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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.


Related in: MedlinePlus

Spatiotemporal model of hypoxia in the Severn River 2011.
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fig0030: Spatiotemporal model of hypoxia in the Severn River 2011.

Mentions: The 2011 DVR spatiotemporal model for the Severn River at 0 km to 8 km is at or above 5 mgl−1 (Fig. 6). At distances 2 to 6 km the dissolved oxygen volume become hypoxic from 5 m to 9 m (bottom) at week 26 through 28, then increasing during the year. At distances of 12 to 18 km the evolution of hypoxic conditions are found at weeks 28 to 36 at the bottom (5 m) coming up to the surface (1m). Anoxic volume are located at distance of 14 to 18 km from weeks 28 to 36 from the bottom (9 m) coming up to the surface (1 m). The spatiotemporal hypoxic volume calculated was 28.5% for 5 mgl−1, 44.5% for 2.0 mgl−1, and anoxic volume as 27% for 0.2 mgl−1. The anoxic volume is located in the shallows of the Severn River and is not only located in the main channel deep sections. This DVR of the Severn River shows that no Chesapeake Bay hypoxic or anoxic water is entering the sub-estuary and that the hypoxic-anoxic conditions develop within this tidal creek.


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 Severn River 2011.
© Copyright Policy - CC BY-NC-ND
Related In: Results  -  Collection

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

fig0030: Spatiotemporal model of hypoxia in the Severn River 2011.
Mentions: The 2011 DVR spatiotemporal model for the Severn River at 0 km to 8 km is at or above 5 mgl−1 (Fig. 6). At distances 2 to 6 km the dissolved oxygen volume become hypoxic from 5 m to 9 m (bottom) at week 26 through 28, then increasing during the year. At distances of 12 to 18 km the evolution of hypoxic conditions are found at weeks 28 to 36 at the bottom (5 m) coming up to the surface (1m). Anoxic volume are located at distance of 14 to 18 km from weeks 28 to 36 from the bottom (9 m) coming up to the surface (1 m). The spatiotemporal hypoxic volume calculated was 28.5% for 5 mgl−1, 44.5% for 2.0 mgl−1, and anoxic volume as 27% for 0.2 mgl−1. The anoxic volume is located in the shallows of the Severn River and is not only located in the main channel deep sections. This DVR of the Severn River shows that no Chesapeake Bay hypoxic or anoxic water is entering the sub-estuary and that the hypoxic-anoxic conditions develop within this tidal creek.

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