Encore -- d:(Watersheds -- Middle Atlantic States)

The 1996 Mid-Atlantic Winter Flood: Exploring Climate Risk through a Storyline Approach.

Pettett, Abigail;Zarzycki, Colin M.

Academic Journal | Journal of Hydrometeorology. Dec2023, Vol. 24 Issue 12, p2259-2280. 22p. Please log in to see more details

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Chesapeake Bay Watershed [electronic resource] : protecting the Chesapeake Bay and its rivers through science, restoration, and partnership / Chesapeake Bay Program.

Geological Survey (U.S.)

Map | 2012

Available at Available Online freely available Government Documents (USU and USU Eastern) (Call number: ELECTRONIC DOCUMENT)

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Index of surface-water records to September 30, 1967. part 1, North Atlantic slope basins

Anderson, B. A.;Ham, C. B.;Geological Survey (U.S.);Anderson, B. A.;Ham, C....

Book | Index of surface-water records to September 30, 1967. part 1, North Atlantic slope basins; 01/01/1968 Please log in to see more details

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Index of surface-water records to September 30, 1967. part 1, North Atlantic slope basins / by B.A. Anderson and C.B. Ham.

Anderson, B. A.

Government Document | 1968

Available at Available Merrill-Cazier Government Documents (Lower Level) (Call number: I 19.4/2:571)

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Index of surface-water records to September 30, 1967. Part 1. North Atlantic slope basins / by B.A. Anderson and C.B. Ham.

Anderson, B. A., author.

Electronic Government Doc | 1968

Available at Online freely available Government Documents (USU and USU Eastern)

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Index of surface-water records to December 31, 1963. part 1, North Atlantic slope basins

Anderson, B. A.;Ham, C. B.;Geological Survey (U.S.);Anderson, B. A.;Ham, C....

Book | Index of surface-water records to December 31, 1963. part 1, North Atlantic slope basins; 01/01/1965 Please log in to see more details

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Modeling Land Use and Management Practices Impacts on Soil Organic Carbon Loss in an Agricultural Watershed in the Mid-Atlantic Region.

Tijjani, Sadiya Baba;Qi, Junyu;Giri, Subhasis;Lathrop, Richard

Academic Journal | Water (20734441); Oct2023, Vol. 15 Issue 20, p3534, 23p Please log in to see more details

Measuring organic carbon (OC) losses from soils presents a challenge because of the in... more

Modeling Land Use and Management Practices Impacts on Soil Organic Carbon Loss in an Agricultural Watershed in the Mid-Atlantic Region.

Water (20734441); Oct2023, Vol. 15 Issue 20, p3534, 23p

Measuring organic carbon (OC) losses from soils presents a challenge because of the intricate interplay of human-induced and biophysical processes. This study employs SWAT-C to simulate particulate OC (POC) and dissolved OC (DOC) losses from the Upper Maurice Watershed in the Mid-Atlantic Region. Simulation outcomes reveal that surface runoff was the primary contributor to the total DOC load (65%), followed by lateral flow (30%), and then groundwater (5%). Meanwhile, POC load was linked to erosion processes induced by surface runoff. Our findings indicate that agricultural land-use types exhibited the highest annual average DOC and POC loads. Forests and grasslands displayed intermediate loads, while barren land had the lowest load. Concerning seasonal fluctuations, agricultural land-use types exhibited distinct DOC and POC load patterns when compared to forest and grassland types, indicating the dominant role of management practices in determining soil OC (SOC) losses. Additional modeling of management practices' impact on SOC budgets indicates maximal SOC sequestration with full irrigation, no-till (NT), and full fertilization. In contrast, the largest SOC depletion arises from combining conservation tillage (CT) and no fertilization, irrespective of irrigation. This study shows that SWAT-C can be used to simulate land use and management impacts on SOC dynamics. [ABSTRACT FROM AUTHOR]

Subject terms:

MIDDLE Atlantic States - LAND management - AGRICULTURE - CARBON in soils - CONSERVATION tillage - WATERSHEDS - LAND cover - PLATEAUS

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Index of surface-water records to December 31, 1963. part 1, North Atlantic slope basins / by B.A. Anderson and C.B. Ham.

Anderson, B. A.

Government Document | 1965

Available at Available Merrill-Cazier Government Documents (Lower Level) (Call number: I 19.4/2:501)

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Index of surface-water records to December 31, 1963. Part 1, North Atlantic slope basins / by B.A. Anderson and C.B. Ham.

Anderson, B. A., author.

Electronic Government Doc | 1965

Available at Online freely available Government Documents (USU and USU Eastern)

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Spatially averaged stratigraphic data to inform watershed sediment routing: An example from the Mid-Atlantic United States.

Pizzuto, J. E.;Skalak, K. J.;Benthem, A.;Mahan, S. A.;Sherif, M.;Pearson, A...

Academic Journal | Geological Society of America Bulletin. Jan2023, Vol. 135 Issue 1/2, p249-270. 22p. Please log in to see more details

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Interacting Effects of Watershed and Coastal Processes on the Evolution of Compound Flooding During Hurricane Irene.

Deb, Mithun;Sun, Ning;Yang, Zhaoqing;Wang, Taiping;Judi, David;Xiao, Ziyu;W...

Academic Journal | Earth's Future; Mar2023, Vol. 11 Issue 3, p1-23, 23p Please log in to see more details

In low‐lying estuarine regions, compound flooding (CF) is caused by the co‐occurrence ... more

Interacting Effects of Watershed and Coastal Processes on the Evolution of Compound Flooding During Hurricane Irene.

Earth's Future; Mar2023, Vol. 11 Issue 3, p1-23, 23p

In low‐lying estuarine regions, compound flooding (CF) is caused by the co‐occurrence of extreme precipitation, river flooding and storm surge. In recent decades, there has been a rise in the frequency and intensity of pluvial‐coastal CF events in different parts of the U.S. due to the increased frequency of intense precipitation and storm surge events. However, in estuarine and deltaic regions, the CF characteristics depend mainly on the storm tide and river flow interaction. Understanding how the fluvial‐coastal CF may respond to changes to watershed and estuarine characteristics is essential for future CF hazard prediction. This study examined two critical processes: (a) the interplay between antecedent soil moisture conditions and peak river flow, and (b) how the impact of sea level rise (SLR) on storm surge and river flood distribution alters the CF in complex estuaries. As the study area, we selected the Delaware Bay and River, a shallow and convergent estuary in the US Mid‐Atlantic region—where flood hazards during a CF can become more significant than the surge and river flood processes occurring in isolation. For the focal event for the study, we selected Hurricane Irene (2011) because it reportedly produced the most extreme CF over the past two decades in the same region. Ultimately, our results illustrated that the potential changes to the catchment and bay characteristics from the global temperature increase and SLR could significantly modulate the fluvial‐coastal CF variability. The potential increase in global temperature and rainfall intensity might not always exacerbate the CF. Plain Language Summary: Low‐lying and densely populated coastal and estuarine cities are highly vulnerable to extreme coastal high tide, storm surge, precipitation, and high river discharge. Amid growing research on the risk of compound flood hazards in the future climate, this study examined the interacting flood processes in freshwater‐influenced coastal systems. First, we investigated the interplay between the potential antecedent soil moisture conditions, river discharge, and compound flooding in the Delaware Bay and River (DBR). Subsequently, we evaluated the effect of sea‐level rise on storm surge and river flood distribution in the same area. The study revealed that the flood depth in DBR is extremely sensitive to the watershed's antecedent soil moisture condition and sea‐level rise. Studies that focus on large‐scale future compound flooding hazard assessment need to adequately address the interacting watershed‐coastal processes. Key Points: Future global warming‐induced changes to the watershed and estuary characteristics could significantly modulate the fluvial‐coastal floodingThe potential increase in global temperature and rainfall intensity might not always worsen the compound floodingUncertainties from the interacting processes must be carefully addressed for a comprehensive compound flood hazard projection [ABSTRACT FROM AUTHOR]

Subject terms:

DELAWARE Bay (Del. & N.J.) - MIDDLE Atlantic States - STORM surges - RAINFALL - ABSOLUTE sea level change - FLOODS - STREAMFLOW - FLUVIAL geomorphology - WATERSHEDS

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Risk Factors for 100‐Year Flood Events in the Mid‐Atlantic Region of the United States.

Tonn, Gina;Guikema, Seth

Academic Journal | Risk Analysis: An International Journal. Sep2021, Vol. 41 Issue 9, p1540-1559. Please log in to see more details

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Modeling sediment diagenesis processes on riverbed to better quantify aquatic carbon fluxes and stocks in a small watershed of the Mid-Atlantic region.

Qi, Junyu;Zhang, Xuesong;Lee, Sangchul;Wu, Yiping;Moglen, Glenn E.;McCarty,...

Academic Journal | Carbon Balance & Management. 7/6/2020, Vol. 15 Issue 1, p1-14. 14p. 2 Diagrams, 4 Charts, 3 Graphs, 1 Map. Please log in to see more details

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Freshwater salinization syndrome alters retention and release of chemical cocktails along flowpaths: From stormwater management to urban streams.

Kaushal, Sujay S.;Reimer, Jenna E.;Mayer, Paul M.;Shatkay, Ruth R.;Maas, Ca...

Academic Journal | Freshwater Science; Sep2022, Vol. 41 Issue 3, p420-441, 22p Please log in to see more details

Freshwater salinization syndrome (FSS) refers to the suite of interactive effects of s... more

Freshwater salinization syndrome alters retention and release of chemical cocktails along flowpaths: From stormwater management to urban streams.

Freshwater Science; Sep2022, Vol. 41 Issue 3, p420-441, 22p

Freshwater salinization syndrome (FSS) refers to the suite of interactive effects of salt ions on degradation of physical, biological, and social systems. Best management practices (BMPs), which are methods to effectively reduce runoff and nonpoint source pollution (stormwater, nutrients, sediments), do not typically consider management of salt pollution. We investigate impacts of FSS on mobilization of salts, nutrients, and metals in urban streams and stormwater BMPs by analyzing original data on concentrations and fluxes of salts, nutrients, and metals from 7 urban watersheds in the Mid-Atlantic USA and synthesizing literature data. We also explore future critical research needs through a survey of practitioners and scientists. Our original data show 1) sharp pulses in concentrations of salt ions and metals in urban streams directly following both road salt events and stream restoration construction (e.g., similar to the way concentrations increase during other soil disturbance activities); 2) sharp declines in pH (acidification) in response to road salt applications because of mobilization of H+ from soil exchange sites by Na+; 3) sharp increases in organic matter from microbial and algal sources (based on fluorescence spectroscopy) in response to road salt applications, likely because of lysing cells and changes in solubility; 4) substantial retention (~30–40%) of Na+ in stormwater BMP sediments and floodplains in response to salinization; 5) increased ion exchange and mobilization of diverse salt ions (Na+, Ca2+, K+, Mg2+), nutrients (N, P), and trace metals (Cu, Sr) from stormwater BMPs and restored streams in response to FSS; 6) downstream increasing loads of Cl–, SO42–, Br–, F–, and I– along flowpaths through urban streams and P release from urban stormwater BMPs in response to salinization; and 7) a substantial annual reduction (>50%) in Na+ concentrations in an urban stream when road salt applications were dramatically reduced, which suggests potential for ecosystem recovery. We compare our original results with published metrics of contaminant retention and release across a broad range of stormwater BMPs from North America and Europe. Overall, urban streams and stormwater BMPs consistently retain Na+ and Cl– but mobilize multiple contaminants based on salt types and salinity levels. Finally, we present our top 10 research questions regarding FSS impacts on urban streams and stormwater BMPs. Reducing diverse chemical cocktails of contaminants mobilized by freshwater salinization is a priority for effectively and holistically restoring urban waters. [ABSTRACT FROM AUTHOR]

Subject terms:

MIDDLE Atlantic States - URBAN runoff management - TRACE metals - SALINIZATION - NONPOINT source pollution - URBAN watersheds - STREAM restoration - STORMWATER infiltration - FRESH water

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Riverine Carbon Cycling Over the Past Century in the Mid‐Atlantic Region of the United States.

Yao, Yuanzi;Tian, Hanqin;Pan, Shufen;Najjar, Raymond G.;Friedrichs, Marjori...

Academic Journal | Journal of Geophysical Research. Biogeosciences; May2021, Vol. 126 Issue 5, p1-22, 22p Please log in to see more details

The lateral transport and degassing of carbon in riverine ecosystems is difficult to q... more

Riverine Carbon Cycling Over the Past Century in the Mid‐Atlantic Region of the United States.

Journal of Geophysical Research. Biogeosciences; May2021, Vol. 126 Issue 5, p1-22, 22p

The lateral transport and degassing of carbon in riverine ecosystems is difficult to quantify on large spatial and long temporal scales due to the relatively poor representation of carbon processes in many models. Here, we coupled a scale‐adaptive hydrological model with the Dynamic Land Ecosystem Model to simulate key riverine carbon processes across the Chesapeake and Delaware Bay Watersheds from 1900 to 2015. Our results suggest that throughout this time period riverine CO2 degassing and lateral dissolved inorganic carbon fluxes to the coastal ocean contribute nearly equally to the total riverine carbon outputs (mean ± standard deviation: 886 ± 177 Gg C∙yr−1 and 883 ± 268 Gg C∙yr−1, respectively). Following in order of decreasing importance are the lateral dissolved organic carbon flux to the coastal ocean (293 ± 81 Gg C∙yr−1), carbon burial (118 ± 32 Gg C∙yr−1), and lateral particulate organic carbon flux (105 ± 35 Gg C∙yr−1). In the early 2000s, carbon export to the coastal ocean from both the Chesapeake and Delaware Bay watersheds was only 15%–20% higher than it was in the early 1900s (decade), but it showed a twofold increase in standard deviation. Climate variability (changes in temperature and precipitation) explains most (225 Gg C∙yr−1) of the increase since 1900, followed by changes in atmospheric CO2 (82 Gg C∙yr−1), atmospheric nitrogen deposition (44 Gg C∙yr−1), and applications of nitrogen fertilizer and manure (27 Gg C∙yr−1); in contrast, land conversion has resulted in a 188 Gg C∙yr−1 decrease in carbon export. Plain Language Summary: Rivers are an important component of the terrestrial‐aquatic ocean continuum as they serve as a conduit for transporting carbon from the land to the coastal ocean. It is essential to track the fate of this carbon, including how much carbon is buried in the riverbed, outgassed to the atmosphere, and exported to the ocean. However, it is often difficult to quantify these carbon transport processes on the watershed scale because observational data obtained by field surveys can only be used to estimate the magnitude of these processes at distinct points. In this study, we used a coupled terrestrial‐aquatic ecosystem model to assess the century‐long full carbon budget of the riverine ecosystem across the watersheds of Chesapeake Bay and Delaware Bay. In addition, we examined the individual and combined impacts of climate change and anthropogenic activities on these terrestrial ecosystems and the resultant CO2emissions of their associated rivers. We found that climate variability and land conversion (from cropland to impervious surfaces and forest) are the most important factors governing the long‐term change in riverine carbon dynamics. We also highlighted the importance of riverine CO2 emissions in the overall regional carbon budget. Key Points: Riverine carbon fluxes show twofold increase in standard deviation resulting from increased climate variabilityClimate variability explains most of the interdecadal change in riverine carbon export to the coastal ocean in the US Mid‐Atlantic watershedsAt the same time, land conversion from cropland to impervious surfaces and forest has decreased carbon export to the coastal ocean [ABSTRACT FROM AUTHOR]

Subject terms:

MIDDLE Atlantic States - UNITED States - CARBON cycle - WATERSHEDS - CARBON compounds - CLIMATE change - COASTS

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Stream Temperature Predictions for River Basin Management in the Pacific Northwest and Mid-Atlantic Regions Using Machine Learning.

Weierbach, Helen;Lima, Aranildo R.;Willard, Jared D.;Hendrix, Valerie C.;Ch...

Academic Journal | Water (20734441); Apr2022, Vol. 14 Issue 7, p1032, 21p Please log in to see more details

Stream temperature ( T s ) is an important water quality parameter that affects ecosys... more

Stream Temperature Predictions for River Basin Management in the Pacific Northwest and Mid-Atlantic Regions Using Machine Learning.

Water (20734441); Apr2022, Vol. 14 Issue 7, p1032, 21p

Stream temperature ( T s ) is an important water quality parameter that affects ecosystem health and human water use for beneficial purposes. Accurate T s predictions at different spatial and temporal scales can inform water management decisions that account for the effects of changing climate and extreme events. In particular, widespread predictions of T s in unmonitored stream reaches can enable decision makers to be responsive to changes caused by unforeseen disturbances. In this study, we demonstrate the use of classical machine learning (ML) models, support vector regression and gradient boosted trees (XGBoost), for monthly T s predictions in 78 pristine and human-impacted catchments of the Mid-Atlantic and Pacific Northwest hydrologic regions spanning different geologies, climate, and land use. The ML models were trained using long-term monitoring data from 1980–2020 for three scenarios: (1) temporal predictions at a single site, (2) temporal predictions for multiple sites within a region, and (3) spatiotemporal predictions in unmonitored basins (PUB). In the first two scenarios, the ML models predicted T s with median root mean squared errors (RMSE) of 0.69–0.84 °C and 0.92–1.02 °C across different model types for the temporal predictions at single and multiple sites respectively. For the PUB scenario, we used a bootstrap aggregation approach using models trained with different subsets of data, for which an ensemble XGBoost implementation outperformed all other modeling configurations (median RMSE 0.62 °C).The ML models improved median monthly T s estimates compared to baseline statistical multi-linear regression models by 15–48% depending on the site and scenario. Air temperature was found to be the primary driver of monthly T s for all sites, with secondary influence of month of the year (seasonality) and solar radiation, while discharge was a significant predictor at only 10 sites. The predictive performance of the ML models was robust to configuration changes in model setup and inputs, but was influenced by the distance to the nearest dam with RMSE <1 °C at sites situated greater than 16 and 44 km from a dam for the temporal single site and regional scenarios, and over 1.4 km from a dam for the PUB scenario. Our results show that classical ML models with solely meteorological inputs can be used for spatial and temporal predictions of monthly T s in pristine and managed basins with reasonable (<1 °C) accuracy for most locations. [ABSTRACT FROM AUTHOR]

Subject terms:

MIDDLE Atlantic States - WATER temperature - MACHINE learning - STANDARD deviations - CLIMATE extremes - STRUT & tie models - WATERSHEDS

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Streambank Legacy Sediment Contributions to Suspended Sediment‐Bound Nutrient Yields from a Mid‐Atlantic, Piedmont Watershed.

Jiang, Grant;Lutgen, Alyssa;Mattern, Katie;Sienkiewicz, Nathan;Kan, Jinjun;...

Academic Journal | Journal of the American Water Resources Association. Oct2020, Vol. 56 Issue 5, p820-841. 22p. Please log in to see more details

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Synthesis of nutrient and sediment export patterns in the Chesapeake Bay watershed: Complex and non-stationary concentration-discharge relationships.

Zhang, Qian

Academic Journal | Science of the Total Environment. Mar2018, Vol. 618, p1268-1283. 16p. Please log in to see more details

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Adaptation, Sea Level Rise, and Property Prices in the Chesapeake Bay Watershed.

Walsh, Patrick;Griffiths, Charles;Guignet, Dennis;Klemick, Heather

Academic Journal | Land Economics; Feb2019, Vol. 95 Issue 1, p19-34, 16p Please log in to see more details

Coastal communities are facing the dual threat of increasing sea level rise (SLR) and ... more

Adaptation, Sea Level Rise, and Property Prices in the Chesapeake Bay Watershed.

Land Economics; Feb2019, Vol. 95 Issue 1, p19-34, 16p

Coastal communities are facing the dual threat of increasing sea level rise (SLR) and swelling populations, causing challenging policy problems. To help inform policy makers, this paper explores the property price impact of structures that help protect against SLR, using a novel and spatially explicit dataset of coastal features. Results indicate that adaptation structures can have a significant positive impact on waterfront home prices, with the most vulnerable homes seeing the largest impacts. The Chesapeake Bay is facing increasing pressure from SLR, and this is one of the first papers to report that local property markets are incorporating that threat. (JEL Q51, Q58) [ABSTRACT FROM AUTHOR]

Subject terms:

MIDDLE Atlantic States - BEACH houses - SEA level - HOME prices - WATERSHEDS - LAND economics

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Nitrogen cycling in the Middle Atlantic Bight: Results from a three-dimensional model and implications for the North Atlantic nitrogen budget.

Fennel, Katja;Wilkin, John;Levin, Julia;Moisan, John;O'Reilly, John;Haidvog...

Academic Journal | Global Biogeochemical Cycles; Sep2006, Vol. 20 Issue 3, p1-14, 14p Please log in to see more details

The biogeochemistry of continental shelf systems plays an important role in the global... more

Nitrogen cycling in the Middle Atlantic Bight: Results from a three-dimensional model and implications for the North Atlantic nitrogen budget.

Global Biogeochemical Cycles; Sep2006, Vol. 20 Issue 3, p1-14, 14p

The biogeochemistry of continental shelf systems plays an important role in the global elemental cycling of nitrogen and carbon, but remains poorly quantified. We have developed a high-resolution physical-biological model for the U.S. east coast continental shelf and adjacent deep ocean that is nested within a basin-wide North Atlantic circulation model in order to estimate nitrogen fluxes in the shelf area of the Middle Atlantic Bight (MAB). Our biological model is a relatively simple representation of nitrogen cycling processes in the water column and organic matter remineralization at the water-sediment interface that explicitly accounts for sediment denitrification. Climatological and regionally integrated means of nitrate, ammonium, and surface chlorophyll are compared with its model equivalents and were found to agree within 1 standard deviation. We also present regional means of primary production and denitrification, and statistical measures of chlorophyll pattern variability. A nitrogen budget for the MAB shows that the sediment denitrification flux is quantitatively important in determining the availability of fixed nitrogen and shelf primary production (it was found to remove 90% of all the nitrogen entering the MAB). Extrapolation of nitrogen fluxes estimated for the MAB to the North Atlantic basin suggests that shelf denitrification removes 2.3 × 1012 mol N annually; this estimate exceeds estimates of N2 fixation by up to an order of magnitude. Our results emphasize the importance of representing shelf processes in biogeochemical models. [ABSTRACT FROM AUTHOR]

Subject terms:

MIDDLE Atlantic States - NORTH Atlantic Ocean - UNITED States - CONTINENTAL shelf - NITROGEN cycle - BIOGEOCHEMISTRY - TERRITORIAL waters - COASTS - WATERSHEDS

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Channel head locations in forested watersheds across the mid-Atlantic United States: A physiographic analysis

Julian, Jason P.;Elmore, Andrew J.;Guinn, Steven M.

Academic Journal | Geomorphology. Dec2012, Vol. 177-178, p194-203. 10p. Please log in to see more details

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