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Book Estuarine Shoreline Erosion in the Albemarle Pamlico Region of North Carolina

Download or read book Estuarine Shoreline Erosion in the Albemarle Pamlico Region of North Carolina written by Vincent J. Bellis and published by . This book was released on 1975 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tracings: 92.38.

Book Examination of Estuarine Sediment Dynamics

Download or read book Examination of Estuarine Sediment Dynamics written by Devon Olivola Eulie and published by . This book was released on 2014 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation investigated the dynamics of estuarine shorelines in the Albemarle-Pamlico Estuarine System (APES). Shoreline change is influenced by human activities (e.g., shoreline modification), and natural processes (e.g., waves, storms, and sea-level rise) on variable temporal and spatial scales in the coastal zone. This research examined the spatio-temporal dynamics of shoreline change, the drivers of that change, and the role of shoreline erosion in the sediment dynamics of the larger estuarine system. Historical rates of change were found to be comparable to previous studies at -0.5 ± 0.07 m yr−1. Decadal and sub-annual rates of change were highly variable over the study, both spatially and temporally. However, linear regression models indicate that the large changes in shoreline position observed in high-frequency (bi-monthly) surveys are captured within the long-term (historical) average rate of shoreline change. Simulations from a coupled hydrodynamic and wave model indicate that waves and storms (hurricanes) are important drivers of shoreline change. Wave energy along different shorelines was found to be dependent on shorezone characteristics such as shoreline orientation, wind direction and fetch, and nearshore bathymetry. The role of shoreline erosion in the sediment dynamics of the larger estuarine system was also investigated for a region of the APES, the Tar-Pamlico estuary. Shoreline erosion and shoreline modification were examined within the estuary in order to explore the significance of erosion as a source of fine sediment to the estuary. Sediment storage was also evaluated for the Tar-Pamlico estuary using rates of sediment accumulation determined from the radionuclide tracers of 210Pb and 137Cs. A fine sediment budget was constructed for the Tar-Pamlico estuary. The budget indicates that eroding wetland shorelines represent a significant (43% of total fine sediment input) source of material to the estuary. Also, the majority of fine sediment is retained within zones of accumulation within the estuary, with only about 7% potentially exported to the adjacent Pamlico Sound. Overall, this research highlights the dynamic process of estuarine shoreline change, and the role of that change in the functioning of the larger estuarine system. Coastal managers need to incorporate an understanding and accommodation of these processes into future management plans for North Carolina's estuarine shorelines.

Book Evaluation of the Albemarle Pamlico Estuarine Study Area Utilizing Population Land Use and Water Quality Information

Download or read book Evaluation of the Albemarle Pamlico Estuarine Study Area Utilizing Population Land Use and Water Quality Information written by Robert E. Holman and published by . This book was released on 1993 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Soundfront Series

Download or read book The Soundfront Series written by and published by . This book was released on 2001 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Analyzing Estuarine Shoreline Change in Coastal North Carolina

Download or read book Analyzing Estuarine Shoreline Change in Coastal North Carolina written by Lisa Cowart and published by . This book was released on 2009 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: With continued climate change, sea-level rise, and coastal development, concern about shoreline dynamics has expanded beyond oceanfront areas to encompass more protected coastal water bodies, such as estuaries. Because estuaries are critically important ecosystems, understanding coastline changes in these areas is necessary for evaluating resource risks. Throughout the recent decades various methods have been developed to calculate shoreline change and multiple parameters have been hypothesized to correlate with estuarine erosion, including fetch, wave energy, elevation, and vegetation. A transect-based approach is commonly used to quantify shoreline change on linear (i.e., ocean) shorelines; however, due to the complex morphology of the estuarine environments, a point-based approach was developed and applied in this study. Shoreline-change rates and additional parameters (i.e., wave energy and shoreline composition) were determined using 1958 and 1998 aerial photography and available datasets. From these data the average shoreline change of Cedar Island, NC is determined to be -0.24 m yr−1, with 88% of the shoreline eroding. Of the parameters analyzed, shoreline composition appears to have an important control on shoreline erosion along Cedar Island, whereas wave energy is not significantly correlated with shoreline-change rates. The point-based approach was applied to the trunk of the Neuse River Estuary to analyze parameters associated with estuarine erosion at two contrasting scales, regional (whole estuary) and local (estuary partitioned into 8 sections, based on orientation and exposure). With a mean shoreline-change rate of -0.58 m yr−1, the majority (93%) of the Neuse River Estuary study area is eroding. Although linear regression analysis at the regional scale did not find significant correlations between shoreline change and the parameters analyzed, trends were determined at the local scale. Local-scale analysis determined higher erosion rates, higher elevation, and lower exposure and fetch up-estuary. Erosion rates, fetch, and wave exposure increase, while elevation decreases moving eastward, down-estuary. The general trends found at the local scale highlight the importance of the spatial distribution on shoreline-change rates and parameters analyzed within a complex estuarine system, like the Neuse River Estuary. Linear regression analysis between mean fetch and mean shoreline-change rates at the Local Scale determined an equation to predict shoreline-change rates. Predicted shoreline-change rates overestimate erosion on extremely high fetch shorelines and underestimate erosion on shorelines classified as sediment bank. Overall, the model is conservative in predicting shoreline-change rates by underestimating erosion and accretion within the Neuse River Estuary. Further analysis of mean fetch by specific vegetation type may offer additional insight into the influencing forces on estuarine shoreline change.

Book Modern Sedimentation and Estuarine Shoreline Change Around Roanoke Island North Carolina

Download or read book Modern Sedimentation and Estuarine Shoreline Change Around Roanoke Island North Carolina written by David W. Hawkins and published by . This book was released on 2015 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Croatan and Roanoke sounds in North Carolina (NC) are regions constantly undergoing geomorphic changes associated with sea-level rise, storm events, and anthropogenic modification. These estuaries are part of the larger Albemarle-Pamlico Estuarine System (APES), a composite of drowned coastal plain river valleys and large bar-built shallow sounds fronted by the Outer Banks barrier islands. Changes in shoreline morphology driven by erosion and accretion, associated with oceanographic/atmospheric drivers (e.g., wave energy, fetch), influence modern sedimentological patterns and sedimentation rates in the APES. This research focused on the dynamics and controls of modern sedimentary processes (e.g., accumulation) and shoreline change on an anthropogenic time-scale (~100 years) around Roanoke Island, NC. Sedimentological, geochemical, and geospatial analyses provided the necessary information for modern interpretation of the geological processes at work within the past century. Surficial sediment analyses revealed variable grain-size patterns and high loss on ignition (% LOI, organic content proxy) across the region. Sediment accumulation rates (0.12 ± 0.01 cm/y to 0.37 ± 0.04 cm/y) varied over the long-term, and one location (DH-S17) displayed rapid episodic deposition (2.3 ± 0.5 cm/month). Long-term shoreline change (1915-2012) indicated net erosion of the system (-0.68 ± 0.05 m/y), with temporal changes observed in the intermediate time-intervals, and more accretion was captured in the recent- and short-term (2007-2012: -0.24 ± 0.32 m/y). Long-term shoreline change rates (SCRs) provided insight into chronic changes (hydrodynamic and geomorphic changes), while short-term rates, due to events (e.g., hurricanes), revealed episodic variations in accretion and erosion that might not represent the long-term patterns in the system. Overall, the amount of sediment eroded from the shoreline over the 97-year interval (1915-2012) was calculated to be 8.32 x 106 m3, with a mass of 4.16 x 109-8.32 x 109 kg (assuming a dry bulk density range of 0.5-1.0 g/cm3). A sediment accumulation budget of 9.32 x 103 m3/y (7.24 x 106 kg/y) was calculated for two regions (offshore UNC CSI, Shallowbag Bay), and modern accumulation accounts for ~11% (8.57 x 104 m3/y) of the amount of annually eroded sediment. Data from this thesis indicate that the majority of eroded sediment is exported out of Croatan and Roanoke sounds. Spatial and temporal trends in shoreline change and accompanying sedimentary characteristics examined in this thesis provide insight to coastal managers and homeowners in systems similar to the Roanoke Island area.

Book The Ecology of Albemarle Sound North Carolina

Download or read book The Ecology of Albemarle Sound North Carolina written by and published by . This book was released on 1983 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Estuarine Shoreline Erosion in North Carolina

Download or read book Estuarine Shoreline Erosion in North Carolina written by Stanley R. Riggs and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Beach Erosion and Beach Nourishment

Download or read book Beach Erosion and Beach Nourishment written by Robert Dolan and published by . This book was released on 1972 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Relative Estuarine Shoreline Erosion Potential in North Carolina

Download or read book Relative Estuarine Shoreline Erosion Potential in North Carolina written by Michael Peter O'Connor and published by . This book was released on 1978* with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: