Unified Interior Regions

Region 2: South Atlantic-Gulf (Includes Puerto Rico and the U.S. Virgin Islands)

Regions L2 Landing Page Tabs

Filter Total Items: 365
Date published: September 22, 2012

U.S. Geological Survey Flood Inundation Mapping Science

Static flood-inundation map libraries consist of maps that have been created in advance of a flood that are ready to be served through the Internet. Each library consists of a set of flood extent and depth maps developed for predetermined stream stage intervals (for example, a map for each one foot of stage). A user can view real-time or forecast stage data from a USGS streamgage or National...

Date published: September 22, 2012

USGS StreamStats

StreamStats is a Web-based tool that provides streamflow statistics, drainage-basin characteristics, and other information for USGS streamgaging stations and for user-selected ungaged sites on streams. When users select the location of a streamgaging station, StreamStats provides previously published information from a database. When users select a site on an ungaged stream, StreamStats will...

Date published: April 13, 2012

Predicting ecological flow regime at ungaged sites: A comparison of methods

Nineteen ecologically relevant streamflow characteristics were estimated using published rainfall–runoff and regional regression models for six sites with observed daily streamflow records in Kentucky. The regional regression model produced median estimates closer to the observed median for all but two characteristics. The variability of predictions from both models was generally less than the...

Date published: September 22, 2011
Status: Active

Terrestrial Light Detection and Ranging (T-LiDAR) Technology

T-LiDAR technology utilizes reflected laser pulses sent from a tripod-mounted scanning instrument to determine distances to targets of interest. The resulting dataset is a 3 dimensional model or "point cloud" of millions of XYZ data points, spaced only a few millimeters apart. This highly detailed dataset is used by USGS scientists to create topographic models, make detailed measurements, and...

Date published: September 2, 2011
Status: Active

Historical Preservation of Toomer's Oaks in Auburn, AL

The live oaks framing Toomer's Corner in Auburn, Alabama were planted about 1880 and have served as a focal point for Auburn celebrations in recent decades. The trees recently received a powerful dose of an herbicide known as Spike 80DF. In an effort to save the trees, a task force made up of university horticulturists, landscapers, agronomists, engineers, chemists and others has undertaken a...

Contacts: Dr. Luke Marzen
Date published: September 26, 2010
Status: Active

Coastal Plain Culvert Study

Various environmental groups in Alabama are concerned that the use of culverts at highway crossings to convey stream flows has detrimental effects on the natural conditions of streams. Specifically, some groups are concerned that changes in stream geomorphology, sediment concentrations, and associated turbidity adversely impact the benthic macroinvertebrate community when culverts are...

Date published: July 14, 2009

Quality of Shallow Groundwater and Drinking Water in the Mississippi Embayment-Texas Coastal Uplands Aquifer System and the Mississippi River Valley Alluvial Aquifer, South-Central United States, 1994–2004

The Mississippi embayment-Texas coastal uplands aquifer system is an important source of drinking water, providing about 724 million gallons per day to about 8.9 million people in Texas, Louisiana, Mississippi, Arkansas, Missouri, Tennessee, Kentucky, Illinois, and Alabama. The Mississippi River Valley alluvial aquifer ranks third in the Nation for total withdrawals of which more than 98...

Date published: April 17, 2009

Integrative Studies of Florida Spring Ecosystems

Florida's springs are a source of cultural, recreational, and ecological importance. But land-use changes and increased demands for groundwater due to the state's growing population have led to widespread impairment of these unique ecosystems. 

Date published: January 21, 2009

Digital Hydrogeologic Surface and Thickness of the Mississippi Embayment Regional Aquifer Study (MERAS)

Short Title: MERAS Framework

Project Chief: Rheannon Hart

Cooperator: U.S. Geological Survey Office of Ground-Water Resources Program

Project Time Frame: January 2006 - 2009

A hydrogeologic framework for a ground-water flow model is under development as part...

Contacts: Rheannon M Hart
Date published: January 1, 2009

Lower Mississippi River National Rivers and Streams Assessment

Short Title: Mississippi River NRSA

Project Chief: Billy Justus

Cooperator: U.S. Environmental Protection Agency

Project Time Frame: 2008 - 2009

The USGS Arkansas and Missouri Water Science Centers (WSC) are conducting a study for the U.S. Environmental...

Contacts: Billy G Justus
Date published: January 7, 2005
Status: Active

Environmental Monitoring and Assessment of Fivemile Creek at Tarrant, AL

The Black Warrior - Cahaba Rivers Land Trust and City of Tarrant (as part of the Fivemile Creek Greenway Partnership) are among the new USGS cooperators for 2003 -04. These organizations are spearheading an effort to restore Fivemile Creek in Jefferson County to its place as an important asset in daily lives for those who live and work along the creek in northern Jefferson County. The Greenway...

Date published: January 7, 2005
Status: Completed

Water Use in Alabama, by Watershed, 2005

Water is one of the most important of Alabama's natural resources. Water is not only a vital component of human existence, it is critical to the overall quality of life. In order to protect and preserve this resource for future generations, we must have a baseline of information to make decisions. Decision and policy makers must know the answers to three fundamental questions: where is the...

Filter Total Items: 5,256
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Year Published: 2019

Standardizing a non-lethal method for characterizing the reproductive status and larval development of freshwater mussels (Bivalvia: Unionoida)

Actively monitoring the timing, development, and reproductive patterns of endangered species is critical when managing for population recovery. Freshwater mussels are among the most imperiled organisms in the world, but information about early larval (glochidial) development and brooding periods is still lacking for many species. Previous studies...

Beaver, Caitlin; Geda, Susan; Johnson, Nathan

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Year Published: 2019

Prediction and inference of flow-duration curves using multi-output neural networks

We develop multi-output neural network models (MNNs) to predict flow-duration curves (FDCs) in 9,203 ungaged locations in the Southeastern United States for six decades between 1950-2009. The model architecture contains multiple response variables in the output layer that correspond to individual quantiles along the FDC. During training,...

Worland, Scott C.; Steinschneider, Scott; Asquith, William H.; Knight, Rodney; Wieczorek, Michael E.

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Year Published: 2019

Coastal Salinity Index along the southeastern Atlantic coast and the Gulf of Mexico, 1983 to 2018

Coastal droughts have a different dynamic than upland droughts, which are typically characterized by agricultural, hydrologic, meteorological, and (or) socioeconomic effects. Drought uniquely affects coastal ecosystems because of changes in the salinity conditions of estuarine creeks and rivers. The location of the freshwater-saltwater interface...

Petkewich, Matthew; Lackstrom, Kirsten; McCloskey, Bryan J.; Rouen, Lauren F.; Conrads, Paul A.
Petkewich, M.D., Lackstrom, K., McCloskey, B.J., Rouen, L.F., and Conrads, P.A., 2019, Coastal Salinity Index along the southeastern Atlantic coast and the Gulf of Mexico, 1983 to 2018: U.S. Geological Survey Open-File Report 2019–1090, 26 p., https://doi.org/10.3133/ofr20191090.

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Year Published: 2019

Wetland biomass and productivity in Coastal Louisiana: Base line data (1976-2015) and knowledge gaps for the development of spatially explicit models for ecosystem restoration and rehabilitation initiatives

Coastal Louisiana host 37% of the coastal wetland area in the conterminous US, including one of the deltaic coastal regions more susceptible to the synergy of human and natural impacts causing wetland loss. As a result of the construction of flood protection infrastructure, dredging of channels across wetlands for oil/gas exploration and maritime...

Rivera-Monroy, Victor H.; Elliton, Courtney; Narra, Siddhartha; Meselhe, Ehab; Zhao, Xiaochen; White, Eric; Sasser, Charles E.; Visser, Jenneke M.; Meng, X.; Wang, Hongqing; Xue, Zuo; Jaramillo, Fernando

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Year Published: 2019

Environmental DNA (eDNA) detection of nonnative bullseye snakehead in southern Florida

Bullseye Snakehead Channa marulius (Hamilton 1822) was first detected in the southern Florida town of Tamarac in 2000 and has been expanding its geographic range since. Environmental DNA (eDNA) analysis is a newly-developed technique used to noninvasively detect cryptic or low-density species or those that are logistically difficult-to-study....

Hunter, Margaret; Schofield, Pam; Meigs-Friend, Gaia; Brown, Mary; Ferrante, Jason

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Year Published: 2019

Hemidactylus parvimaculatus (Sri Lankan spotted house gecko)

USA: LOUISIANA: PLAQUEMINES PARISH: 0.15 km S of the intersection of LA-23 and Jump  road, Venice (29.266630°N, 89.35570°W; WGS 84). 2 May 2019. V. C. Montross and W. McGighan. Verified by Aaron M. Bauer. Florida Museum of Natural History (UF 189238; photo voucher). New parish record. On 2 May 2019, three Hemidactylus parvimaculatus were...

Pellacchia, C. M.; Glorioso, Brad M.; Mendyk, R. W.; Collen, C. A.; Montross, V. C.; McGighan, W.; Macedo, K.; Maldonado, B. R.; Morenc, I. N.

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Year Published: 2019

Snakehead fishes (Channa spp.) in the USA

The introduction of snakeheads from their origins in Asia is relatively recent to the conterminous United States with the first of many collections beginning in the late 1990s. For decades they have been commercially fished and aquacultured around the world for human food and, to a lesser degree, for the aquarium trade. Over a dozen snakehead...

Benson, Amy

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Year Published: 2019

Discoveries and novel insights in ecology using structural equation modeling

As we enter the era of data science (Lortie 2018), quantitative analysis methodologies are proliferating rapidly, leaving ecologists with the task of choosing among many alternatives. The use of structural equation modeling (SEM) by ecologists has increased in recent years, prompting us to ask users a number of questions about their experience...

Laughlin, Daniel C.; Grace, James

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Year Published: 2019

The hydrologic system of the south Florida peninsula—Development and application of the Biscayne and Southern Everglades Coastal Transport (BISECT) model

The Biscayne and Southern Everglades Coastal Transport (BISECT) model was developed by the U.S. Geological Survey under the Greater Everglades Priority Ecosystem Studies Initiative to evaluate, both separately and in conjunction, the likely effects on surface-water stages and flows, hydroperiod, and groundwater levels and salinity in south Florida...

Swain, Eric D.; Lohmann, Melinda A.; Goodwin, Carl R.
Swain, E.D., Lohmann, M.A., and Goodwin, C.R., 2019, The hydrologic system of the south Florida peninsula—Development and application of the Biscayne and Southern Everglades Coastal Transport (BISECT) model: U.S. Geological Survey Scientific Investigations Report 2019–5045, 114 p., https://doi.org/10.3133/sir20195045.

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Year Published: 2019

The importance of turtle populations to wetland restoration in the upper Mississippi embayment of the Mississippi Alluvial Valley

The Upper Mississippi Embayment (UME) ecoregion covers approximately 141,895 km2 and historically supported 9,712,455 ha of bottomland deciduous forests, swamps, bayous, and rivers. Only about 500 ha (< 0.01%) of pre-settlement bottomland hardwood forest habitat in the Mississippi Alluvial Valley (MAV) in the UME remained by the 1940s because...

Nickerson. Max A; Mitchell, Joseph C.; Glorioso, Brad

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Year Published: 2019

Map of the approximate inland extent of saltwater at the base of the Biscayne aquifer in Miami-Dade County, Florida, 2018

The inland extent of saltwater at the base of the Biscayne aquifer in eastern Miami-Dade County, Florida, was mapped in 2011, and it was mapped in the Model Land Area in 2016. The saltwater interface has continued to move inland in some areas and is now near several active well fields. An updated approximation of the inland extent of saltwater has...

Prinos, Scott T.
Prinos, S.T., 2019, Map of the approximate inland extent of saltwater at the base of the Biscayne aquifer in Miami-Dade County, Florida, 2018: U.S. Geological Survey Scientific Investigations Map 3438, 10-p. pamphlet, 1 sheet, https://doi.org/10.3133/sim3438.

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Year Published: 2019

Estimated use of water in the Cumberland River watershed in 2010 and projections of public-supply water use to 2040

The U.S. Army Corps of Engineers (USACE), Nashville District, is conducting ongoing water-supply analyses of USACE reservoirs in the Cumberland River watershed to identify areas where potential water-resources issues may arise in the future. To assist the USACE in their efforts, the U.S. Geological Survey, in cooperation with the USACE, collected...

Robinson, John A.
Robinson, J.A., 2019, Estimated use of water in the Cumberland River watershed in 2010 and projections of public-supply water use to 2040: U.S. Geological Survey Scientific Investigations Report 2018–5130, 62 p., https://doi.org/10.3133/sir20185130.

Filter Total Items: 500
October 18, 2009

Marking the Milestone, The Triangle Area Water Supply Monitoring Proj

USGS North Carolina Water Quality Specialist Mary Georgino discusses The Triangle Area Water Supply Monitoring Project.

Water quality sampling, Sope Creek near Atlanta, Georgia.
October 18, 2009

Water quality sampling, Sope Creek near Atlanta, Georgia.

Water quality sampling in a creek, Atlanta, Georgia

Scientists from the USGS South Atlantic Water Science Center are sampling Sope Creek, Cobb County, west of Atlanta, Georgia. 

Chemical and physical consituents can vary from bank to bank even in a small creek like this. Just taking a single sample from a chosen horizontal and

Peachtree Creek, Atlanta, Ga. water monitoring site showing USGS monitoring equipment.
September 23, 2009

Peachtree Creek WaterWatch, Atlanta, Ga. water monitoring site

Peachtree Creek at Atlanta (USGS 02336300) Water Monitoring Site

There are many pieces of equipment, both mechanical and electronic, that are installed at the Peachtree Creek monitoring site to measure, record, and transmit both water-quantity and water-quality information. The U.S. Geological Survey (USGS) monitors "real-time" streamflow and water-

Peachtree Creek, Atlanta, Ga. Sept 2009-Epic flooding results in water overwashing a bridge over the creek.
September 22, 2009

Peachtree Creek, Atlanta, Ga. Sept 2009 - Epic flooding event

Epic flooding conditions at Peachtree Creek, Atlanta, Ga., September 2009.

The picture was taken during the epic September 2009 flooding event, which caused the creek to peak at a 23 foot stage. In this flood, the high water did not happen becuase of the usual circumstances - rain falling upstream of the site accumulating and flowing downstream to this site. Here,

USGS hydrographer preparing to measure streamflow at the Chattahoochee River, GA below Morgan Falls Dam water-monitoring site.
September 21, 2009

Measuring streamflow at the Chattahoochee River, epic Sep 2009 flood

Many days of continuous heavy rain in mid-September have resulted in flooding in many parts of Georgia, especially in north Georgia and the Atlanta region. These rains have been producing streamflows of record proportions.

Here, a USGS hydrographer is preparing to measure streamflow at the Chattahoochee River below Morgan Falls Dam water-monitoring site, Fulton

USGS scientists working during the epic September 2009 flood in Georgia. Power Springs Creek (02336870)
September 21, 2009

USGS scientists measuring Sept. 2009 flooding, Powder Springs Cr, GA

Epic Flooding in Georgia, 2009

Metropolitan Atlanta—September 2009 Floods

  • The epic floods experienced in the Atlanta area in September 2009 were extremely rare. Eighteen streamgages in the Metropolitan Atlanta area had flood magnitudes much greater than the estimated 0.2-percent (500-year) annual exceedance probability.
  • The
Queen angelfish - Hurricane Hole, Virgin Islands
September 18, 2009

Queen angelfish - Hurricane Hole, Virgin Islands

A queen angelfish peers through the safety of the mangrove roots across the rich colors and textures of corals, sponges, urchins, and algae. Queen angelfish feed almost exclusively on sponges, which are abundant in these mangroves.

September 15, 2009

Hurricane Floyd, and the Floods of 1999

USGS North Carolina Water Science Center Director Jerad Bales discusses Hurricane Floyd and flood impacts on North Carolina in 1999.

September 1, 2009

Hurricane Hugo, Storm-surge monitoring techniques, twenty-years later

South Carolina Water Science Center Surface Water Specialist Paul Conrads discusses USGS storm-surge monitoring techniques changes since Hurricane Hugo in 1989.

Ryan Rasmussen and Cassandra Pfeifle, Hydrologic Technicians, collect samples at Little River Reservoir, 2009.
August 19, 2009

Water Sampling at Little River Reservoir, Durham County, NC, 2009.

Ryan Rasmussen and Cassandra Pfeifle, Hydrologic Technicians, collect samples at Little River Reservoir, 2009. 

July 30, 2009

Introduction to USGS Water Science in South Carolina

SC Water Science Center Director Eric W. Strom discusses USGS water science programs in South Carolina, as interviewed by SC Public Radio "Your Day" host, Donna London.

Filter Total Items: 393
January 25, 2001

If the aquarium of brightly colored exotic fish with interesting names like angelfish, swordtail, glow-light tetra, hatchet fish and tire track eel that Aunt Tillie gave you for Christmas is rapidly becoming a burden, think twice before you dump the tank and destroy the evidence.

December 5, 2000

A deadly bird disease, avian vacuolar myelinopathy (AVM), is affecting mallard ducks and coots on Woodlake in North Carolina; coots on Lake Juliette in central Georgia; and coots, bald eagles and -- for the first time -- a Canada goose on Strom Thurmond Lake on the border of South Carolina and Georgia.

October 20, 2000

Scientists from the U.S. Geological Survey in Madison, Wisc., confirmed today that a dead crow, found in Chatham County, N.C., near the town of Moncure died of the West Nile Virus. The finding marks the farthest south the virus has been identified. Moncure is about 40 miles southwest of Raleigh.

March 3, 2000

A new population of non-native Asian swamp eels, a highly adaptable predatory fish, has been found near the eastern border of Everglades National Park in the area of Homestead, Fla.

November 19, 1999

Although Hurricane Lenny brought high winds and heavy rains to Puerto Rico, residents in the vicinity of Lago La Plata were spared the hazards and inconveniences of an unnecessary evacuation Wednesday morning, in part because of the efforts of U.S. Geological Survey Caribbean District Office personnel in advance of, and during the storm.

October 21, 1999

Due to an unprecedented decision by the U.S. Geological Survey representative in Puerto Rico, two USGS employees in Guaynabo have actually moved to the city’s civil defense facility and will remain there until the latest in a series of hurricanes (Jose) no longer appears to threaten the lives and property of the residents of Puerto Rico and the Virgin Islands.

October 19, 1999

Today, as Hurricane Jose was upgraded from a tropical storm, the U. S. Geological Survey in Puerto Rico was monitoring the storm’s path and intensity very closely. If the hurricane threatens Puerto Rico later this week, as predicted, the USGS is prepared to provide critical information to local government and emergency management officials responsible for protecting the lives and property of Puert

September 29, 1999

While navigating the treacherous floodwaters in North Carolina to measure the rising water caused by Hurricane Floyd, U.S. Geological Survey scientists rescued four citizens threatened by the storm.

September 23, 1999

While much of eastern North Carolina remains under water, U.S. Geological Survey scientists and hydrologic technicians are boating over rooftops, submerged cars, and bridges and roads topped by deep water to collect data and determine the amount of environmental damage done by Hurricane Floyd’s heavy rains.

September 21, 1999

Flood levels from Hurricane Floyd exceeded those from Hurricane Fran, which occurred in September 1996.Preliminary assessments indicate that flood levels in much of the Tar River Basin were at the 500-year recurrence interval. (500-year flood flow has a 0.2-percent chance of being equalled or exceeded during any given year at a particular location.)

September 20, 1999

River stage and streamflow data--The U.S. Geological Survey (USGS) collects river stage and streamflow data at more than 200 sites across North Carolina. Near real-time data at most sites are transmitted via satellite to a central data base that compiles current and historical data.

September 17, 1999

USGS scientists from the Patuxent Wildlife Research Center, the National Wetlands Research Center and the Florida and Caribbean Science Center are gearing up to assess Hurricane Floyd damage to wildlife and habitat from Florida to Maine.

Follow Region 2 activities on social media, get contact information for Region 2 USGS centers, and meet Region 2's staff and center directors.