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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.


Location of the Lower-Western shore tributaries of the upper Chesapeake Bay, which contains the Magothy (a), Severn (b), South (c) and Rhode-West Rivers (d).
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fig0005: Location of the Lower-Western shore tributaries of the upper Chesapeake Bay, which contains the Magothy (a), Severn (b), South (c) and Rhode-West Rivers (d).

Mentions: The study area includes the tidal portions of the Severn and South Rivers, which are tributaries of the Chesapeake Bay, located on Maryland's Lower Western Shore (Fig. 1). The South and Severn Rivers have numerous tidal creeks forming a typical dendritic pattern that resembles most low sediment discharge coastal plain estuaries. The bathymetry of the Severn and South Rivers are similar by the fact each river contains a deeper middle section, with shallower mouths and headwaters. These rivers are different in that the Severn River is deeper at the mouth and about 5 meters deeper at its mid-section vs South River. In the Severn River there is a unique bowl shaped geomorphic feature, this is called Round Bay and is represented by stations RBS (Round Bay South), SRN 5 (middle section of Round Bay), and RBN (Round Bay North). A shallow sill exists at either end of Round Bay constricting flow in the area. Located at the mouth of both rivers shallow sills exist.


Resolving spatiotemporal characteristics of the seasonal hypoxia cycle in shallow estuarine environments of the Severn River and South River, MD, Chesapeake Bay, USA
Location of the Lower-Western shore tributaries of the upper Chesapeake Bay, which contains the Magothy (a), Severn (b), South (c) and Rhode-West Rivers (d).
© Copyright Policy - CC BY-NC-ND
Related In: Results  -  Collection

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

fig0005: Location of the Lower-Western shore tributaries of the upper Chesapeake Bay, which contains the Magothy (a), Severn (b), South (c) and Rhode-West Rivers (d).
Mentions: The study area includes the tidal portions of the Severn and South Rivers, which are tributaries of the Chesapeake Bay, located on Maryland's Lower Western Shore (Fig. 1). The South and Severn Rivers have numerous tidal creeks forming a typical dendritic pattern that resembles most low sediment discharge coastal plain estuaries. The bathymetry of the Severn and South Rivers are similar by the fact each river contains a deeper middle section, with shallower mouths and headwaters. These rivers are different in that the Severn River is deeper at the mouth and about 5 meters deeper at its mid-section vs South River. In the Severn River there is a unique bowl shaped geomorphic feature, this is called Round Bay and is represented by stations RBS (Round Bay South), SRN 5 (middle section of Round Bay), and RBN (Round Bay North). A shallow sill exists at either end of Round Bay constricting flow in the area. Located at the mouth of both rivers shallow sills exist.

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.