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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

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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 2011.
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fig0035: Spatiotemporal model of hypoxia in the South River 2011.

Mentions: Conversely, the DVR model for the South River in 2011 shows dissolved oxygen between 0 km to 15 km from weeks 15 to 25 the dissolved oxygen is at or above 5 mgl−1 (Fig. 7). Spatiotemporal hypoxia is found during weeks 25 to 40 only toward the bottom depth. The spatiotemporal dissolved oxygen volumes calculated was 92.6% at or above 5 mgl−1, 7% for 2 mgl−1, and 0.32% for 0.2 mgl−1. The South River did not have any evidence of hypoxic water entering from the Chesapeake Bay, and the hypoxic conditions that evolved were localized within this system.


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

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

fig0035: Spatiotemporal model of hypoxia in the South River 2011.
Mentions: Conversely, the DVR model for the South River in 2011 shows dissolved oxygen between 0 km to 15 km from weeks 15 to 25 the dissolved oxygen is at or above 5 mgl−1 (Fig. 7). Spatiotemporal hypoxia is found during weeks 25 to 40 only toward the bottom depth. The spatiotemporal dissolved oxygen volumes calculated was 92.6% at or above 5 mgl−1, 7% for 2 mgl−1, and 0.32% for 0.2 mgl−1. The South River did not have any evidence of hypoxic water entering from the Chesapeake Bay, and the hypoxic conditions that evolved were localized within this system.

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