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Staff Profiles

Tamara I Ivahnenko (Former Employee)

Hydrologist

Colorado Water Science Center

Science and Products

Science
Data
Publications

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September 30, 2012

Water budget and potential for underground storage in the Buena Vista-Salida Basin in Chaffee and parts of Fremont, Lake, and Saguache Counties, Colorado, 2009-2012

Population increases in the Upper Arkansas Headwaters Region, which includes Chaffee, Custer, Fremont, and Lake Counties, Colorado, are forecast to increase about 75 percent by 2030. An annual deficit gap between supply and demand of about 5,950 acre-feet is anticipated. Groundwater in the area is tributary to the Arkansas River but the effects of additional groundwater use are poorly defined by...

Colorado Water Science Center

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September 30, 2012

Water budget and potential for underground storage in the Buena Vista-Salida Basin in Chaffee and parts of Fremont, Lake, and Saguache Counties, Colorado, 2009-2012

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September 16, 2024

Data for Modeling Interbasin Transfers of Water in Colorado and the Northeast Region, United States.

Data used to predict flow characteristics of transfers of water between hydrologic basins at the hydrologic unit code 8 (HUC8 scale) using tree-based ensemble models—random forest models for Colorado and M5 cubist models for the Northeast Region (parts of Pennsylvania, New Jersey, and New York)—are presented and documented in this data release. Interbasin transfers (IBTs) of waters are important c

New England Water Science Center

July 2, 2018

Dataset of Estimated Use of Water by Subbasin (HUC8) in the Colorado River Basin, Southwestern United States,1985-2010

The Omnibus Public Land Management Act of 2009 (Public Law 111-11) was passed into law on March 30, 2009. Sub-title F of the law, also known as the SECURE (Science and Engineering to Comprehensively Understand and Responsibly Enhance) Water Act, calls for the establishment of a "national water availability and use assessment program" in the U.S. Geological Survey (USGS). The recommendation for a n

Colorado Water Science Center

November 15, 2017

National USEPA Clean Watershed Needs Survey WWTP nutrient loads 1978 to 2012

This dataset contains tabular data for U.S. Environmental Protection Agencys (EPA) Clean Watersheds Needs Survey (CWNS) wastewater treatment facility information. Literature-based average total nitrogen and total phosphorous concentrations were substituted for wastewater treatment levels reported for each facility because little or no concentration data is reported in the CWNS. Concentrations were

Colorado Water Science Center

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August 31, 2022

Upper Rio Grande Basin water-resource status and trends: Focus area study review and synthesis

The Upper Rio Grande Basin (URGB) is a critical international water resource under pressure from a myriad of climatic, ecological, infrastructural, water-use, and legal constraints. The objective of this study is to provide a comprehensive assessment of the spatial distribution and temporal trends of selected water-budget components (snow processes, evapotranspiration (ET), streamflow processes, a

Authors

Kyle R. Douglas-Mankin, Christine Rumsey, Graham A. Sexstone, Tamara I. Ivahnenko, Natalie Houston, Shaleene Chavarria, Gabriel B. Senay, Linzy K. Foster, Jonathan V. Thomas, Allison K. Flickinger, Amy E. Galanter, C. David Moeser, Toby L. Welborn, Diana E. Pedraza, Patrick M. Lambert, Michael Scott Johnson

Water Resources Mission Area, Colorado Water Science Center, Earth Resources Observation and Science (EROS) Center , Utah Water Science Center, New Mexico Water Science Center, Oklahoma-Texas Water Science Center

September 17, 2021

Estimates of public-supply, domestic, and irrigation water withdrawal, use, and trends in the Upper Rio Grande Basin, 1985 to 2015

The Rio Grande flows approximately 670 miles from its headwaters in the San Juan Mountains of south-central Colorado to Fort Quitman, Texas, draining the Upper Rio Grande Basin (URGB) study area of 32,000 square miles that includes parts of Colorado, New Mexico, and Texas. Parts of the basin extend into the United Mexican States (hereafter “Mexico”), where the Rio Grande forms the international bo

Authors

Tamara I. Ivahnenko, Allison K. Flickinger, Amy E. Galanter, Kyle R. Douglas-Mankin, Diana E. Pedraza, Gabriel B. Senay

Water Resources Mission Area, Colorado Water Science Center, Earth Resources Observation and Science (EROS) Center , New Mexico Water Science Center, Oklahoma-Texas Water Science Center

June 26, 2018

Estimates of water use and trends in the Colorado River Basin, Southwestern United States, 1985–2010

The Colorado River Basin (CRB) drains 246,000 square miles and includes parts of California, Colorado, Nevada, New Mexico, Utah, and Wyoming, and all of Arizona (Basin States). This report contains water-use estimates by category of use for drainage basins (Hydrologic Unit Code 8; HUC‑8) within the CRB from 1985 to 2010, at 5-year intervals. Estimates for public supply, domestic, commercial, indus

Authors

Molly A. Maupin, Tamara I. Ivahnenko, Breton Bruce

Water Resources Mission Area, Colorado Water Science Center, Idaho Water Science Center

June 19, 2018

Estimated use of water in the United States in 2015

Water use in the United States in 2015 was estimated to be about 322 billion gallons per day (Bgal/d), which was 9 percent less than in 2010. The 2015 estimates put total withdrawals at the lowest level since before 1970, following the same overall trend of decreasing total withdrawals observed from 2005 to 2010. Freshwater withdrawals were 281 Bgal/d, or 87 percent of total withdrawals, and salin

Authors

Cheryl A. Dieter, Molly A. Maupin, Rodney R. Caldwell, Melissa A. Harris, Tamara I. Ivahnenko, John K. Lovelace, Nancy L. Barber, Kristin S. Linsey

Water Resources Mission Area, Water Availability and Use Science Program, Maryland-Delaware-D.C. Water Science Center, Water Science School

January 1, 2018

Comparison of U.S. Geological Survey and Bureau of Reclamation water-use reporting in the Colorado River Basin

The use of water in the United States is arguably one of the most important factors determining water availability at any specific place and time. Numerous local, State, and Federal entities develop, compile, and report water-use data, which can lead to confusing or conflicting information. This report was authored jointly by the U.S. Geological Survey (USGS) and Bureau of Reclamation (Reclamation

Authors

Breton Bruce, James Prairie, Molly A. Maupin, Jeremy Dodds, David Eckhardt, Tamara I. Ivahnenko, Paul Matuska, Eric Evenson, Alan Harrison

Water Resources Mission Area

December 7, 2017

Evaluation and use of U.S. Environmental Protection Agency Clean Watersheds Needs Survey data to quantify nutrient loads to surface water, 1978–2012

Changes in municipal and industrial point-source discharges over time have been an important factor affecting nutrient trends in many of the Nation’s streams and rivers. This report documents how three U.S. Environmental Protection Agency (EPA) national datasets—the Permit Compliance System, the Integrated Compliance Information System, and the Clean Watersheds Needs Survey—were evaluated for use

Authors

Tamara I. Ivahnenko

Water Resources Mission Area, Colorado Water Science Center

September 25, 2014

Groundwater and surface-water interaction and potential for underground water storage in the Buena Vista-Salida Basin, Chaffee County, Colorado, 2011

By 2030, the population of the Arkansas Headwaters Region, which includes all of Chaffee and Lake Counties and parts of Custer, Fremont, and Park Counties, Colorado, is forecast to increase about 73 percent. As the region’s population increases, it is anticipated that groundwater will be used to meet much of the increased demand. In September 2009, the U.S. Geological Survey, in cooperation with t

Authors

Kenneth R. Watts, Tamara I. Ivahnenko, Robert W. Stogner, Sr., James F. Bruce

Water Resources Mission Area, Colorado Water Science Center

December 31, 1998