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Showing 1 to 20 of 37 for “"relative sea-level rise"”.
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Relative sea-level rise and the development of channel-fill and shallow-water sequences on Cape Cod, Massachusetts
… sequences record in some detail differing relative sea-level and sedimentation processes. Two distinct channel-fill sequences record differing sequence stratigraphies, and hence different origins and post glacial histories. These sequences have accumulated in channels eroded into two …
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Keeping Pace with Relative Sea Level Rise: Marsh Platform Monitoring Shows Minimal Sediment Deficit along the Louisiana Coast
… an average 9 mm/yr subsidence rate3 and 3 mm/yr sea-level rise1, this accumulation results in a 2.7 MT/yr (3.5%) sediment mass surplus. However, there is a 0.014 km3/yr (5.4%) sediment volume deficit caused by the sediment porosity being too small to fill the accommodation space. About 20 MT/yr …
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Relative sea-level rise and the development of channel-fill and shallow-water sequences on Cape Cod, Massachusetts
… sequences record in some detail differing relative sea-level and sedimentation processes. Two distinct channel-fill sequences record differing sequence stratigraphies, and hence different origins and post glacial histories. These sequences have accumulated in channels eroded into two …
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The late holocene evolution of coastal wetlands in Argyll, Western Scotland
… has experienced differential crustal uplift and relative sea-level changes throughout the Holocene in response to glacio-isostatic adjustment. The complex interplay between land movements and relative sea-level continues to influence the morphological development of the Scottish coast. The study …
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Achieving integrated resilience to Coastal Flooding on the Military Installations and Surrounding Communities on the U.S. East Coast
… exposure due to its low-lying coastline, high relative sea level rise (SLR), land subsidence, and high urban densities. In addition to residential and commercial assets, many populated places also have aging critical infrastructure such as airports, fire stations, schools, roads, bridges, and …
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Exploring Sediment Compaction in Experimental Deltas: Towards a Meso-Scale Understanding of Coastal Subsidence Patterns
… elevation coastal areas has been extensively researched through direct field measurement, numerical modelling, and stratigraphic reconstruction of ancient sediment deposits. Here I present the first investigation of subsidence due to sediment compaction and consolidation in two laboratory scale …
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Estuarine Dynamics as a Function of Barrier Island Transgression and Wetland Loss: Understanding the Transport and Exchange Processes
… coastal Louisiana are experiencing accelerated relative sea level rise rates; therefore, the region is ideal for modeling the global affects of sea level rise (SLR) on estuarine dynamics in a transgressive barrier island setting. The field methods and numerical modeling in this study show that …
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Numerical Simulation of Unsteady Hydrodynamics in the Lower Mississippi River
… channel closures, channel modifications, and relative sea level rise. This study utilized HEC-RAS 4.0, a 1-D mobile-bed numerical model, which was calibrated using a discharge hydrograph at Tarbert Landing and a stage hydrograph at the Gulf of Mexico, to calculate the hydrodynamics of the …
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Subsurface controls on mainland marsh shoreline response during barrier island transgressive submergence
… barrier islands and their attendant marshes to sea level rise. The Mississippi River delta plain, specifically the Chandeleur Islands and associated interior wetlands in eastern Louisiana, serves as an excellent natural laboratory for studying these responses. This region is presently undergoing …
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Stratigraphy And Depositional Environments Of Lower And Middle Cambrian Strata In The Lake Mead Region, Southern Nevada And Northwestern Arizona
… responses to fluctuating rates of relative sea-level rise.
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A Palaeoecological approach to understanding the impact of coastal changes in Late Holocene societies using the Isles of Scilly as a case study
… to explore the impact of environmental changes (relative sea level increase and climate) on coastal communities and to investigate how these environmental factors controlled subsistence economies through the Holocene. The hypothesis tested was that relative sea level rise is a key factor …
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Coastal communities and climate change : a dynamic model of risk perception, storms, and adaptation
Climate change impacts, including sea-level rise and changes in tropical storm frequency and intensity, will pose signicant challenges to city planners and coastal zone managers trying to make wise investment and protection decisions. Meanwhile, policymakers are working to mitigate impacts by …
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Coastal Wetland Dynamics Under Sea-level Rise and Wetland Restoration in the Northern Gulf of Mexico using Bayesian Multilevel Models and a Web Tool
… a lack of modeling framework to predict how relative sea-level rise (SLR), combined with restoration activities, affects landscapes of coastal wetlands with uncertainties accounted for at the entire northern Gulf of Mexico (NGOM). I developed such a modeling framework – Bayesian multi-level …
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Holocene Formation and Evolution of Horn Island, Mississippi, USA
… and evolution of the island in response to sea-level rise, storms, and antecedent geology. The Biloxi and Pascagoula incised valleys converge at Horn Island and have played a profound role in the evolution of the system. Within the incised valleys, numerous shallow paleochannels between 4 …
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Depositional History and Petroleum Potential of the Middle Devonian Fort Vermilion Formation, Alberta
… Formation in the Swan Hills area of Alberta comprises interbedded anhydrite and carbonates. Generally interpreted as being formed subaerially in a sabkha environment, a new depositional model is proposed for this unit whereby sedimentation occurred subaqueous in a protected, variably deep, …
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Sedimentology and Shallow Groundwater Responses of a Coastal Marsh Along a Salinity Gradient: A Case Study In Grand Bay National Estuarine Research Reserve, Mississippi
<p>Climate change and relative sea level rise is resulting in saltwater intrusion and inundation of coastal marshes. This study investigates factors affecting marsh hydrology, including sediment composition, seasonal variability, and coastal storms in Grand Bay National Estuarine Research Reserve …
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Sedimentary Characteristics of an Estuarine Marsh System and the Roles of Storm Overwash, Micro-tidal Currents, and Organic Production: Big Branch Marsh, Louisiana
… in St. Tammany Parish, Louisiana, to discern the relative influences of fluvial, tidal, and storm overwash transport dynamics of a micro-tidal estuarine marsh system. Collected sediment samples from tidal channel beds, pond bottoms, and marsh surfaces were analyzed for organic content and …
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Effects of Elevation and Nutrient Availability On the Primary Production of Spartina Alterniflora and the Stability of Southeastern Coastal Salt Marshes Relative to Sea Level Rise
… of its environment, in equilibrium with sea level rise (SLR), through mineral (sediment) and biogenic accumulation. Accelerating rates of relative sea level rise pose the greatest threat to these systems as it will eventually outpace S. alterniflora's ability to maintain an equilibrium …
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Late Quaternary Evolution and Stratigraphic Framework Influence on Coastal Systems along the North-Central Gulf of Mexico, USA
… to reduced sediment supply, storm impacts and relative sea level rise (RSLR). The geologic record can provide insights of geomorphic threshold crossings (formation, progradation, transgression, destruction) to these forcing mechanisms to predict future barrier evolution to climate change. The …
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Complex retreat behavior in experimental barrier island response to base level rise
… features and are susceptible to drowning from sea level rise. However, previous work suggests that barrier islands can retreat upslope to keep up with sea level rise and maintain their subaerial extent. To explore this idea, we performed physical experiments where barrier islands were subjected …
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