Seven benthic incubation chambers deployed at four sites in Port Phillip Bay measured bio-irrigation using deuterium and caesium tracers. Modelling from Geoscience Australia indicates advection rates between 150 and 700 mL h-1 to depths of 20-50 cm. The data reveals regional consistency in irrigation rates within similar sediment types but variation across different areas of the bay.
Use Cases
- Modeling non-diffusive solute transport across the sediment-water interface based on tracer incubation time plots
- Estimating bio-irrigation depth and rate for different bay regions based on sediment type and infauna distribution
- Assessing pore-water advection and its impact on bay-wide water column turnover, mentioned as within 200 days at lower rates
- Comparing the effectiveness of deuterium versus dissolved caesium as tracers for bio-irrigation, noting adsorption uncertainty with caesium
Strengths
- Data is derived from seven incubation chambers across four sites, providing multiple measurement points
- Modelling provides specific quantitative ranges for irrigation rates (150-700 mL h-1) and depths (20-50 cm)
- Findings show consistency within regions, suggesting reliable spatial patterns for defined sediment types
Limitations
- Column-level documentation is absent; field semantics must be inferred after download
- Row count is unknown, which may limit suitability assessment for statistical modeling
- The description notes increased uncertainty in model results when using dissolved caesium due to adsorption onto sediment particles
Provenance
- Source
- Geoscience Australia Data
- Collection Method
- Deployment of deuterium-enriched tracer in benthic incubation chambers on the sea floor, with modelling of results.
- Time Range
- null
- Freshness
- Last updated 2026-04-20 01:23:29.799698; freshness should be verified
- Geography
- Port Phillip Bay, Australia