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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.


Spatiotemporal model of salinity in the Severn River 2010.
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fig0055: Spatiotemporal model of salinity in the Severn River 2010.

Mentions: The spatiotemporal direct volume rendering (DVR) model shows weak to moderate stratification, especially in the deeper sections of the Severn River, with a halocline between 3–5 meters. The surface freshwater input into the Sever River does not extend far into this portion of the tidal system. Hence, this drives a very weak salinity gradient causing a weak circulation resulting in a partially mixed to well mixed estuary depending on the time of the year and position within the estuary (Fig. 11). The temporal DVR pattern shows that salinity increase over time through the late spring into early fall (9–10 PSU)


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 salinity in the Severn River 2010.
© Copyright Policy - CC BY-NC-ND
Related In: Results  -  Collection

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

fig0055: Spatiotemporal model of salinity in the Severn River 2010.
Mentions: The spatiotemporal direct volume rendering (DVR) model shows weak to moderate stratification, especially in the deeper sections of the Severn River, with a halocline between 3–5 meters. The surface freshwater input into the Sever River does not extend far into this portion of the tidal system. Hence, this drives a very weak salinity gradient causing a weak circulation resulting in a partially mixed to well mixed estuary depending on the time of the year and position within the estuary (Fig. 11). The temporal DVR pattern shows that salinity increase over time through the late spring into early fall (9–10 PSU)

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.