locations1:10000463.4kb
54797s06.pdfIndex plan1:15000523.7kb
54797s07.pdfLegends, notes, tidal planes & datum diagram1:50000512.3kb
54797s08.pdfCorrie Creek1:1000294.1kb
54797s09.pdfCorrie Creek & Myall River1:1000326.9kb
54797s10.pdfMyall River & Port Stephens1:1000438.3kb
54797s11.pdfMyall River1:1000400.3kb
54797s12.pdfMyall River1:1000409.3kb
54797s13.pdfMyall River1:1000416.7kb
54797s14.pdfMyall River (Witts Island)1:1000283.3kb
54797s15.pdfMyall River & Bombah Broadwater1:1000174.4kb
54797s16.pdfNerong Creek, Myall River & Bombah Broadwater1:1000125.9kb
54797s17.pdfNerong Creek1:1000124.5kb
54797s18.pdfBoolambayte Lake & Bombah Broadwater1:1000190.2kb
54797s19.pdfBoolambayte Lake & Violet Hill Passage1:1000181.9kb
54797s20.pdfMyall River & Swan Bay1:2000345.3kb
54797s21.pdfMyall River (Dredge Island)1:2000243.8kb
54797s22.pdfWobbegong Bay1:2500201.1kb
54797s23.pdfPindimar Bay (Corrie Island)1:2500473.1kb
54797s24.pdfPort Stephens1:2500590.5kb
54797s25.pdfPort Stephens1:2500584.0kb
54797s26.pdfPort Stephens1:2500740.2kb
54797s27.pdfPort Stephens1:2500695.6kb
54797s28.pdfNerong Creek & Bombah Broadwater1:5000391.3kb
54797s29.pdfBombah Broadwater1:5000489.6kb
54797s30.pdfBombah Broadwater1:5000489.3kb
54797s31.pdfBoolambayte Lake1:5000716.9kb
54797s32.pdfBoolambayte Lake & Myall Lake1:5000643.3kb
54797s33.pdfBoolambayte Lake1:5000464.7kb
54797s34.pdfMyall Lake1:5000571.0kb
54797s35.pdfMyall Lake1:5000712.1kb
54797s36.pdfMyall Lake1:5000541.1kb
54797s37.pdfMyall Lake & Russells Bay1:5000525.4kb
54797s38.pdfMyall Lake & Kataway Bay1:5000473.7kb
54797s39.pdfMyall Lake & Corrigans Bay1:5000498.1kb
54797s40.pdfCross sections - Myall River1:1000 H 1:200 V160.2kb
54797s41.pdfCross sections - Myall River1:1000 H 1:200 V187.6kb
54797s42.pdfCross sections - Myall River1:1000 H 1:200 V170.5kb
54797s43.pdfCross sections - Myall River1:1000 H 1:200 V154.7kb
54797s44.pdfCross sections - Pipers Creek1:1000 H 1:200 V121.7kb
54797.txtMyall River & Lakes xyz dataN/A2789.7kb
56531s01.pdfMyall River entrance1:2000998kb
56531s02.pdfMyall River entrance1:20001070kb
56531s03.pdfMyall River entrance and Port Stephens1:20001114kb
56531.txtMyall River entrance xyz dataN/A321kb
Page last updated: 27 April 2012