Seawater Interface Depth Superficial Aq: Esperance Area Contours (DWER-134)

This dataset shows the geographic location and depth to the seawater interface (SWI) in metres below groundwater level (mBGWL) in the Superficial Aquifer, in the Esperance groundwater area.

This dataset is a derived location based on an assessment of data for the period November 2020 to November 2021. The 2016 Interpretation of TEMPEST Airbourne Electromagnetic Data from Esperance (Mira Geoscience) was also used in creating this dataset. This location can change pending known factors that impact the location of the seawater interface including the time of year, tidal movements, abstraction, recharge and throughflow.

The full assessment of the SWI in this area is documented in report HR437 Esperance Seawater Interface Priority Area Assessment.

This dataset is sourced from the Statewide Seawater Interface Project, funded by the Government of Western Australia under the State Groundwater Investigation Program.

In the Esperance area, the project runs from April 2020 to March 2023 and the data are collected from:
- Seawater interface monitoring (SWIM) bores installed or owned by the department - Downhole natural gamma and induction logging - Installation of data loggers and continuous static groundwater level (SWL) measurements from data loggers - Electrical conductivity (EC) depth profiling - Groundwater chemistry sampling. - Airborne electromagnetic (AEM) survey.
The above data that is owned by the department can be downloaded from the Water Information Reporting (WIR) Portal or by contacting the Department. AEM survey data can be downloaded via the interactive geological map tool GeoVIEW.WA from the Department of Mines, Industry Regulation and Safety.

Information on the SWI project can be found on the Western Australia State Government website (www.wa.gov.au).