Unified Interior Regions
Region 4: Mississippi Basin
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Classifying Coastal Wetland Vegetation Communities with Unsupervised Artificial Neural Networks
Wetlands are often classified by their vegetation, which can help scientists track how these landscapes change over time. USGS turns to unsupervised artificial neural networks to help guide this classification process.
Mapping Oil in Marshes and Its Implications
Remote sensing helps USGS scientists detect and map surface oil in coastal environments.
Optical and Radar Fusion: Mapping Coastal Marsh Dieback
With the help of remote sensing, USGS maps the progression of marsh dieback along the Louisiana coast.
Testing for Agricultural Runoff in the Missouri River - Video
Ride along as USGS scientists Richard Coupe and Joe Schatz sample the Missouri River near Hermann, Missouri. To view the video click here.
Agriculture - A River Runs Through It
Heather Welch, Claire Rose, and Richard Coupe, U.S. Geological Survey scientists involved in the National Water Quality Assessment (NAWQA) Study of Agricultural Chemical Transport (ACT) study, outline agricultural effects on water quality in the Mississippi Delta region. Topics include research results on nutrient modeling using the SPARROW model, environmental effects of biofuel production,...
We've Got A Model - Why Do We Need Data?
Anne Hoos and Ana Garcia discuss why data is important for the USGS nutrient loading model SPARROW. To view the video click here.
Modeling - The Ninth Art - Video
The art and science of SPARROW modeling. The steps of developing the SPARROW model. The other eight arts are: Architecture, Sculpture, Painting, Music, Poetry, Dance, Theater and Cinema. To view the video click here.
Results of the ACT Study - Biofuels
Interview by Richard Coupe (U.S. Geological Survey) and Heather Welch -- a scientist involved in the National Water Quality Assessment (NAWQA) Study of Agricultural Chemical Transport (ACT)-- on her research results on environmental effects of biofuel production. To view the video click here.
Results of the ACT Study - Glyphosphate
Richard Coupe (U.S. Geological Survey) summarizes research results of glyphosate and water quality as part of the the National Water Quality Assessment (NAWQA) Study of Agricultural Chemical Transport (ACT). To view the video click here.
Thoughts from ACT Study Farmers - Lawrence Murphy
Claire Rose (USGS) and Richard Coupe (USGS) talk with Lawrence Murphy about farming and Agricultural Chemical Transport Study research done on his farm in the Mississippi Delta. To view the video click here.
Results of the ACT Study - Metolachlor
Interview by Richard Coupe (US Geological Survey) of Claire Rose- a scientist involved in the National Water Quality Assessment (NAWQA) Study of Agricultural Chemical Transport (ACT)on research results of metolachlor transport. To view the video click here.
Implementation of the U.S. Geological Survey's StreamStats Program in Arkansas -- A Web Application for Streamflow Statistics and Basin Characteristics
Short Title: Arkansas StreamStats Implementation
Project Chief: Aaron Pugh
Cooperator: U.S. Army Corps of Engineers - Little Rock District, Arkansas Natural Resources Commission, ...
Characteristics for the external identification of Black Carp from Grass Carp
Black Carp Mylopharyngodon piceus and Grass Carp Ctenopharyngodon idella are morphologically similar species native to eastern Asia and imported to North America as biological control organisms. Preferred identification methods are coloration and pharyngeal tooth form. Grass Carp possess serrated teeth and Black Carp molariform...
Kroboth, Patrick; Chapman, Duane C.; Hrabik, Robert A.; Neely, D.A.
Evaluating associations between environmental variables and Escherichia coli levels for predictive modeling at Pawtuckaway Beach in Nottingham, New Hampshire, from 2015 to 2017
From 2015 through 2017, the U.S. Geological Survey in cooperation with the New Hampshire Department of Health and Human Services and the New Hampshire Department of Environmental Services studied occurrences of high levels of Escherichia coli (E. coli) bacteria at the Pawtuckaway State Park Beach in Nottingham, New Hampshire. Historic data...
Coles, James F.; Kathleen F. Bush Using δ13C and δ18O to analyze loblolly pine (Pinus taeda L.) response to experimental drought and fertilization
Drought frequency and intensity are projected to increase throughout the southeastern USA, the natural range of loblolly pine (Pinus taeda L.), and are expected to have major ecological and economic implications. We analyzed the carbon and oxygen isotopic compositions in tree ring cellulose of loblolly pine in a factorial drought (~30% throughfall...
Lin, Wen; Domec, Jean-Christophe; Ward, Eric; Marshall, John D.; King, John S; Laviner, Marshall A.; Fox, Thomas R; West, Jason B.; Sun, Ge; McNulty, Steve G; Noormets, Asko
Potentiometric surface of groundwater-level altitudes near the planned Highway 270 bypass, east of Hot Springs, Arkansas, July–August 2017
The Ouachita Mountains aquifer system potentiometric-surface map is one component of the Hot Springs Bypass Groundwater Monitoring Project. The potentiometric-surface map provides a baseline assessment of shallow groundwater levels and flow directions before the construction of the Arkansas Department of Transportation planned extension of the...
Nottmeier, Anna M.; Hays, Phillip D.
Instructions for running the analytical code PAT (Purge Analyzer Tool) for computation of in-well time of travel of groundwater under pumping conditions
IntroductionUnderstanding the optimal time needed to purge a well while pumping to collect a representative groundwater sample requires an understanding of groundwater flow in wells (in-well flow). Parameters that affect in-well flow include the hydraulic properties of the aquifer, well construction, drawdown from pumping, and pump rate. The time...
Harte, P.T.; Huffman, B.J.; Perina, Tomas; Levine, Herb; Rojas-Mickelson, Daewon The importance of natural versus human factors for ecological conditions of streams and rivers
Streams are influenced by watershed-scale factors, such as climate, geology, topography, hydrology, and soils, which mostly vary naturally among sites, as well as human factors, agriculture and urban development. Thus, natural factors could complicate assessment of human disturbance. In the present study, we use structural equation modeling and...
Tang, Tao; Stevenson, R. Jan; Grace, James Estimating the value of mangrove leaf litter in sesarmid crab diets: The importance of fractionation factors
Sesarmid crabs play an important role in organic matter and carbon cycling of mangrove forests. Visual observations and gut content studies have verified that sesarmid crabs are feeding on mangrove leaves, yet stable isotopes of carbon and nitrogen (13C and 15N) have indicated that leaf litter is not assimilated as a food source. Sesarmid...
MacKenzie, R.A.; Cormier, N.; Demopoulos, Amanda
2019 Disaster Relief Act: USGS recovery activities
The Additional Supplemental Appropriations for Disaster Relief Act of 2019 (H.R. 2157) was signed by the President on June 6, 2019. The U.S. Geological Survey received $98.5 million for repair and replacement of facilities and equipment, collection of high-resolution elevation data in affected areas, and scientific assessments to support recovery...
Hinck, Jo Ellen; Stachyra, Joseph Serum iron analytes in healthy and diseased Florida manatees (Trichechus manatus latirostris)
Serum iron concentration is usually decreased in true iron deficiency and with inflammatory disease in man and domestic animals. Serum total iron binding capacity (TIBC) may be increased in true iron deficiency and decreased with inflammatory disease. This prospective study was designed to measure serum iron analytes in healthy free-ranging and...
Harvey, John W.; Harr, Kendal E; Murphy, David; Walsh, Michael T.; deWit, Martine; Deutsch, Charles J.; Bonde, Robert The potential resiliency of a created tidal marsh to sea-level rise
The purpose of this study was to determine the elevation dynamics of a created tidal marsh on the North Carolina coast. Deep rod surface elevation tables (RSET) and feldspar marker horizons (MH) were installed in plots to measure net surface elevation changes and to quantify contributing processes. Twelve total plots were placed on four elevation...
Kamrath, Brock J. W.; Burchell, Michael R.; Cormier, Nicole; Krauss, Ken W.; Johnson, Darren Genetic Characterization of Non-Native African Jewelfish, Hemichromis letourneuxi Sauvage 1880, in Florida
The African Jewelfish, Hemichromis letourneuxi, is an invasive, predatory cichlid fish introduced at least once to Florida. Its native range is in northern Africa. First encountered in Miami in the 1960s, it has since been found west and north within the State of Florida. It thrives in a wide range of aquatic habitats, including shallow,...
Belfiore, Natalia M.; Schofield, Pamela J.
Columbia Environmental Research Center
The U.S. Geological Survey Columbia Environmental Research Center performs research to solve challenging environmental problems related to contaminants and habitat alterations in aquatic and terrestrial ecosystems. The research is interdisciplinary and pursued through partnerships within the U.S. Geological Survey and with national, international...
Flooding and Train Derailment in Northwest Iowa
The Rock River flooded parts of northwest Iowa after several days of heavy rainfall in June 2018. A train carrying crude oil derailed over a flooded bridge south of Doon on June 22, prompting evacuations of nearby homes. Landsat 8 images from June 1 and June 24 show the extent of the flooding.
New Map Turtle in Louisiana and Mississippi
USGS researchers discovered a new species of turtle. The Pearl River map turtle makes its home in the Pearl River of Louisiana and Mississippi.
Land-Cover Modeling - Alexandria, Louisiana - B2 Scenario
Alexandria, Louisiana
2006 to 2050 Land-cover Change
IPCC SRES B2 Scenario
The IPCC SRES B2 scenario focuses on environmentally friendly lifestyles and local solutions to social and environmental problems. The emphasis on regional self-reliance results in a desire for local food and energy products. Environmental impacts on the
...
Studying Louisiana Marshland
Dr. Lee Foote, National Wetlands Research Center, studies a Louisiana marshland.
USGS Measures Flooding in Louisiana
USGS scientists Paul Frederick and Mike Descant make sure there is enough clearance for their boat to drive under a bridge on the Atchafalaya River near Melville, La.
Missouri River at Hermann, MO (06934500)
The webcam is located on a gaging station (06934500) on the Missouri River in Hermann, MO. View the current conditions at the gaging station.
Louisiana Black Bear and Cubs
A threatened Louisiana black bear and her cubs up in a tree.
U.S. Geological Survey scientists report that preliminary analysis of satellite data indicate Hurricane Katrina caused substantial marsh loss in St. Bernard and Plaquemines parishes.
The USGS is releasing today a 25-minute videotape of footage showing coastal impacts resulting from Hurricane Katrina along the coastline of the northern Gulf of Mexico.
The USGS is releasing today a 25-minute videotape of footage showing coastal impacts resulting from Hurricane Katrina along the coastline of the northern Gulf of Mexico.
The USGS has posted aerial photos from the northern Gulf of Mexico coastline showing before and after conditions in response to Hurricane Katrina. The photos show five photo pairs of the Chandeleur Islands, Louisiana, and three photo pairs of Dauphin Island, Alabama. A set of ‘quick response’ photos from Bay St. Louis to Biloxi, Mississippi are also posted.
The USGS has posted aerial photos from the northern Gulf of Mexico coastline showing before and after conditions in response to Hurricane Katrina. The photos show five photo pairs of the Chandeleur Islands, Louisiana, and three photo pairs of Dauphin Island, Alabama. A set of ‘quick response’ photos from Bay St. Louis to Biloxi, Mississippi are also posted.
"The past several days have seen remarkable devastation resulting from Hurricane Katrina. Our thoughts and prayers are with everyone who has been affected by this disaster," said USGS Acting Director Pat Leahy. "In the aftermath of Katrina, USGS research on hurricanes and natural hazards is no longer just a scientific endeavor – it is a matter of public safety."
"The past several days have seen remarkable devastation resulting from Hurricane Katrina. Our thoughts and prayers are with everyone who has been affected by this disaster," said USGS Acting Director Pat Leahy. "In the aftermath of Katrina, USGS research on hurricanes and natural hazards is no longer just a scientific endeavor – it is a matter of public safety."
The U.S. Geological Survey’s National Wetlands Research Center, headquartered in Lafayette, La., is responding to both humanitarian and scientific needs of people and agencies involved in the devastating aftermath of Hurricane Katrina.
Did you know that from your desk you can monitor the effect of Hurricane Katrina as it moves inland? The U.S. Geological Survey’s (USGS) WaterWatch Web site can show you what’s happening to streams in your local area and show you the places most affected by heavy rains expected from this storm.
In its latest report on water use in the United States, the USGS looked at the nation's dependence on ground water. The report entitled Estimated Withdrawals from Principal Aquifers in the United States, 2000, provides details of ground-water withdrawals and use from principal aquifers in each state.
The preliminary magnitude 4.1 earthquake that shook eastern Arkansas and western Tennessee at 8:04 a.m. Central Standard Time is cited by the U.S. Geological Survey (USGS) as yet another wake-up call to the central United States about the serious potential for earthquakes, the hazard it poses to those living in the region, and the need to strengthen the region’s buildings and structures.
The preliminary magnitude 4.1 earthquake that shook eastern Arkansas and western Tennessee at 8:04 a.m. Central Standard Time is cited by the U.S. Geological Survey (USGS) as yet another wake-up call to the central United States about the serious potential for earthquakes, the hazard it poses to those living in the region, and the need to strengthen the region’s buildings and structures.
Contacts
Locations
Region 4: Mississippi Basin
Fork Polk Project Office
Phone: (337) 531-4522 Fax:
Fax: (337) 531-6039
Louisiana Water Science Center
Phone: (225) 298-5481
Fax: (225) 298-5490
Arkansas Water Science Center
Phone: (501) 228-3600
Fax: (501) 228-3601
Ruston Program Office
Phone: (318) 251-9630
Fax: (318) 251-0372
Missouri Water Science Center
Phone: 573-308-3667
Fax: (573) 308-3645
National Geospatial Technical Operations Center - Rolla, MO
Iowa Water Science Center
Phone: 319-337-4191
Fax: (319) 358-3606
Lower Mississippi-Gulf Water Science Center - Little Rock, AR Office
Phone: (501) 228-3600
Lower Mississippi-Gulf Water Science Center - Jackson, MS Office
Phone: (601) 933-2900
Fax: (601) 933-2901
Lower Mississippi-Gulf Water Science Center - Baton Rouge, LA Office
Phone: (225) 298-5481
Fax: (225) 298-5490
Wetland and Aquatic Research Center - Lafayette, LA
Phone: 337-266-8500
Fax: 337-266-8513
Columbia Environmental Research Center
Phone: 573-875-5399
Western Iowa Field Office - Council Bluffs
Phone: 712-323-0824
Fax: 712-322-7775
Central Iowa Field Office - Fort Dodge
Phone: 515-576-4571
Fax: 515-576-1692
Lower Mississippi-Gulf Water Science Center - Ruston, LA Office
Phone: (318) 251-9630
Lower Mississippi-Gulf Water Science Center - Fayetteville, AR Office
Phone: (479) 442-4888
Western Missouri Field Office - Lee's Summit
Phone: 816-554-3489
Fax: 816-554-9273
Eastern Missouri - Olivette
Phone: 314-567-7077 or 314-567-5440
Fax: 314-567-7641
