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Resolving spatiotemporal characteristics of the seasonal hypoxia cycle in shallow estuarine environments of the Severn River and South River, MD, Chesapeake Bay, USA

View Article: PubMed Central - PubMed

ABSTRACT

The nature of emerging patterns concerning water quality stressors and the evolution of hypoxia within sub-estuaries of the Chesapeake Bay has been an important unresolved question among the Chesapeake Bay community. Elucidation of the nature of hypoxia in the tributaries of the Chesapeake Bay has important ramifications to the successful restoration of the Bay, since much of Bay states population lives within the watersheds of the tributaries. Very little to date, is known about the small sub-estuaries of the Chesapeake Bay due to limited resources and the difficulties in resolving both space and time dimensions on scales that are adequate to resolve this question. We resolve the spatio-temporal domain dilemma by setting up an intense monitoring program of water quality stressors in the Severn and South Rivers, MD. Volume rendered models were constructed to allow for a visual dissection of the water quality times series which illustrates the life cycle of hypoxia and anoxia at the mid to upper portions of the tidal tributaries. The model also shows that unlike their larger Virginian tributary counterparts, there is little to no evidence of severe hypoxic water intrusions from the main-stem of the Chesapeake Bay into these sub-estuaries.

No MeSH data available.


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Spatiotemporal model of hypoxia in the South River 2010.
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fig0025: Spatiotemporal model of hypoxia in the South River 2010.

Mentions: The South River DVR model for dissolved oxygen indicates that the volume is 5.0 mgl−1 or better at the mouth for the entire life cycle of 2010 (Fig. 5). The spatiotemporal severe hypoxia does not develop until week 30 at a distance of 10 km at a depth of 5 m. Anoxia develops primarily in the deep-water section near 9 km. The spatiotemporal hypoxic volume showed that 71% of the was at or above the 5 mgl−1, while 14% was below the 2.0 mgl−1, 7.2% was at 2 mgl−1, and 0.02% for 0.2 mgl−1.


Resolving spatiotemporal characteristics of the seasonal hypoxia cycle in shallow estuarine environments of the Severn River and South River, MD, Chesapeake Bay, USA
Spatiotemporal model of hypoxia in the South River 2010.
© Copyright Policy - CC BY-NC-ND
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5037264&req=5

fig0025: Spatiotemporal model of hypoxia in the South River 2010.
Mentions: The South River DVR model for dissolved oxygen indicates that the volume is 5.0 mgl−1 or better at the mouth for the entire life cycle of 2010 (Fig. 5). The spatiotemporal severe hypoxia does not develop until week 30 at a distance of 10 km at a depth of 5 m. Anoxia develops primarily in the deep-water section near 9 km. The spatiotemporal hypoxic volume showed that 71% of the was at or above the 5 mgl−1, while 14% was below the 2.0 mgl−1, 7.2% was at 2 mgl−1, and 0.02% for 0.2 mgl−1.

View Article: PubMed Central - PubMed

ABSTRACT

The nature of emerging patterns concerning water quality stressors and the evolution of hypoxia within sub-estuaries of the Chesapeake Bay has been an important unresolved question among the Chesapeake Bay community. Elucidation of the nature of hypoxia in the tributaries of the Chesapeake Bay has important ramifications to the successful restoration of the Bay, since much of Bay states population lives within the watersheds of the tributaries. Very little to date, is known about the small sub-estuaries of the Chesapeake Bay due to limited resources and the difficulties in resolving both space and time dimensions on scales that are adequate to resolve this question. We resolve the spatio-temporal domain dilemma by setting up an intense monitoring program of water quality stressors in the Severn and South Rivers, MD. Volume rendered models were constructed to allow for a visual dissection of the water quality times series which illustrates the life cycle of hypoxia and anoxia at the mid to upper portions of the tidal tributaries. The model also shows that unlike their larger Virginian tributary counterparts, there is little to no evidence of severe hypoxic water intrusions from the main-stem of the Chesapeake Bay into these sub-estuaries.

No MeSH data available.


Related in: MedlinePlus