Mission Areas

Water Resources

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Water is one of seven science mission areas of the U.S. Geological Survey (USGS). Water's mission is to collect and disseminate reliable, impartial, and timely information that is needed to understand the Nation's water resources.

Read Science Plan
Filter Total Items: 167
Geologic framework - Idaho National Laboratory
Date Published: September 22, 2017
Status: Active

As basaltic lava cools and hardens, the inclination, declination, and polarity of the Earth’s ambient magnetic field is recorded in the magnetic minerals of the rock. The recorded magnetic values are largely preserved and can be deciphered by paleomagnetic analysis.

Contacts: Mary K V Hodges
Drilling and Coring - Idaho National Laboratory
Date Published: September 22, 2017
Status: Active

We drill and maintain wells around the INL to monitor and sample groundwater, obtain basalt and sediment cores for study and analysis, and study the physical properties of the subsurface (geophysical logging).

This information helps us to improve the scientific understanding of the eastern Snake River Plain and its aquifer. In particular, we are examining the subsidence of the plain and...

Contacts: Brian V Twining
Video loggoing van
Date Published: September 22, 2017
Status: Active

Drillers use the vertical and horizontal views captured by our downhole video camera to examine borehole integrity before placing water well casing, well screens, and submersible pumps. Hydrologists and geologists use the images to verify geophysical data such as: changes in rock type, small-scale geologic structures, rock fractures, and groundwater movement.

Contacts: Brian V Twining
Geophysical logging van
Date Published: September 22, 2017
Status: Active

Our scientists collect geophysical data from wells to understand the character of rocks and fluids below the surface. Geophysical data for a well are recorded, interpreted, and then disseminated as a geophysical log. Engineers and well drillers use geophysical logs to make well construction decisions such as design for well casing, well screen, and pump placement. Hydrologists, geologists and...

Contacts: Brian V Twining
Water Archive Library - Idaho National Laboratory Project Office
Date Published: September 21, 2017
Status: Active

Since 1966, we have archived over 6000 samples of about 500 mL each of "raw" (unfiltered and unpreserved) water from groundwater and surface-water quality sites collected during our monitoring activities. Through the years, we've kept the water samples in a secure room and tracked which samples researchers have requested and analyzed for various projects.

Contact us for more information...

Core Storage Library, USGS Idaho National Laboratory Project Office
Date Published: September 21, 2017
Status: Active

Our Core Storage Library currently houses about 135,000 feet of core and several suites of cuttings from boreholes drilled at the INL. More cores and cuttings are added every year. The CSL also houses two suites of core and cuttings from the western Snake River Plain. In 2015, we added new core storage space in building CF 674.

Contacts: Mary K V Hodges
USGS geologist Mary Hodges
Date Published: September 20, 2017
Status: Completed

Relatively little is known about the Yellowstone-Snake River "hotspot" system. To increase our knowledge, the U.S. Department of Energy’s Geothermal Technologies Program provided over $4.5 million of this $6.7 million project using American Recovery and Reinvestment Act funds.

Contacts: Brian V Twining
September 2002 stormwater flow; view oriented upstream at streamgage 08329870, Bear Arroyo at Jefferson Street site.
Date Published: September 20, 2017

The system of drainage channels and natural stream channels in the Albuquerque metropolitan area is a source of concern because of potential local flooding and water-quality problems. Rapid urbanization since 1970 has increased precipitation runoff to these channels, which in many instances return flow to the Rio Grande. As an important element of the City of Albuquerque’s water-resources...

Core samples from Idaho National Laboratory
Date Published: September 20, 2017
Status: Completed

The U.S. Department of Energy has proposed a location for a new facility to store waste at the INL. In the unlikely event that waste leaks from the facility, it will be important to monitor whether the contamination reaches the aquifer and baseline information is need before the facility is built.

Because we need to know how water and contaminants may travel through the aquifer, we need...

Naval Reactors Facility, Idaho National Laboratory
Date Published: September 20, 2017
Status: Completed

As part of the Comprehensive Environmental Response Compensation and Liability Act, it is important to evaluate the effect of Naval Reactors Facility (NRF) activities on the water quality of the eastern Snake River Plain aquifer.

Contacts: Gordon Rattray
Hailey, Idaho
Date Published: September 19, 2017
Status: Active

Rapid population growth in the Wood River Valley since the 1970s has caused concern about the long-term sustainability of the groundwater resource. Water-resource planners and managers, as well as other decision makers, need a tool for water rights administration and water-resource management and planning.

Plastic Waste
Date Published: September 11, 2017

Microplastics in the environment are of increasing concern among resource managers and ecologists. With global production of plastic topping 300 million metric tons in 2015, research in fresh and marine waters throughout the world has implicated urban runoff, wastewater treatment effluent, and litter breakdown as major sources of microbeads and synthetic pieces and fibers that are slow to...

Contacts: Shawn C Fisher

The USGS collects, analyzes, and distributes data on a wide variety of water-related issues and resources. Much of our data is publicly available through the National Water Information System (NWIS), but additional datasets and analytical tools are also available.

Access NWISWeb
Filter Total Items: 54
USGS
November 21, 2017

USGS Streamstats (Oregon)

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.

USGS
November 2, 2017

Willamette River in Portland Water-Quality Site

Willamette River at Portland, OR, is one of the most extensively monitoring streams in the US. The monitor located at the Morrsion Bridge in downtown Portland measures thirteen real-time parameters.

Arkansas Current Water Conditions Image
October 31, 2017

Current Conditions for Arkansas - Streamflow

To view current streamflow conditions for Arkansas click here

USGS
October 31, 2017

Clackamas River Basin Water-Quality Sites

Recent and historical data for USGS Clackamas River Basin water-quality monitors.

Application screenshot thumbnail
September 1, 2017

National Water Information System (NWIS)

The National Water Information System (NWIS) web application provides access to surface-water, groundwater, water-quality, and water-use data collected at approximately 1.5 million sites across all 50 states.

NWIS-Mapper thumbnail image
August 30, 2017

National Water Information System (NWIS) Mapper

The National Water Information System (NWIS) Mapper provides access to water-resources data at over 1.5 million sites across the U.S., including current and historical data. Users can search by site type, data type, site number, or place.

 Logo-Water Census Data Portal
August 29, 2017

National Water Census Data Portal

The National Water Census Data Portal contains national estimates of water budget components for local watersheds, water withdrawal data for counties, tools to calculate statistics of daily streamflow records, modeled daily streamflow at ungaged stations, and access to records of aquatic biology observations.

A StreamStats map image of the eastern United States
August 9, 2017

StreamStats for Virginia and the Nation

Interactively identify a watershed boundary and obtain detailed streamflow statistics.

For an introduction to StreamStats click HERE. For Virginia-specific StreamStats information click HERE.

To use StreamStats Beta Version 4 click HERE. To use the older Virginia StreamStates Version 3 click HERE.

 

Example NWIS Graph of real-time groundwater-level monitoring
June 21, 2017

North Dakota Ground Water Data

Data from wells, springs, test holes, tunnels, drains, and excavations in North Dakota; well location data includes information such as latitude and longitude, well depth, and aquifer. Groundwater level data are collected and stored as either discrete field-water-level measurements or as continuous time-series data from automated recorders.

USGS Water-Quality equipment with cover opened at edge of river near a footbridge.
June 3, 2017

Water-Quality Monitor Network in Michigan

The USGS operates a network of real-time water-quality monitoring stations that measure up to five physical parameters. The parameters are temperature, specific conductance, pH, dissolved oxygen, and turbidity. One to four of those parameters are measured at 26 sites, while all five parameters are measured at 13 sites. 

Water use data for the South Atlantic Water Science Center (NWISWeb)
May 22, 2017

Water use data for the South Atlantic Water Science Center (NWISWeb)

Water-use data are collected by area type (state, county, watershed, or aquifer) and source (rivers or groundwater), and category (such as public supply or irrigation). Water-use data has been reported every five years since 1950. The USGS works with local, State, and Federal agencies as well as other organizations to collect and report withdrawals.

Georgia || North Carolina || South Carolina

Bibiocephala dorsal vent
February 2, 2017

North American Aquatic Macroinvertebrate Digital Reference Collection (NAAMDRC)

Aquatic invertebrates are a key component of freshwater ecosystems, and an understanding of aquatic invertebrate taxonomy is central to freshwater science. The North American Aquatic Macroinvertebrate Digital Reference Collection (NAAMDRC) was created by the USGS Aquatic Experimental Lab (AXL) to provide users with high-quality digital microscopy photographs.

Downloadable spatial data files for exploration and analysis.

Filter Total Items: 26
Total withdrawals in million gallons per day by watershed
January 1, 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. 

NAWQA-map
September 19, 1996

The goals of the NAWQA program are being achieved through ongoing or planned investigations of 59 of the Nation's most important river and aquifer systems, which are referred to as study units. These study units were selected to represent the diverse geography, water resources, and land and water uses of the Nation. The Mobile River Basin is one such study unit, designed to supplement water.

Filter Total Items: 1,556
Year Published: 2017

Conceptual model for invasive bivalve control on wetland productivity

Tidal wetlands were the historically dominant features of many coastal regions around the world, including the San Francisco Estuary (Callaway et al. 2011; Whipple et al. 2012). These mosaics of varied interconnected habitats (Mitsch and Gosselink 1993) provide a host of ecosystem services, including biodiversity maintenance, fish and wildlife...

Hartman, Rosemary; Brown, Larry R.; Thompson, Janet K.; Parchaso, Francis
Attribution: Water Resources
Hartman R, L Brown, J Thompson, F Parchaso. 2017 Conceptual Model for Invasive Bivalve Control on Wetland Productivity. In Effects of Tidal Wetland Restoration on Fish: A Suite of Conceptual Models. Sherman, S., R. Hartman, and D. Contreras, editors, IEP Technical Report 91. Department of Water Resources, Sacramento, California, p 225-257 http://www.water.ca.gov/iep/products/technicalrpts.cfm

Year Published: 2017

Monitoring gas and heat emissions at Norris Geyser Basin, Yellowstone National Park, USA based on a combined eddy covariance and Multi-GAS approach

We quantified gas and heat emissions in an acid-sulfate, vapor-dominated area (0.04-km2) of Norris Geyser Basin, located just north of the 0.63 Ma Yellowstone Caldera and near an area of anomalous uplift. From 14 May to 3 October 2016, an eddy covariance system measured half-hourly CO2, H2O and sensible (H) and latent (LE) heat fluxes and a...

Lewicki, Jennifer L.; Kelly, Peter; Bergfeld, Deborah; Vaughan, R. Greg; Lowenstern, Jacob B.
Attribution: Water Resources
Lewicki, J.L., P.J. Kelly, D. Bergfeld, R.G. Vaughan, J.B. Lowenstern. Monitoring gas and heat emissions at Norris Geyser Basin, Yellowstone National Park, USA based on a combined eddy covariance and Multi-GAS approach. Journal of Volcanology and Geothermal Research, 347, 312-326, https://doi.org/10.1016/j.jvolgeores.2017.10.001, 2017.

Year Published: 2017

Biological relevance of streamflow metrics: Regional and national perspectives

Protecting the health of streams and rivers requires identifying ecologically significant attributes of the natural flow regime. Streamflow regimes are routinely quantified using a plethora of hydrologic metrics (HMs), most of which have unknown relevance to biological communities. At regional and national scales, we evaluated which of 509...

Carlisle, Daren M.; Grantham, Theodore E.; Eng, Kenny; Wolock, David M.
Attribution: Water Resources

Year Published: 2017

Disrupted carbon cycling in restored and unrestored urban streams: Critical timescales and controls

Carbon fixation and respiration in flowing waterways play significant roles in global and regional carbon budgets, yet how land use and watershed management interact with temporal disturbances (storms) to influence metabolism remains poorly understood. Here, we combine long-term with synoptic sampling of metabolism and its variable controls in...

Larsen, L. G.; Harvey, Judson
Attribution: Water Resources

Year Published: 2017

Perspectives on chemical oceanography in the 21st century: Participants of the COME ABOARD Meeting examine aspects of the field in the context of 40 years of DISCO

The questions that chemical oceanographers prioritize over the coming decades, and the methods we use to address these questions, will define our field's contribution to 21st century science. In recognition of this, the U.S. National Science Foundation and National Oceanic and Atmospheric Administration galvanized a community effort (the Chemical...

Fassbender, Andrea J.; Palevsky, Hilary I.; Martz, Todd R.; Ingalls, Anitra E.; Gledhill, Martha; Fawcett, Sarah E.; Brandes, Jay; Aluwihare, Lihini; Anderson, Robert M.; Bender, Sara; Boyle, Ed; Bronk, Debbie; Buesseler, Ken; Burdige, David J.; Casciotti, Karen; Close, Hilary; Conte, Maureen; Cutter, Greg; Estapa, Meg; Fennel, Katja; Ferron, Sara; Glazer, Brian; Goni, Miguel; Grand, Max; Guay, Chris; Hatta, Mariko; Hayes, Chris; Horner, Tristan; Ingall, Ellery; Johnson, Kenneth G.; Juranek, Laurie; Knapp, Angela; Lam, Phoebe; Luther, George; Matrai, Paty; Nicholson, David; Paytan, Adina; Pellenbarg, Robert; Popendorf, Kim; Reddy, Christopher M.; Ruttenberg, Kathleen; Sabine, Chris; Sansone, Frank; Shaltout, Nayrah; Sikes, Liz; Sundquist, Eric T.; Valentine, David; Wang, Zhao (Aleck); Wilson, Sam; Barrett, Pamela; Behrens, Melanie; Belcher, Anna; Biermann, Lauren; Boiteau, Rene; Clarke, Jennifer; Collins, Jamie; Coppola, Alysha; Ebling, Alina M.; Garcia-Tigreros, Fenix; Goldman, Johanna; Guallart, Elisa F.; Haskell, William; Hurley, Sarah; Janssen, David; Johnson, Winn; Lennhartz, Sinikka; Liu, Shuting; Rahman, Shaily; Ray, Daisy; Sarkar, Amit; Steiner, Zvika; Widner, Brittany; Yang, Bo
Attribution: Water Resources
Fassbender, A.J. et al, 2017, Perspectives on Chemical Oceanography in the 21st century: Participants of the COME ABOARD Meeting examine aspects of the field in the context of 40 years of DISCO, Marine Chemistry, 196, 181-190, https://doi.org/10.1016/j.marchem.2017.09.002.

Year Published: 2017

Predicting outcomes of restored Everglades high flow: A model system for scientifically managed floodplains

Restoration of higher flows through the Everglades is intended to reestablish sheetflow to rebuild a well-functioning ridge and slough landscape that supports a productive and diverse ecosystem. Our objective of the study was to use hydrologic simulations and biophysical analysis to predict restoration outcomes for five major subbasins of the...

Choi, Jay; Harvey, Judson
Attribution: Water Resources
J. Choi and J.W. Harvey, 2016, Predicting outcomes of restored Everglades high flow: a model system for scientifically managed floodplains, Restoration Ecology, doi:10.1111/rec.12479.

Year Published: 2017

Flow and residence times of dynamic river bank storage and sinuosity-driven hyporheic exchange

Hydrologic exchange fluxes (HEFs) vary significantly along river corridors due to spatiotemporal changes in discharge and geomorphology. This variability results in the emergence of biogeochemical hot-spots and hot-moments that ultimately control solute and energy transport and ecosystem services from the local to the watershed scales. In this...

Gomez-Velez, J.D.; Wilson, J.L.; Cardenas, M.B.; Harvey, Judson
Attribution: Water Resources

Year Published: 2017

Near-field receiving water monitoring of trace metals and a benthic community near the Palo Alto Regional Water Quality Control Plant in south San Francisco Bay, California; 2016

Trace-metal concentrations in sediment and in the clam Macoma petalum (formerly reported as Macoma balthica), clam reproductive activity, and benthic macroinvertebrate community structure were investigated in a mudflat 1 kilometer south of the discharge of the Palo Alto Regional Water Quality Control Plant (PARWQCP) in south San Francisco Bay,...

Cain, Daniel J.; Thompson, Janet K.; Parchaso, Francis; Pearson, Sarah; Stewart, Robin; Turner, Mathew; Barasch, David; Luoma, Samuel N.
Attribution: Water Resources
Cain, D.J., Thompson, J.K., Parchaso, F., Pearson, S., Stewart, R., Turner, M., Barasch, D., and Luoma, S.N., 2017, Near-field receiving water monitoring of trace metals and a benthic community near the Palo Alto Regional Water Quality Control Plant in south San Francisco Bay, California; 2016: U.S. Geological Survey Open-File Report 2017–1135, 75 p., https://doi.org/10.3133/ofr20171135.

Year Published: 2017

New biotite and muscovite isotopic reference materials, USGS57 and USGS58, for δ2H measurements–A replacement for NBS 30

The advent of continuous-flow isotope-ratio mass spectrometry (CF-IRMS) coupled with a high temperature conversion (HTC) system enabled faster, more cost effective, and more precise δ2H analysis of hydrogen-bearing solids. Accurate hydrogen isotopic analysis by on-line or off-line techniques requires appropriate isotopic reference materials (...

Qi, Haiping; Coplen, Tyler B.; Gehre, Matthias; Vennemann, Torsten W.; Brand, Willi A.; Geilmann, Heike; Olack, Gerard; Bindeman, Ilya N.; Palandri, Jim; Huang, Li; Longstaffe, Fred J.
Attribution: Water Resources
Qi et al, 2017 New biotite and muscovite isotopic reference materials, USGS57 and USGS58, for δ2H measurements–a replacement for NBS 30, Chemical Geology, 467, 89-99.

Year Published: 2017

Seasonality of stable isotope composition of atmospheric water input at the southern slopes of Mt. Kilimanjaro, Tanzania

To understand the moisture regime at the southern slopes of Mt. Kilimanjaro, we analysed the isotopic variability of oxygen (δ18O) and hydrogen (δD) of rainfall, throughfall, and fog from a total of 2,140 samples collected weekly over 2 years at 9 study sites along an elevation transect ranging from 950 to 3,880 m above sea level....

Otte, Insa; Detsch, Florian; Gutlein, Adrian; Scholl, Martha A.; Kiese, Ralf; Appelhans, Tim; Nauss, Thomas
Attribution: Water Resources
Otte, I., Detsch, F., Gutlein, A., Scholl, M., Kiese, R., Appelhans, T. and Nauss, T., 2017, Seasonality of stable isotope composition of atmospheric water input at the southern slopes of Mt. Kilimanjaro, Tanzania, Hydrological Processes, 31, 3931-3947, doi: 10.1002/hyp.11311.

Year Published: 2017

Assessment of the potential respiratory hazard of volcanic ash from future Icelandic eruptions: A study of archived basaltic to rhyolitic ash samples

BackgroundThe eruptions of Eyjafjallajökull (2010) and Grímsvötn (2011), Iceland, triggered immediate, international consideration of the respiratory health hazard of inhaling volcanic ash, and prompted the need to estimate the potential hazard posed by future eruptions of Iceland’s volcanoes to Icelandic and Northern European populations. ...

Damby, David; Horwell, Claire J.; Larsen, Gudrun; Thordarson, Thorvaldur; Tomatis, Maura; Fubini, Bice; Donaldson, Ken
Attribution: Water Resources

Year Published: 2017

The effect of aluminium and sodium impurities on the in vitro toxicity and pro-inflammatory potential of cristobalite

BackgroundExposure to crystalline silica (SiO2), in the form of quartz, tridymite or cristobalite, can cause respiratory diseases, such as silicosis. However, the observed toxicity and pathogenicity of crystalline silica is highly variable. This has been attributed to a number of inherent and external factors, including the presence of impurities...

Nattrass, C.; Horwell, Claire J.; Damby, David; Brown, David; Stone, Vicki
Attribution: Water Resources

The USGS produces many types of multimedia products. Use the links below to browse our offerings of photograph galleries, podcasts and sound files, videos, aerial photos, and posters related to water. The USGS Newsroom has a Web page that highlights the main collection of multimedia products.

Filter Total Items: 886
Salt Wash in the San Rafael Swell with white surface salts
2017 (approx.)
Muddy Creek in the San Rafael Swell with white surface salts. Salinity loads that originate from groundwater within the Upper Colorado River Basin have decreased from 1986-2011, according to a new U.S. Geological Survey study done in cooperation with the Colorado River Basin Salinity Control Program.
man in yellow slicker standing in rushing river up to his thighs, holding a stick-like instrument in the water
2017 (approx.)
USGS hydrographer measuring streamflow using a handheld Acoustic Doppler Velocimeter in fast moving floodwater Cajon Creek near Keenbrook, California.
Woman standing in middle of stream next to instruments
2017 (approx.)
USGS technician measuring streamflow in northern Nevada.
2017 (approx.)
Groundwater use from the Ozark Plateaus aquifer system, 1900 to 2010” is a short video showing modeled groundwater withdrawal rates from the Ozark Plateaus aquifer system (Ozark system) in the central United States. The Ozark Plateaus Groundwater Availability Study aims to quantify current groundwater resources in the Ozark system, evaluate how these resources have changed over time, and provide...
Unmanned Aerial System prior to takeoff
2017 (approx.)
This small unmanned aerial system with digital camera has been used to create digital elevation models to answer questions about erosion, bridge scour, and other hydraulics analyses.
scientific instruments and platform next to river surrounded by snow
2017 (approx.)
USGS Streamgaging equipment and cableway on the Pit River near Canby, California operates year round.
Filter Total Items: 357
White Bear Lake thumbnail
September 6, 2017

Both precipitation and groundwater withdrawals, among other factors, influence lake-water levels in the northeast Twin Cities metropolitan area, and the extent of these changes vary among lakes, according to a new U.S. Geological Survey study.

Storm-tide sensor installed to a concrete post in Puerto Rico prio to Hurricane Irma.
September 5, 2017

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Irma, visit the USGS Hurricane Irma page.

A USGS crew measures flood waters off a bridge.
August 30, 2017

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Harvey, visit the USGS Hurricane Harvey page.

A photo of floodwaters reaching up to a street sign in Texas
August 30, 2017

The U.S. Geological Survey has deployed storm-tide sensors, forecast what coastal change to expect, and is ready to measure the extent of flooding likely to result from this powerful storm, Hurricane Harvey. Click HERE for more information.

A USGS crew prepares to measure Hurricane Harvey floodwaters off of a bridge.
August 29, 2017

Reporters: Do you want to interview USGS scientists as they measure flooding? Please contact Jennifer LaVista or Lynne Fahlquist. 

U.S. Geological Survey field crews are measuring record flooding in parts of south-central Texas following intense rainfall from Tropical Storm Harvey.

A USGS crew prepares to measure Hurricane Harvey floodwaters off of a bridge.
August 29, 2017

Reporters: Do you want to interview USGS scientists as they measure flooding? Please contact Jennifer LaVista or Lynne Fahlquist. 

U.S. Geological Survey field crews are measuring record flooding in parts of south-central Texas following intense rainfall from Tropical Storm Harvey.

Satellite captured image of the rapidly intensifying storm, Harvey
August 25, 2017

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Harvey, visit the USGS Hurricane Harvey page.

Satellite captured image of the rapidly intensifying storm, Harvey
August 25, 2017

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Harvey, visit the USGS Hurricane Harvey page.

Satellite image of Hurricane Harvey
August 24, 2017

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Harvey, visit the USGS Hurricane Harvey page.

Storm-tide sensors are being installed at key locations along the Texas Gulf Coast by the U.S. Geological Survey in advance of Hurricane Harvey.

Agricultural Stream in Indiana in foreground with barn and silos in background
August 9, 2017

One hundred small streams in the Midwest were tested for pesticides during the 2013 growing season and found to contain, on average, 52 pesticides per stream

This image demonstrates how the USGS Search API can be used to show the suggested locations appearing in the menu on the map
July 26, 2017

The U.S. Geological Survey Search API is a custom JavaScript library useful for creating a location search widget in a webpage, typically in conjunction with a web map. The widget connects to a database created for the API, or Application-Programming Interface, to quickly find and suggest locations as the user enters text to navigate to areas of interest. 

USGS scientist collects a groundwater-level measurement in Freeport, Texas. 
July 19, 2017

A new interactive web application illustrates how groundwater, sediment compaction and land-elevation change are related in the Houston-Galveston region in Texas. The new app was developed by the U.S. Geological Survey and is available online.