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Chloe Constants Comparison of bathymetry data sets in the Lafayette River Chloe Constants Department of Ocean, Earth, and Atmospheric Sciences, Old Dominion University, Norfolk, VA Abstract Methods Results Results Bathymetric maps are topographic maps of the Side scan sonar measurements- The bottom features of a lake, bay, or ocean. They Humminbird 998C GPS Fishing Series are very similar to topographic maps in their recorded a two pass on each cross section terminology and interpretation. The principle transect spaced at ~10-20 meters apart for difference is that bathymetric maps show depth coverage. The locations of the paths were below sea level while topographic maps show decided at cross sections in the river that were elevation above sea level. The primary goal of at bends, near bridges, in the main channel, this study is to spatially analyze the relationship and spaced apart. Using Humminbird software between side scan sonar measurements from a Humviewer, the paths were downloaded and GPS operating system to nautical charts for the reformatted to analyze and create graphs. A Lafayette River. Three-dimensional bathymetry three-dimensional plot of latitude and longitude was created from the paths and compared to pairs with depth was created in Wolfram the recorded paths from the side scan sonar. Mathematica to illustrate bathymetry. Conclusions • Correlation between the two techniques so comparison can be observed • Tracklines from the GPS operating systems are similar to the three-dimensional graphs of the cross section transects • Transducer tracks show the array of the depth signal for the cross sectional paths • Accuracy is displayed with the three-dimensional bathymetry plots • Future work would be to create a bathymetry of the entire area of the Lafayette River Locations of cross sections. The basemap is the NOAA 12253 electronic nautical chart for the Norfolk Harbor and Elizabeth River focused on the Lafayette River with depths shown in feet. The color ramp shows the distribution of depths of the cross sections in meters. Cross section 1 is the long transect in the channel, cross section 2 is located on the east side of Hampton Road Bridge, cross section 3 is at a bend in the lower part of the river, and cross section 4 and 5 are on the west and east side of Granby Street Bridge. Three-dimensional bathymetry of cross sectional Tracklines collected from side scan sonar. I would like to thank OEAS professor Dr. Fred Dobbs, teaching assistants Chris Powell, Ben Hiza, areas. Shallow depths range from -1 to -3 meters. The transducers returning echo is shown with Joyce Strain, data analysis assistance from Paul Anderson and Jake Spracher. Deep depths range from -5 to -6 meters. depth recorded in feet. Abstract Results Discussion Lake Ballard is a man made lake, • The groundwater flow has fully returned to the East to West located within the Hoffler Creek Head contours pattern described in previous Wildlife Preserve in Portsmouth, VA. pre-hurricane studies. My study provides an analysis of the Irene created groundwater flow pattern, in relation • However, small-scale using Darcy’s groundwater flow is less to past studies. Law. predictable than regional ground water flow due to small-scale changes in aquifer Fig. 1: 2012 GW contour map (Seger) characteristics, such as hydraulic Introduction Yellow arrows conductivity. • In 2005, the direction of represent groundwater flow was East to groundwater flow West. (Fig. 1) soon after • After Hurricane Irene in late Hurricane Irene Future Work August 2011, water was flowing and the blue Continue gathering precipitation outward from the lake in all arrows indicate data and step the model through directions. (Fig. 2) current direction in in smaller increments of time to • In 2012, groundwater East of March, 2012. analyze seasonal effects, among the lake was flowing into the Fig. 2: Pre and Post hurricane Isabel flow patterns (Seger) other effects that impact lake. (Fig. 2) groundwater. Methods Using the modeling software Acknowledgements created by Groundwater Vistas, I I would like to thank OEAS professors built a three dimensional model, Dr. Dobbs and Dr. Whittecar ,teaching using known aquifer properties, assistants Joyce Strain, Ben Hiza, Chris average annual atmospheric data Powell, and the staff of Hoffler Creek and well head data. (Fig. 3) Wildlife Preserve. Fig. 3: Spring 2014 GW contour map with flow directions. Distribution of Microbial Biomass and Bacteria Concentrations in Groundwater Surrounding Lake Ballard Dennis McAlister Ocean, Earth and Atmospheric Sciences, Old Dominion University,2013-2014 Introduction Methods Results This study determined the amount of microbial Total lipid-bound phosphate converted into biomass . Groundwater purging/sampling biomass and bacteria concentrations within from Findlay (1989 Appl. and Environ. Microb. Phospholipid extraction nine different groundwater-monitoring wells 55:2888-2893.) 2:1 DCM:Methanol surrounding Lake Ballard. It was expected that . Epifluoresence Microscopy areas with lower hydraulic conductivity values (calculated last year) would have higher biomass and bacteria values. Figure 4:(Above) Biomass values Figure 3:(Above) Bacteria Concentration Conclusions & Future Work Figure 1:(Above) Graduated circles . Biomass values were not coorelated with showing hydraulic previous hydraulic conductivity values. conductivities and . Bacteria concentrations were not coorelated with their associated conductivity values (from murray 2013) (likely values below from due to bacteria attached to sediment) (Murray 2013 ODU . See how Bacteria groundwater concentrations OEAS 442W) are related to the lake concentrations. Repeat the study to establish better Figure 2:(Right) Biomass values interpolated understanding of values and temporal changes between monitoring wells using ArcGIS Acknowledgements Thank you to Dr. Harvey, Dr. Dobbs, Dr. Whittecar, Karen Taylor, Ben Hiza, Chris Powell, Joyce Strain, and Hoffler Creek Wildlife Preserve. QUICK DESIGN GUIDE Transport and Atmospheric Deposition of Nitrogen and Sulfate to QUICK TIPS (--THIS SECTION DOES NOT PRINT--) (--THIS SECTION DOES NOT PRINT--) This PowerPoint template requires basic PowerPoint Lake Ballard (version 2007 or newer) skills. Below is a list of This PowerPoint 2007 template produces a 36”x56” commonly asked questions specific to this template. professional poster. It will save you valuable time Akilah Nikisha Matthews If you are using an older version of PowerPoint some placing titles, subtitles, text, and graphics. template features may not work properly. Ocean, Earth, and Atmospheric Sciences. Old Dominion University Norfolk, VA, 23529 Use it to create your presentation. Then send it to Using the template PosterPresentations.com for premium quality, same Abstract Results continued Conclusion and Discussion Verifying the quality of your graphics day affordable printing. Results Go to the VIEW menu and click on ZOOM to set your preferred magnification. This template is at 100% the The purpose of this study is to examine the wet and dry The formation of water droplets around size of the final poster. All text and graphics will be We provide a series of online tutorials that will deposition of nitrogen and sulfate within the nitrogen compounds in the atmosphere weighs printed at 100% their size. To see what your poster guide you through the poster design process and atmospheric sampler. My objective is to determine a them down to the ground faster whereas, snow answer your poster production questions. weigh them down to the ground slower. will look like when printed, set the zoom to 100% relationship between the levels of nitrogen and sulfate and evaluate the quality of all your graphics before deposition based on where the air masses originated Base on Figure 1 and Figure 2 the total nitrogen View our online tutorials at: levels for wet and dry fluctuate base on the air you submit your poster for printing. using NOAA’s HYSPLIT. The focus area of this study is http://bit.ly/Poster_creation_help masses, the collection period, and amount of Lake Ballard located within the Hoffler Creek Wildlife Using the placeholders (copy and paste the link into your web browser). precipitation occurred. Preserve in Portsmouth, VA. Samples were collected To add text to this template click inside a and analyzed for total nitrogen, nitrate, nitrite, Majority of total nitrogen constituent by placeholder and type in or paste your text. To move For assistance and to order your printed poster call ammonium, and sulfate during wet and dry deposition inorganic nitrogen, mainly nitrate and a placeholder, click on it once (to select it), place PosterPresentations.com at 1.866.649.3004 between October 2, 2013 – February 14, 2014. An air ammonium that is why there is only one figure your cursor on its frame and your cursor will change showing total nitrogen. mass back – trajectory was utilized to discover the to this symbol: Then, click once and drag it to sources of nitrogen that made contact within the Majority of the air masses our continental polar its new location where you can resize it as needed. which partial explains why the nitrogen and Additional placeholders can be found on the left side atmospheric sampler. Figure 1. Shows the total nitrogen for wet and dry Object Placeholders sulfate deposition were low and the mix air of this template. deposition from October 2, 2013 – February 14, 2014. Methods masses for the October 2-7 was high for both Also showing the precipitation amounts on the right nitrogen
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