Pre-development denudation rates for the Great Barrier Reef catchments derived using Be-10
File(s)
Accepted version
Author(s)
Type
Journal Article
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.
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.
Date Issued
2021-11-01
Date Acceptance
2021-07-13
Citation
Marine Pollution Bulletin, 2021, 172, pp.1-20
ISSN
0025-326X
Publisher
Elsevier
Start Page
1
End Page
20
Journal / Book Title
Marine Pollution Bulletin
Volume
172
Copyright Statement
© 2021 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000701679700005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Life Sciences & Biomedicine
Environmental Sciences
Marine & Freshwater Biology
Environmental Sciences & Ecology
Great barrier reef
Sediment yield
Reef plan
Cosmogenic nuclides
Denudation
Be-10
DRY-TROPICAL CATCHMENT
SITU-PRODUCED BE-10
COSMOGENIC NUCLIDES
EROSION RATES
WATER-QUALITY
BURDEKIN RIVER
LAND-USE
SEDIMENT PRODUCTION
ESCARPMENT RETREAT
MOUNTAIN EROSION
Publication Status
Published
Article Number
ARTN 112731
Date Publish Online
2021-08-25