Environmental issues

Water

Port Hacking

Physical characteristics

Entrance
location
Latitude (ºS)-34.07
Longitude (ºE)151.16
Catchment area (km2)1165.3
Estuary area (km2)1,211.7
Estuary volume (ML)3105261.5
Average depth (m)49.1
Roy et al. (2001) classification5II/3/A
Entrance condition6O
Notes:
  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:     2.25km from the entrance on 15/3/78

Tide stateFlow
(106 m3
Local
tidal range (m)
Sydney Harbour
tidal range (m)
Ebb flow5.530.60.6
Flood flow 6.980.670.7

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
Mar 1978Current metering at five lines and two tideboards, velocities, discharge, temperature and salinity, cross sections, bed and suspended sediment samples.1988-39.pdfMHL233
Mar 1979Current metering at Lilli Pilli at one line and one spot.-MHL373
Sep 1979Current metering at one line (repeat of 14/3/79).-MHL374
Feb 1980Current metering at two lines, six tideboards, temp/salinity and suspended sediment.-MHL305
Feb 1980Float tracking - maximum velocities on two flood and two ebb tides.-MHL305
Jun 1981Current metering at one line and four tideboards.-MHL316

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
55471s01.pdfIndex plan1:4000506.0kb
55471s02.pdfPort Hacking (Lilli Pilli)1:1000779.7kb
55471s03.pdfPort Hacking (Lilli Pilli Point)1:1000664.1kb
55471s04.pdfPort Hacking (Little Turriell Bay)1:1000506.6kb
55471s05.pdfPort Hacking (Burraneer Bay)1:1000635.7kb
55471s06.pdfPort Hacking (Gunnamatta Bay)1:1000307.1kb
55471s07.pdfPort Hacking (Deeban Spit)1:1000640.2kb
55471s08.pdfPort Hacking (Hungry Point)1:10001008.8kb
55471.txtPort Hacking xyz dataN/A486.4kb
Page last updated: 27 April 2012