Environmental issues

Water

Nambucca River

Physical characteristics

Entrance
location
Latitude (ºS) -30.65
Longitude (ºE) 153.01
Catchment area (km2)1 1298.9
Estuary area (km2)1,2 12.6
Estuary volume (ML)3 23227.1
Average depth (m)4 2.0
Roy et al. (2001) classification5 III/5/D
Entrance condition6 O/T
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:     4.7km upstream from the entrance on 27/9/99

Tide state Flow
(106 m3
Local
tidal range (m)
Sydney Harbour
tidal range (m)
Ebb flow 5.24 0.64 1.18
Flood flow  3.96 0.68 1.12

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

Date Data collected Figure Report
Jun 1977 Current metering at three lines near entrance: velocity, discharge, three tideboards, cross sections, sediment samples, bed samples and photos. - MHL243
May 1979 Current metering 2km from entrance, on three lines, four tideboards, temp/salinity and suspended sediment. - MHL277
Dec 1979 Current metering at four lines and water levels from ten tideboards, thalweg and cross section echo sounding, temperature/salinity readings, photos. - MHL457
Sep 1999 Extensive data collection: water levels at fourteen sites, velocities at nine sites, in situ water quality at three sites and water quality profiles at twenty-four sites. 1988-16.pdf MHL1025
Feb 1999 to Feb 2000 Nambucca River (Macksville) Water Quality Monitoring. - MHL1050

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.

(Swimming Creek is a small estuary located to the north of the Nambucca River)

Map sheet number  Description Scale     Size
56594s01.pdf Swimming Creek 1:500 220kb
56594.txt Swimming Creek xyz data N/A 10kb
56686s01.pdf Nambucca River Index plan 1:25000 1033kb
56686s02.pdf  Cross section location plan 1:10000  675kb
56686s03.pdf Cross section location plan 1:10000 642kb
56686s04.pdf Cross section location plan 1:10000 507kb
56686s05.pdf Nambucca River entrance 1:2000 1282kb
56686s06.pdf Nambucca River entrance 1:2000 1251kb
56686s07.pdf Nambucca River & Warrell Creek lower estuary 1:2000 892kb
56686s08.pdf Nambucca River & Warrell Creek lower estuary 1:2000 561kb
56686s09.pdf Nambucca River mid estuary  1:2000 500kb
56686s10.pdf Nambucca River mid estuary 1:2000 372kb
56686s11.pdf Nambucca River mid estuary 1:2000 505kb
56686s12.pdf Nambucca River & Newee Creek 1:2000 391kb
56686s13.pdf Junction of Nambucca River, Taylors Arm & Blackbutt Creek 1:2000 369kb
56686s14.pdf Nambucca River & Taylors Arm 1:2000 456kb
56686s15.pdf Warrell Creek 1:2000 295kb
56686s16.pdf Warrell Creek 1:2000 278kb
56686s17.pdf Warrell Creek 1:2000 325kb
56686s18.pdf Warrell Creek 1:2000 306kb
56686s19.pdf Cross sections - Nambucca River 1:1000 H 1:200 V 250kb
56686s20.pdf Cross sections - Nambucca River 1:1000 H 1:200 V 246kb
56686s21.pdf Cross sections - Nambucca River 1:1000 H 1:200 V 254kb
56686s22.pdf Cross sections - Nambucca River 1:1000 H 1:200 V 230kb
56686s23.pdf Cross sections - Nambucca River 1:1000 H 1:200 V 218kb
56686s24.pdf Cross sections - Nambucca River 1:1000 H 1:200 V 210kb
56686s25.pdf Cross sections - Nambucca River 1:1000 H 1:200 V 224kb
56686s26.pdf Cross sections - Nambucca River & Taylors Arm 1:1000 H 1:200 V 227kb
56686s27.pdf Cross sections - Taylors Arm  1:1000 H 1:200 V 234kb
56686s28.pdf Cross sections - Taylors Arm 1:1000 H 1:200 V 222kb
56686s29.pdf Cross sections - Taylors Arm 1:1000 H 1:200 V 232kb
56686s30.pdf Cross sections - Taylors Arm 1:1000 H 1:200 V 218kb
56686s31.pdf Cross sections - Taylors Arm 1:1000 H 1:200 V 216kb
56686s32.pdf Cross sections - Taylors Arm 1:1000 H 1:200 V 205kb
56686s33.pdf Cross sections - Taylors Arm 1:1000 H 1:200 V 207kb
56686s34.pdf Cross sections - Taylors Arm & Warrell Creek 1:1000 H 1:200 V 182kb
56686s35.pdf Cross sections - Warrell Creek 1:1000 H 1:200 V 193kb
56686s36.pdf Cross sections - Warrell Creek 1:1000 H 1:200 V 213kb
56686s37.pdf Cross sections - Warrell Creek 1:1000 H 1:200 V 200kb
56686s38.pdf Cross sections - Warrell Creek 1:1000 H 1:200 V 224kb
56686s39.pdf Cross sections - Warrell Creek 1:1000 H 1:200 V 229kb
56686s40.pdf Cross sections - Warrell Creek 1:1000 H 1:200 V 220kb
56686s41.pdf Cross sections - Warrell Creek 1:1000 H 1:200 V 212kb
56686s42.pdf Cross sections - Warrell Creek & Newee Creek 1:1000 H 1:200 V 199kb
56686s43.pdf Cross sections - Newee Creek 1:1000 H 1:200 V 180kb
56686s44.pdf Cross sections - Newee Creek, Rhones Creek, Snakey Creek & Blackbutt Creek 1:1000 H 1:200 V 195kb
56686s45.pdf Cross sections - Blackbutt Creek, Broadwater, Unnamed Creeks 1 & 2 1:1000 H 1:200 V 226kb
56686s46.pdf Cross sections - Unnamed Creeks 2, 3, 4 & 5 1:1000 H 1:200 V 217kb
56686s47.pdf Cross sections - Unnamed Creeks 5, 6, 7, 8 and Way Way Creek 1:1000 H 1:200 V 208kb
56686s48.pdf Cross sections - Way Way Creek, Welshs Creek & Wirrimbi Channel 1:1000 H 1:200 V 139kb
56686.txt  Nambucca River xyz data  N/A 1051kb
Page last updated: 01 February 2012