Seawater Interface Depth Contours for Esperance Superficial Aquifer

Geospatial contours show the depth to the seawater interface in meters below groundwater level for the Esperance area's Superficial Aquifer. The dataset is derived from an assessment of monitoring data collected from November 2020 to November 2021, incorporating 2016 airborne electromagnetic survey interpretations. It is part of the Statewide Seawater Interface Project funded by the Government of Western Australia.

Use Cases

• Model seawater intrusion risk by analyzing the spatial distribution of seawater interface depth contours.
• Assess seasonal and tidal influences on the seawater interface location using data from the 2020-2021 monitoring period.
• Integrate airborne electromagnetic survey data from 2016 with recent groundwater level and chemistry measurements for coastal aquifer studies.
• Support groundwater management by mapping the mixing zone between fresh and saline groundwater in the Superficial Aquifer.

Strengths

• Derived from a multi-year project running from April 2020 to March 2023, ensuring a sustained data collection effort.
• Incorporates data from multiple sources including direct monitoring bores, downhole logging, groundwater chemistry, and a 2016 airborne electromagnetic survey.
• Part of a formal State Groundwater Investigation Program, documented in report HR437.

Limitations

• The location of the seawater interface contours can change due to factors like abstraction and recharge, indicating dynamic conditions not fully captured by a static snapshot.
• Specific quantitative details like row count, sample size, or measurement density are not provided in the input.

Provenance

Source

Department of Water and Environmental Regulation, Government of Western Australia.

Collection Method

Derived from an assessment of seawater interface monitoring bores, downhole logging, continuous groundwater level measurements, electrical conductivity profiling, groundwater chemistry, and airborne electromagnetic survey data.

Time Range

Primary assessment period: November 2020 to November 2021. Project period: April 2020 to March 2023. Includes 2016 survey data.

Freshness

Data was last updated in March 2026, but the primary assessment period is November 2020 to November 2021.

Geography

Esperance groundwater area, Western Australia.