NSW Environment Protection Authority Post-Flood River Surveys 2022-23

Hydrographic data (multibeam or singlebeam) and estuary-river bed imagery (side-scan) collected to identify river-bed hazards in targeted sections of 13 New South Wales (NSW) coastal rivers/estuaries following significant 2021-22 flood events for the state's Environment Protection Authority. Surveys were completed under contract by two commercial survey companies Hydrographic & Cadastral Survey (H&C) and SandMap, during 2022-23 as primarily target detection with hydrographic depth determination for safety of navigation, a secondary requirement. SandMap surveys covered sections of the Bellinger-Kalang, Clarence, Nambucca, Richmond, Tweed and Wilson rivers. H&C Survey surveys covered sections of Woronora, Shoalhaven, Camden Haven, Hastings, Macleay, Manning and Hawkesbury rivers. Surveys were completed to identify the location of potential in-river navigational hazards and/or potential sources of environmental harm or pollution following significant flood events within NSW 2021 and 2022. Although the vertical and horizontal precision and accuracy is expected to be high, the user should understand how the data are collected and the horizontal and vertical uncertainties inherent in the data and products (see reports). The data provided here are deemed 'Not for Navigation'. Funding was provided under the joint Commonwealth-State Disaster Recovery Funding Arrangements for the flood recovery program and survey contracts were awarded following a tender process. Final data packages, output products and survey reports were provided by end of the financial year 2022-23 and have been backed up on DPE Environment and Heritage groups Science Data Compute facility.