Quantifying Water Budgets for Two Stormwater Detention Ponds in Coastal South Carolina

Presenter: Samantha Maness

Due to their ability to retain pollutants and minimize pollutant impact on surrounding water bodies, stormwater detention ponds are commonly used stormwater management practices.  Stormwater engineers construct ponds to moderate peak flow intensities and to allow residence time of the water within the pond to enhance pollutant removal, however there are minimal field based studies evaluating their hydraulic effectiveness.  This study seeks to compare hydraulic effectiveness of two stormwater detention ponds located in coastal South Carolina to their theoretical design plan.  A high resolution water budget will be calculated over the course of one year, monitoring temporal variability associated with varying rainfall events and water table conditions.  Inflow components include surface inflow (sheetflow runoff and engineered drainage networks), groundwater inflow, and precipitation.  Outflow components include evaporation and surface outflow.  Interactions between groundwater and pond water are an important, yet often ignored, component of water budget estimations.  We will evaluate the significance of the groundwater component of water budgets for stormwater detention ponds by using a natural tracer 222Rn.  This research will later be coupled with the input pollutant fluxes compared to the output pollutant fluxes, resulting in an estimate of expected performance of residential stormwater detention ponds as structural best management practices along coastal South Carolina.

Impact of Humans and High Traffic Density on Freshwater Turtle Populations of Coastal South Carolina

Presenter: Andre Dominguez

Recent studies have shown that humans, and their ability to alter landscapes can cause detrimental effects on freshwater turtle populations. Turtle populations, due to their life histories, are reliant on their sexually mature individuals to reproduce; so significant pressures on these individuals can cause larger population and even community changes. Human activities such as development and driving have been found to be heavy pressures on freshwater turtle populations elsewhere, causing drastic changes in population dynamics therein. To examine this issue on the coastal region of South Carolina a total of 10 ponds were used (5 un-impacted and 5 impacted). Using a comparative approach we quantified differences in turtle populations found in ponds of varied road/traffic density. A common freshwater found in the study area, the Yellow-bellied slider (Trachemys scripta n=269) was used for comparative analysis. Differences were found between the population stocks of the two categorized wetland types in the study (impacted and unimpacted) and between populations of other freshwater turtle assemblages found in others’ study areas.

Linking water quality and beach morphodynamics in a heavily impacted tidal creek in Myrtle Beach, South Carolina

Presenter: Brittany Hoffnagle

Tidal creeks, locally known as swashes, are important transition zones which facilitate water exchange from the land to the ocean. Morphological changes to tidal creeks can have ecological implications for the natural dynamics of the ecosystems. Singleton Swash is a tidal creek in Myrtle Beach, South Carolina that is representative of a highly modified tidal creek that experiences morphological change due to coastal processes (e.g., longshore current, wave intensity, weather events). The dynamic nature of this swash results in erosional risks to adjacent resort properties and a decline in water quality within the tidal creek. This study aims to monitor the morphological change of Singleton Swash and its’ effect on water quality by coupling the use of highly accurate GPS technology and a suite of water quality parameters. Monthly topographic maps were created and subtracted to identify areas of erosion and deposition using ArcGIS. Over a six month period, a natural sill developed causing a deflection of the swash mouth to the south direction consistent with the prevailing direction of long shore current. This diversion to the south resulted in a dampening of the tidal prism amplitude indicating that the mouth was beginning to close. Future post- processing will include a variety of Arc GIS tools to make correlations between a suite of metrics (e.g., sinuosity, angle of across-shore orientation, radius of curvature) and water level. This extensive unique data set will represent the pre-condition state before a more permanent structure is constructed at Singleton Swash.

Matthew Carter

Fish Assemblages at Jim Caudle Artificial Reef

Fish Assemblages at Jim Caudle Artificial Reef: A spatial and temporal investigation of variance in fish populations using underwater visual census and an exploratory midwater column analysis for multibeam sonar

Presenter: Andrew Frink

Advisor: Dr. Paul Gayes

These Committee: Robert Martore (SCDNR), Dr. Erin Burge, Dr. Robert Young

Date, Tme and Location: August 8th at 1:00PM in BCCMWS room 100

 

 

 

Evaluation of Natural Tracers in Optical Flow Measurements

Amanda Wright

Visiting Undergraduate Student

Department of Math, Physics, and Computer Science 

Roanoke College

Salem, VA

 

 

HUGO team updates 2014 hurricane outlook (July 2014)

For more information about CCU’s HUGO Project, contact Len Pietrafesa at 843-349-4017 or 704-910-7047 or email lpietraf@coastal.edu.

Category

Forecast Value

Forecast Range

HUGO team updates 2014 hurricane outlook (June 2014)

For more information about CCU’s HUGO Project, contact Len Pietrafesa at 843-349-4017 or 704-910-7047 or email lpietraf@coastal.edu

Pages

Subscribe to School of the Coastal Environment Web Portal RSS