Impact of catchment-derived nutrients and sediments on marine water quality on the Great Barrier Reef: An application of the eReefs marine modelling system

MARINE POLLUTION BULLETIN

卷:167

Article

Baird, Mark E.¹  Mongin, Mathieu¹  Skerratt, Jennifer¹  Margvelashvili, Nugzar¹  Tickell, Sharon¹  Steven, Andrew D. L.¹  Robillot, Cedric⁵  Ellis, Robin⁴  Waters, David⁴  Kaniewska, Paulina³  Brodie, Jon² 

[1] CSIRO Oceans & Atmosphere, Hobart, Tas 7001, Australia

[2] James Cook Univ, Townsville, Qld 4811, Australia

[3] Queensland Govt, Dept Environm & Sci, Off Great Barrier Reef, Brisbane, Qld, Australia

[4] Queensland Govt, Sci Div, Dept Environm & Sci, Brisbane, Qld, Australia

[5] Great Barrier Reef Fdn, Brisbane, Qld, Australia

关键词: Great Barrier Reef;    Suspended sediments;    Chlorophyll concentration;    Water clarity;   

DOI  :  10.1016/j.marpolbul.2021.112297

来源: Elsevier

【 摘 要 】

Water quality of the Great Barrier Reef (GBR) is determined by a range of natural and anthropogenic drivers that are resolved in the eReefs coupled hydrodynamic - biogeochemical marine model forced by a process-based catchment model, GBR Dynamic SedNet. Model simulations presented here quantify the impact of anthropogenic catchment loads of sediments and nutrients on a range of marine water quality variables. Simulations of 2011-2018 show that reduction of anthropogenic catchment loads results in improved water quality, especially within river plumes. Within the 16 resolved river plumes, anthropogenic loads increased chlorophyll concentration by 0.10 (0.02-0.25) mg Chl m(-3). Reductions of anthropogenic loads following proposed Reef 2050 Water Quality Improvement Plan targets reduced chlorophyll concentration in the plumes by 0.04 (0.01-0.10) mg Chl m(-3). Our simulations demonstrate the impact of anthropogenic loads on GBR water quality and quantify the benefits of improved catchment management.

【 授权许可】

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