Flood Water Surface Profiles for North Esk and Tamar Rivers

Encompassing flood water surface profiles for the North Esk and Tamar rivers in Tasmania, Australia, derived from hydrological studies. It includes profiles for 100-year and 200-year Average Recurrence Interval (ARI) events, with discharges calibrated against historical floods from 2005 and 2011. The data is intended for planning purposes and incorporates scenarios with current sea levels and an 800mm sea level rise.

Use Cases

• Model flood inundation extents for the North Esk river using the 100-year ARI profile with current sea level conditions.
• Assess climate change impact on flood risk by comparing the standard 100-year ARI profile with the profile incorporating an 800mm sea level rise.
• Calibrate hydrological models using the documented North Esk flood discharges for events like the 470 cumecs peak in August 2005.
• Analyze flood level variability by comparing profiles derived from North Esk discharges with those influenced by South Esk discharges into the Tamar.

Strengths

• Hydrological models were calibrated against two recorded flood events (August 2005 at 470 cumecs and June 2011 at 251 cumecs).
• Includes specific flood return period data, such as discharges for 10, 20, 50, 100, and 500-year ARI events.
• Profiles account for a specific sea level rise scenario of 800mm for climate impact assessment.

Limitations

• The spatial coverage is limited to specific river reaches from Black Bridge to Corra Linn on the North Esk and the Tamar confluence.
• The underlying hydrological studies for the North and South Esk rivers were conducted in 2006 and 2008, respectively, which may not reflect current conditions.
• Sample data and specific column definitions for the provided file formats (CSV, GeoJSON) are unavailable for review.

Provenance

Source

City of Launceston Open Data, authored by lccspatial.

Collection Method

Hydrological modelling commissioned from Hydro Consulting (South Esk) and the University of New South Wales Water Research Laboratory (North Esk).

Time Range

Hydrological studies from 2006 and 2008; model calibration uses flood events from 2005 and 2011.

Freshness

The dataset metadata was last updated in March 2026, but the core hydrological studies date from 2006-2008.

Geography

North Esk River from Black Bridge to Corra Linn, and the Tamar River estuary near Launceston, Tasmania, Australia.