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Stronghold Watersheds- Maryland

Small, non-tidal watersheds with the largest population of rare, threatened and endangered aquatic animals.

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Sentinel Site Watersheds- Maryland

Small, healthy non-tidal watersheds that are used for long term monitoring to detect changes from global climate change and from other natural phenomena.

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High Priority Blue Infastructure Watersheds- Maryland

Highest ranking small watersheds that support high quality coastal habitat, natural resources and critical fisheries spawning and nursery areas in tidal waters and near-shore areas.

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Chesapeake Bay watershed 5 year short-term sediment yields 2007 - 2011

Average yields for total sediment (TS) were estimated for the last five years at 65 sites and classified into thirds as high, medium, and low. While the distribution was spatially variable, there were some general patterns in location. Generally, spatial patterns not very discernible for sediment except for higher yields in the middle of the watershed, areas where total nitrogen and total phosphorus yields are also highest. The lowest yields are generally in the western areas of the Bay watershed, an area dominated by forests and on the Eastern Shore of Maryland and Delaware.

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Chesapeake Bay watershed 5 year short-term phosphorus yields 2007 - 2011

Average yields for total phosphorus (TP) were estimated for the last five years at 65 sites and classified into thirds as high, medium, and low. While the distribution was spatially variable, there were some general patterns in location. Generally, higher yields for TP are dominant in the middle of the watershed, areas that also coincide with large urban and agricultural land uses. The lowest yields are generally in the western areas of the Bay watershed, an area dominated by forests.

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Chesapeake Bay watershed 5 year short-term nitrogen yields 2007 - 2011

Average yields for total nitrogen (TN) were estimated for the last five years at 65 sites and classified into thirds as high, medium, and low. While the distribution was spatially variable, there were some general patterns in location. Generally, higher yields for TN are dominant in the middle of the watershed, areas that also coincide with large urban and agricultural land uses. The lowest yields are generally in the Virginia watersheds.

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Chesapeake Bay watershed 10 year sediment flow-adjusted concentration trend 2002 - 2011

Over the past 10 years, the majority of sediment concentration trends are non-significant monitoring at sites within the Bay watershed with many sites showing degrading condition and only a few are improving. The trend results indicate that at some monitored locations, short-term trends indicate that management actions, such as efforts to curb erosion and runoff have reduced concentrations of sediment. While these reductions provide evidence of improving conditions in some upstream areas, additional reductions will be needed to have healthier streams and meet water-quality goals for the Bay.

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