Atlantic and Gulf Coastal Province

Walker, H. Jesse; Coleman, James M.

doi:10.1130/dnag-cent-v2.51

Cited by 31 publications

(23 citation statements)

References 35 publications

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“…These data have been corrected here to 2.5 mm yr -1 for eustatic sea-level rise over the past century. In the mid-Atlantic region, RSLR is between 3 and 4 mm yr -1 (Titus & Narayanan 1995), suggesting a local component of RSLR of about 2 mm yr -1 , which may be due to variations in the accumulations of Holocene sediments and their subsequent compaction (Psuty 1992, Nicholls & Leatherman 1996, regional differential crustal warping (Walker & Coleman 1987) and possibly removal of groundwater by humans (Leatherman et al 1995). Kearney & Stevenson (1991) noted that around Chesapeake Bay, relatively rapid RSLR during the 19th century contrasts with slower RSLR during the 17th and 18th centuries, a period of cooler global conditions.…”

Section: Notementioning

confidence: 99%

The potential impacts of climate change on the mid-Atlantic coastal region

Najjar¹,

Walker²,

Anderson³

et al. 2000

Clim. Res.

192

128

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This paper assesses the potential impacts of climate change on the mid-Atlantic coastal (MAC) region of the United States. In order of increasing uncertainty, it is projected that sea level, temperature and streamflow will increase in the MAC region in response to higher levels of atmospheric CO 2 . A case study for Delaware based on digital elevation models suggests that, by the end of the 21st century, 1.6% of its land area and 21% of its wetlands will be lost to an encroaching sea. Sea-level rise will also result in higher storm surges, causing 100 yr floods to occur 3 or 4 times more frequently by the end of the 21st century. Increased accretion in coastal wetlands, however, which may occur in response to increases in CO 2 , temperature, and streamflow, could mitigate some of the flooding effect of sea-level rise. Warming alone will result in northward displacements of some mobile estuarine species and will exacerbate the already low summer oxygen levels in mid-Atlantic estuaries because of increased oxygen demand and decreased oxygen solubility. Streamflow increases could substantially degrade water quality, with significant negative consequences for submerged aquatic vegetation and birds. Though climate change may have some positive impacts on the MAC region, such as increased coastal tourism due to warming and some ecological benefits from less-frequent harsh winters, most impacts are expected to be negative. Policies designed to minimize adverse ecological impacts of human activities on coastal ecosystems in the mid-Atlantic, such as decreases in nutrient loading of watersheds, could help mitigate some of the risks associated with future climate variability and change in this region.

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Section: Notementioning

confidence: 99%

The potential impacts of climate change on the mid-Atlantic coastal region

Najjar¹,

Walker²,

Anderson³

et al. 2000

Clim. Res.

192

128

View full text Add to dashboard Cite

show abstract

“…Environmental Information Document-SRS Geology& Hydrogeology Regional Setting Shelf was subaerial as recently as 18,000 years ago, during the last glacial maximum; whereas parts of the Atlantic Coastal Plain have not been submerged since the Cretaceus (Walker and Coleman 1987). The interface between these two divisions, submerged and subaerial (i.e., the coastline), has been near its present position for only about 5000-6000 years (Walker and Coleman 1987).…”

Section: Chapter 2-geomo~hologymentioning

confidence: 99%

“…The interface between these two divisions, submerged and subaerial (i.e., the coastline), has been near its present position for only about 5000-6000 years (Walker and Coleman 1987).…”

Section: Chapter 2-geomo~hologymentioning

confidence: 99%

“…These exposed sediments generally increase in age upslope. These older sediments have been subjected longer to subaerial geomorphic forces (Walker and Coleman 1987). In addition to slope and rock type, the effectiveness of processes within the province has varied mainly, with tectonic activity, climate, time, and, more recently, human activity.…”

Section: Chapter 2-geomo~hologymentioning

confidence: 99%

“…The uni~ing character of this province stems mainly from a geologic history that has recorded alternating periods of submergence and emergence (Walker and Coleman 1987). Thus, all parts of the province have experienced coastal processes, usually several times.…”

Section: Regional Setting Introductionmentioning

confidence: 99%

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SRS Geology/Hydrogeology Environmental Information Document

Denham¹

1999

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Relative effects of geographically isolated wetlands on streamflow: a watershed‐scale analysis

et al. 2015

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Geographically isolated wetlands (GIWs) are characterized as ‘isolated’ because they are embedded by uplands, though they potentially exhibit a gradient of hydrologic, biological, or chemical connections to other surface waters. In fact, recent field studies have begun to elucidate that GIWs exhibit varying degrees of hydrologic connectivity. In this study, we examine the influence of GIWs on streamflow, a potential indicator of GIW hydrologic connectivity with surface waters. We assess annual and seasonal spatially based statistical relationships between GIW characteristics (e.g. volume and extent) and streamflow across a dense network of subbasins using a hybrid modeling approach. Our method involves the Spatial Stream Network (SSN) model, which considers spatial autocorrelation of model covariates explicitly, and the Soil and Water Assessment Tool (SWAT), which predicts streamflow across a network of 579 subbasins in the lower Neuse River Basin, North Carolina, USA. Our study results suggest that GIWs, to some extent, influence streamflow. The further GIWs are from a stream, the greater their capacity to increase streamflow due to the physiographic setting, hypothesized transit times, and sequencing of watershed hydrologic connectivity in the study area. However, as the combined extent of GIWs and non‐GIWs increases in subbasins, seasonal and annual streamflow decreases. Results also suggest that other landscape indicators of watershed‐scale hydrology can, in aggregate with GIWs and non‐GIWs, explain variations in seasonal and annual simulated streamflow. Our study findings begin to elucidate the aggregate influence of GIWs on streamflow, providing insights for future decision‐making on GIW protection and management. Copyright © 2015 John Wiley & Sons, Ltd.

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Atlantic and Gulf Coastal Province

Cited by 31 publications

References 35 publications

The potential impacts of climate change on the mid-Atlantic coastal region

The potential impacts of climate change on the mid-Atlantic coastal region

SRS Geology/Hydrogeology Environmental Information Document

Relative effects of geographically isolated wetlands on streamflow: a watershed‐scale analysis

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