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Pre-development denudation rates for the Great Barrier Reef catchments derived using Be-10
- Publication Year :
- 2021
- Publisher :
- Elsevier, 2021.
-
Abstract
- Understanding of the pre-development, baseline denudation rates that deliver sediment to the Great Barrier Reef (GBR) has been elusive. Cosmogenic 10Be in sediment is a useful integrator of denudation rates and sediment yields averaged over large spatial and temporal scales. This study presents 10Be data from 71 sites across 11 catchments draining to the GBR: representing 80% of the GBR catchment area and provide background sediment yields for the region. Modern, short-term, sediment yields derived from suspended load concentrations are compared to the 10Be data to calculate an Accelerated Erosion Factor (AEF) that highlights denudation "hot-spots" where sediment yields have increased over the long-term background values. The AEF results show that 58% basins have higher modern sediment yields than long-term yields. The AEF is considered a useful approach to help prioritise on-ground investments in remediation and the additional measured empirical data in this paper will help support future predictive models.
- Subjects :
- Geologic Sediments
Environmental remediation
Environmental Sciences & Ecology
Aquatic Science
Oceanography
(10)Be
Great barrier reef
SITU-PRODUCED BE-10
Marine & Freshwater Biology
Cosmogenic nuclide
Temporal scales
Baseline (configuration management)
EROSION RATES
Be-10
Hydrology
Science & Technology
LAND-USE
COSMOGENIC NUCLIDES
Sediment yield
Sediment
ESCARPMENT RETREAT
Denudation
Pollution
MOUNTAIN EROSION
Marine Biology & Hydrobiology
WATER-QUALITY
Erosion
Environmental science
Suspended load
BURDEKIN RIVER
SEDIMENT PRODUCTION
Reef plan
DRY-TROPICAL CATCHMENT
Life Sciences & Biomedicine
Environmental Sciences
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....fb62985d3188da5e0b5906172ff24f67