Unified Interior Regions

Region 4: Mississippi Basin

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Filter Total Items: 238
Date published: March 15, 2018
Status: Active

Webinar: Projecting Climate Change Impacts on Wetland-Dependent Birds in the Prairie Pothole Region

View this webinar to learn how scientists are projecting the impacts of climate change on birds in the Prairie Pothole Region.

Date published: February 27, 2018
Status: Active

Paleoceanographic Proxy Calibration

A sediment trap time series in the northern Gulf of Mexico is used to better assess the control of environmental variables (e.g., temperature and salinity) on the flux of both microfossils and molecular fossils to the sediments. The information gained from sediment trap studies is used to develop better proxy-based estimates of past oceanographic conditions from analyses of microfossils and ...

Date published: February 22, 2018
Status: Active

Climate and Environmental Change in the Gulf of Mexico and Caribbean

This project documents paleoceanographic, climatic, and environmental changes in the Gulf of Mexico and adjacent land areas over the last 10,000 years. The paleoenvironmental data is used to determine rates of change in the past, and to better understand both the natural and anthropogenic factors that contribute to climate variability on inter-annual to millennial timescales.

Date published: February 8, 2018
Status: Active

Louisiana Barrier Island Habitat Mapping and Change Assessment

Barrier islands provide numerous invaluable ecosystem goods and services including storm protection and erosion control for the mainland, habitat for fish and wildlife, salinity regulation in estuaries, carbon sequestration in marshes, recreation, and tourism. These islands are dynamic environments due to their position at the land-sea interface. Storms, wave energy, tides, currents, and...

Date published: January 23, 2018
Status: Active

Scenario-Based Assessments for Coastal Change Hazard Forecasts

A decade of USGS research on storm-driven coastal change hazards has provided the data and modeling capabilities needed to identify areas of our coastline that are likely to experience extreme and potentially hazardous erosion during an extreme storm.

Contacts: Kara Doran
Date published: January 18, 2018
Status: Active

Forecasting Coastal Change

This project focuses on understanding the magnitude and variability of extreme storm impacts on sandy beaches. The overall objective is to improve real-time and scenario-based predictions of coastal change to support management of coastal infrastructure, resources, and safety. 

Contacts: Kara Doran
Date published: January 18, 2018
Status: Active

National Assessment of Coastal Vulnerability to Sea Level Rise

The original national coastal vulnerability index (CVI) assessment was motivated by expected accelerated sea-level rise (SLR) and the uncertainty in the response of the coastline to SLR. This research was conducted between 1999 and 2001, and is currently being updated using new data sources and methodology. This original study was part of the ...

Date published: January 18, 2018
Status: Active

Long-Term Coastal Change

Goals of this task include developing and improving coastal-change assessments and supporting long-term planning and decision making to ensure sustainable coastal economies, infrastructure, and ecosystems.

Date published: January 12, 2018
Status: Active

Barrier Island Comprehensive Monitoring

Historical and newly acquired data were used to assess and monitor changes in the aerial and subaqueous extent of islands, habitat types, sediment properties, environmental processes, and vegetation composition.

Date published: January 10, 2018
Status: Active

Integrating Mapping and Modeling to Support the Restoration of Bird Nesting Habitat at Breton Island National Wildlife Refuge

In response to storms, reduced sediment supply, and sea-level rise, Breton Island is rapidly deteriorating, impacting the available nesting habitat of endangered seabirds. This study provides critical information regarding the physical environment of the island system. 

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Year Published: 2021

Population density and stream-habitat relations of the Yellowcheek Darter (Nothonotus moorei) among the headwaters of the Little Red River in Arkansas

Nothonotus moorei (Yellowcheek Darter [YCD]) is an endangered species endemic to the headwaters of the Little Red River in north-central Arkansas. Population decline, habitat loss and fragmentation, and threats from land use and seasonal drought necessitate monitoring of population density and distribution to determine ecological and habitat...

Driver, Lucas; Justus, Billy

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Year Published: 2021

Assessment of peak flow scaling and Its effect on flood quantile estimation in the United Kingdom

Regional flood frequency analysis (RFFA) methods are essential tools to assess flood hazard and plan interventions for its mitigation. They are used to estimate flood quantiles when the at‐site record of streamflow data is not available or limited. One commonly used RFFA method is the index flood method (IFM), which assumes that peak floods...

Formetta, Giuseppe; Over, Thomas M.; Stewart, Elizabeth

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Year Published: 2021

Simulation of dissolved organic carbon flux in the Penobscot Watershed, Maine

Dissolved organic carbon (DOC) is an important component of the carbon cycle as a measure of the hydrological transport of carbon between terrestrial carbon pools into soil pools and eventually into streams. As a result, changes in DOC in rivers and streams may indicate alterations in the storage of terrestrial carbon. Exploring the complex...

Rouhani, Shabnam; Schaaf, Crystal B.; Huntington, Thomas; Choate, Janet

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Year Published: 2021

Isolating the AFFF signature in coastal watersheds using oxidizable PFAS precursors and unexplained organofluorine

Water supplies for millions of U.S. individuals exceed maximum contaminant levels for per- and polyfluoroalkyl substances (PFAS). Contemporary and legacy use of aqueous film forming foams (AFFF) is a major contamination source. However, diverse PFAS sources are present within watersheds, making it difficult to isolate their predominant origins....

Ruyle, Bridger J; Pickard, Heidi M.; LeBlanc, Denis R.; Tokranov, Andrea K.; Thackray, Colin P.; Hu, Xindi C.; Vecitis, Chad D.; Sunderland, Elsie M.

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Year Published: 2021


Lake charr Salvelinus namaycush are typically fall spawners although one ecotype has populations that spawn during spring and fall (siscowets in Lake Superior). Lake charr are iteroparous (reproduce more than once in a lifetime) with group-synchronous ovarian development and typically spawn once per year. However, lake charr may not...

W. Goetz, Frederick; Marsden, J. Ellen; Richter, Catherine A.; Tillitt, Donald E.; Sitar, Shawn P.; Riley, Stephen; Krueger, Charles C.

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Year Published: 2021

Practical field survey operations for flood insurance rate maps

The U.S. Geological Survey assists the Federal Emergency Management Agency in its mission to identify flood hazards and zones for risk premiums for communities nationwide, by creating flood insurance rate maps through updating hydraulic models that use river geometry data. The data collected consist of elevations of river channels, banks, and...

Taylor, Nicholas J.; Simeone, Caelan E.
Taylor, N.J., and Simeone, C.E., 2021, Practical field survey operations for flood insurance rate maps: U.S. Geological Survey Open-File Report 2020–1146, 8 p., https://doi.org/10.3133/ofr20201146.

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Year Published: 2021

An increase in the slope of the concentration-discharge relation for total organic carbon in major rivers in New England, 1973 to 2019

The mobilization and transport of organic carbon (OC) in rivers and delivery to the near-coastal ocean are important processes in the carbon cycle that are affected by both climate and anthropogenic activities. Riverine OC transport can affect carbon sequestration, contaminant transport, ocean acidification, the formation of toxic...

Huntington, Thomas; Wieczorek, Michael

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Year Published: 2021

Review of the invasive Asian clam Corbicula spp. (Bivalvia: Cyrenidae) distribution in North America, 1924–2019

The bivalve Corbicula is one of the most successful aquatic mollusk invaders in the world. Since being intro­duced to North America from its native range in Asia, it has dispersed widely over a large portion of the continent from southern Canada to Panama. The first evidence of its introduc­tion in the Western Hemisphere was discovered in 1924 in...

Benson, Amy J.; Williams, James D.
Benson, A.J., and Williams, J.D., 2021, Review of the invasive Asian clam Corbicula spp. (Bivalvia: Cyrenidae) distribution in North America, 1924–2019: U.S. Geological Survey Scientific Investigations Report 2021–5001, 66 p., https://doi.org/10.3133/sir20215001.

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Year Published: 2021

Re‐purposing groundwater flow models for age assessments: Important characteristics

Groundwater flow model construction is often time‐consuming and costly, with development ideally focused on a specific purpose, such as quantifying well capture from water bodies or providing flow fields for simulating advective transport. As environmental challenges evolve, the incentive to re‐purpose existing groundwater flow models may increase...

Juckem, Paul F.; Starn, J. Jeffrey

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Year Published: 2021

National-scale reservoir thermal energy storage pre-assessment for the United States

The U.S. Geological Survey is performing a pre-assessment of the cooling potential for reservoir thermal energy storage (RTES) in five generalized geologic regions (Basin and Range, Coastal Plains, Illinois Basin, Michigan Basin, Pacific Northwest) across the United States. Reservoir models are developed for the metropolitan areas of eight cities...

Pepin, Jeff D.; Burns, Erick; Dickinson, Jesse E.; Duncan, Leslie L.; Kuniansky, Eve L.; Reeves, Howard W.

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Year Published: 2021

Tropicalization of temperate ecosystems in North America: The northward range expansion of tropical organisms in response to warming winter temperatures

Tropicalization is a term used to describe the transformation of temperate ecosystems by poleward‐moving tropical organisms in response to warming temperatures. In North America, decreases in the frequency and intensity of extreme winter cold events are expected to allow the poleward range expansion of many cold‐sensitive tropical organisms,...

Osland, Michael; Stevens, Philip; Lamont, Margaret; Brusca, Richard; Hart, Kristen; Waddle, Hardin; Langtimm, Catherine; Williams, Caroline; Keim, Barry; Terando, Adam; Reyier, Eric; Marshall, Katie; Loik, Michael E.; Boucek, Ross; Lewis, Amanda; Seminoff, Jeffrey A.

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Year Published: 2021

Production of haploid gynogens to inform genomic resource development in the paleotetraploid pallid sturgeon (Scaphirhynchus albus)

Order Acipenseriformes (sturgeons and paddlefishes) is an ancient lineage of osteichthyan fishes (>200 million years old) with most extant species at conservation risk. A relatively basal species, the pallid sturgeon, Scaphirhynchus albus, is a federally endangered species native to the Mississippi and Missouri River basins. Hybridization with...

Flamio Jr., Richard; Chojnacki, Kimberly; Delonay, Aaron J.; Dodson, Marlene J; Gocker, Rachel M.; Jenkins, Jill; Powell, Jeffrey; Heist, Edward J.

Filter Total Items: 216
August 27, 2016

Live Chat with James Fountain on Louisiana Floods

This was a Facebook Live video conducted with James Fountain of the USGS discussing the Louisiana flooding in August 2016 and the personal experience James had with this event. Questions and comments during the live video at: https://www.facebook.com/USGeologicalSurvey/videos/1144228595623122/

Two men mark a high-water mark on a structure
August 26, 2016

USGS Scientists Mark a High-Water Mark in Louisiana

Daniel McCay and Chris Henry, USGS hydrologic technicians, use a level to draw a line on a high-water mark August 26. In most circumstances, when a high-water mark is flagged it would then be surveyed with GPS equipment to obtain its exact coordinates and elevation. However, because of the possibility of more storms hitting Louisiana the teams were initially only

Two men walk by debris along the side of the road
August 26, 2016

Looking for High-Water Marks

Daniel McCay and Chris Henry, U.S. Geological Survey hydrologic technicians, search a neighborhood south of Denham Springs, Louisiana, for high-water marks August 26. The term high-water mark refers to the debris flood waters will leave on walls, buildings and trees. This thin line of residue is an indicator of how high the waters reached, yet the fragile nature of

A man in an orange shirt writes on a pad of paper
August 26, 2016

Recording a High-Water Mark

Jonathan Gillip, USGS hydrologist, documents a high-water mark he flagged near a damage retirement community in Denham Springs, Louisiana, August 26. So far, USGS teams have flagged and surveyed more than 400 high-watermarks across southern Louisiana.

Two men stand next to a building in yellow life jackets
August 26, 2016

Surveying a High-Water Mark

Chris Henry and Daniel McCay, USGS hydrologic technicians, use GPS equipment to survey a high-water mark outside of a flooded elementary school in Denham Springs, Louisiana, August 28. This school was located in one of the hardest hit flood areas and the blue line simulates how high the water was at its peak during this historic flood.

August 15, 2016

Flooding near Louisiana Water Science Center

The view on South Sherwood Forest Blvd near the USGS Louisiana Water Science Center office on August 15, 2016.

Image shows a flooded street with green median
August 13, 2016

Flooded Street in Denham Springs

Backwater flooding across Florida Blvd near the Amite River Bridge in Denham Springs, LA.

Image shows a flooded house with trees in the background
August 13, 2016

Flooded House in Denham Springs

A flooded house near the confluence of the Comite and Amite Rivers near Denham Springs, LA.

Image shows flooded houses and vehicles
August 13, 2016

Flooded Neighborhood in Denham Springs

A flooded neighborhood near the confluence of the Comite and Amite Rivers near Denham Springs, LA. 

Photo of USGS biologist preparing to release a reproductive female pallid sturgeon.
August 5, 2016

USGS Biologist prepares to release a reproductive female sturgeon.

USGS Biologist Sabrina Davenport prepares to release a reproductive female pallid sturgeon.

Photo of USGS Biologist preparing to artificially spawn a female lake sturgeon.
August 5, 2016

Lake sturgeon at the USGS Columbia Environmental Research Center

USGS Biologist prepares to artificially spawn a female lake sturgeon in the laboratory at the Columbia Environmental Research Center.

Filter Total Items: 255
Hydrograph of White River at Augusta, Arkansas, December 24-31, 2015. Left side shows Gage height 31-36 feet. Bottom is days.
December 31, 2015

Heavy rainfall of up to 10 inches in northern and western Arkansas that fell during the Christmas weekend is still causing major flooding in some areas.

December 27, 2015

U.S. Geological Survey field crews are measuring flooding on rivers and streams across southwestern and southern Missouri and northeast into the St. Louis area.

Planned US Topo map production schedule for the next three- year revision cycle
November 19, 2015

With the release of new US Topo maps for Illinois and South Dakota, the USGS has completed the second, three-year cycle of revising and updating electronic US Topo quadrangles. This means that since late 2009, the USGS has published nearly every map in the conterminous U.S., twice.

November 18, 2015

U.S. Geological Survey field crews are measuring flooding on rivers and streams across central and southern Missouri.

November 17, 2015

Fact sheets that detail information about parish water resources and water-use are available online for 34 of the state’s 64 parishes, with more coming soon.

Image: EON Geosciences Airplane
October 17, 2015

U.S. Geological Survey scientists will conduct a high-resolution airborne survey to study the rock layers under a region of northeastern Iowa, starting Monday, October 19, and lasting into November.

collage of scientists conducting science related to each mission are
October 15, 2015

Grass carp egg survival is compromised when they settle on streambeds and are potentially covered by sediments, according to a new study by the U.S. Geological Survey. It has been long assumed that the eggs of Asian carps, including grass carp, must be carried in the water current in order to hatch successfully, but no previous scientific studies have proven that theory.

USGS science for a changing world logo
August 27, 2015

Coastal managers and planners now have access to a new U.S. Geological Survey handbook that, for the first time, comprehensively describes the various models used to study and predict sea-level rise and its potential impacts on coasts.

August 17, 2015

The City of West Branch, Iowa, and the U.S. Geological Survey recently partnered to provide real-time streamflow and flood warning information on the west branch of flood-prone Wapsinonoc Creek.

Graph: Peak ground-motion variability for a magnitude 7.7 earthquake
July 30, 2015

Computer simulations of earthquake shaking, replicating the quakes that occurred in 1811-1812 in the New Madrid seismic zone (NMSZ), indicate that future large earthquakes there would produce major, prolonged ground shaking.