A water budget is an accounting of hydrologic components of the water cycle, transfers between the components, and their relative contributions within a water system. Water budgets help define how much water is available, how much water is used, where the water comes from, and at what rate water is replenished or consumed. In its simplest form, a water budget defines the amount of water entering and leaving a water system. The USGS Oklahoma-Texas Water Science Center (OTWSC) provides data and information about water-budget components that are needed to manage water resources in Texas. Visit the links below for more information on our data and science.
Basic components of water budgets are precipitation, evapotranspiration, surface-water and groundwater flow into and out of the watershed or aquifer, change in surface-water and groundwater storage, and human withdrawals and interbasin transfers.
WATER BUDGET SCIENCE CAPABILITIES
OTWSC has expertise in water budget science applications, including, but not limited to:
- Modeling analysis to estimate water-budget components under different climate and water-use scenarios
- Quanitifying potential changes in hydrologic budgets due to vegetative land-cover changes at a watershed scale.
- Estimating groundwater recharge using statistical regression techniques
- Monitoring evapotranspiration rates to evaluate how changes in land cover and soil moisture content may change water budgets
- Determining groundwater sources, recharge, discharge, and mixing zones
- Collecting streamflow data.
CURRENT WATER BUDGET SCIENCE
Coastal Lowlands Regional Groundwater Availability Study (CLAS)
Evapotranspiration Monitoring at Huisache Removal Site
Hydrogeologic Atlas for Fort Bliss
Hydrogeologic Framework of Gaines, Terry, and Yoakum Counties
Hydrologic Monitoring of Medina and Diversion Lakes, San Antonio Area
Projects related to water budgets are listed below.
Upper Rio Grande Basin Focus Area Study
Red River Focus Area Study
Hydrologic Monitoring of Medina and Diversion Lakes, San Antonio Area
Hydrogeologic Framework and Geochemistry of Gaines, Terry, and Yoakum Counties
Hydrogeologic Atlas for Fort Bliss
Effects of Huisache Removal on Evapotranspiration
Coastal Lowlands Regional Groundwater Availability Study
Data and tools related to water budgets are listed below.
U.S. Water Use from 1950-2015
How much water do we use?
In the map below, State size (area) is scaled proportionally to State freshwater use.
Publications related to water budgets are listed below.
A water-budget analysis of Medina and Diversion Lakes and the Medina/Diversion Lake system, with estimated recharge to Edwards aquifer, San Antonio area, Texas
A preliminary assessment of streamflow gains and losses for selected stream reaches in the lower Guadalupe River Basin, Texas, 2010-12
Geodatabase compilation of hydrogeologic, remote sensing, and water-budget-component data for the High Plains aquifer, 2011
Estimation of evaporation from open water - A review of selected studies, summary of U.S. Army Corps of Engineers data collection and methods, and evaluation of two methods for estimation of evaporation from five reservoirs in Texas
Effects of brush management on the hydrologic budget and water quality in and adjacent to Honey Creek State Natural Area, Comal County, Texas, 2001--10
Hydrogeology and simulation of groundwater flow and land-surface subsidence in the northern part of the Gulf Coast aquifer system, Texas, 1891-2009
Hydrologic and water-quality data at Government Canyon State Natural Area, Bexar County, Texas, 2002-10
Hydrogeologic settings and groundwater-flow simulations for regional investigations of the transport of anthropogenic and natural contaminants to public-supply wells—Investigations begun in 2004
Simulations of groundwater flow and particle-tracking analysis in the zone of contribution to a public-supply well in San Antonio, Texas
Rainfall and evapotranspiration data for southwest Medina County, Texas, August 2006-December 2009
Effects of brush management on the hydrologic budget and water quality in and adjacent to Honey Creek State Natural Area, Comal County, Texas, 2001-10
Simulation of Streamflow, Evapotranspiration, and Groundwater Recharge in the Lower San Antonio River Watershed, South-Central Texas, 2000-2007
- Overview
A water budget is an accounting of hydrologic components of the water cycle, transfers between the components, and their relative contributions within a water system. Water budgets help define how much water is available, how much water is used, where the water comes from, and at what rate water is replenished or consumed. In its simplest form, a water budget defines the amount of water entering and leaving a water system. The USGS Oklahoma-Texas Water Science Center (OTWSC) provides data and information about water-budget components that are needed to manage water resources in Texas. Visit the links below for more information on our data and science.
Basic components of water budgets are precipitation, evapotranspiration, surface-water and groundwater flow into and out of the watershed or aquifer, change in surface-water and groundwater storage, and human withdrawals and interbasin transfers.
WATER BUDGET SCIENCE CAPABILITIES
OTWSC has expertise in water budget science applications, including, but not limited to:
- Modeling analysis to estimate water-budget components under different climate and water-use scenarios
- Quanitifying potential changes in hydrologic budgets due to vegetative land-cover changes at a watershed scale.
- Estimating groundwater recharge using statistical regression techniques
- Monitoring evapotranspiration rates to evaluate how changes in land cover and soil moisture content may change water budgets
- Determining groundwater sources, recharge, discharge, and mixing zones
- Collecting streamflow data.
Servicing the evapotranspiration station at the huisache removal site, Texas. (Public domain.) CURRENT WATER BUDGET SCIENCE
Coastal Lowlands Regional Groundwater Availability Study (CLAS)
Evapotranspiration Monitoring at Huisache Removal Site
Hydrogeologic Atlas for Fort Bliss
Hydrogeologic Framework of Gaines, Terry, and Yoakum Counties
Hydrologic Monitoring of Medina and Diversion Lakes, San Antonio Area
- Science
Projects related to water budgets are listed below.
Upper Rio Grande Basin Focus Area Study
USGS is undertaking a 3-year study of water use, availability, and change in the Upper Rio Grande Basin in one of several national “Focus Area Studies” in the Department of Interior’s WaterSMART initiative. The Upper Rio Grande study area runs 670 miles from its headwaters in Colorado through New Mexico and northern Mexico to Ft. Quitman, Texas. Along its river corridor, it is a primary source of...Red River Focus Area Study
The USGS is undertaking a 3-year study of water use, availability, and change in the Red River basin in one of several national “Focus Area Studies” in the Department of Interior’s WaterSMART initiative . The Red River basin covers more than 93,000 square miles in New Mexico, Texas, Oklahoma, Arkansas, and Louisiana with a population of about 4.3 million people. Water resources in the basin are...Hydrologic Monitoring of Medina and Diversion Lakes, San Antonio Area
In 2016, the U.S. Geological Survey (USGS), in cooperation with the San Antonio Water System, began a study to refine previously derived estimates of groundwater outflows from Medina and Diversion Lakes in south-central Texas near San Antonio.Hydrogeologic Framework and Geochemistry of Gaines, Terry, and Yoakum Counties
In 2014, USGS, in cooperation with Llano Estacado Underground Water Conservation District, Sandy Land Underground Water District, and South Plains Underground Water Conservation District, began a multiphase project to develop a regional conceptual model of the hydrogeologic framework and geochemistry of the Ogallala, Edwards-Trinity, and Dockum aquifers. The Ogallala aquifer is the shallowest...Hydrogeologic Atlas for Fort Bliss
Successful long term stewardship of Fort Bliss lands includes managing traditional hydrologic resources such as surface water and groundwater resources and increasingly, geologic resources such as geothermal reservoirs and deep well injection locations. The USGS Texas Water Science Center is developing a garrison-wide hydrogeologic atlas that describes the hydrology and hydrogeology of Fort Bliss...Effects of Huisache Removal on Evapotranspiration
USGS Texas Water Science Center scientists are evaluating potential changes in the hydrologic budget, specifically evapotranspiration, as a result of brush management (applied to huisache) as a conservation practice.Coastal Lowlands Regional Groundwater Availability Study
USGS is undertaking a 5-year study to assess groundwater availability for the aquifers proximal to the Gulf of Mexico from the Texas-Mexico border through the panhandle of Florida, known as the Coastal Lowlands Aquifer System (CLAS). This study is one of several within the Regional Groundwater Availability Studies of the USGS Water Availability and Use Science Program. - Data
Data and tools related to water budgets are listed below.
U.S. Water Use from 1950-2015
How much water do we use?
In the map below, State size (area) is scaled proportionally to State freshwater use. - Publications
Publications related to water budgets are listed below.
Filter Total Items: 24A water-budget analysis of Medina and Diversion Lakes and the Medina/Diversion Lake system, with estimated recharge to Edwards aquifer, San Antonio area, Texas
In January 2001, the U.S. Geological Survey—in cooperation with the Edwards Aquifer Authority—began a study to refine and, if possible, extend previously derived (1995–96) relations between the stage in Medina Lake and recharge to the Edwards aquifer to include the effects of reservoir stages below 1,018 feet and greater than 1,046 feet above National Geodetic Vertical Datum of 1929. The principalAuthorsRichard N. Slattery, Lisa D. MillerA preliminary assessment of streamflow gains and losses for selected stream reaches in the lower Guadalupe River Basin, Texas, 2010-12
The U.S. Geological Survey, in cooperation with the U.S. Army Corps of Engineers–Fort Worth District, the Texas Water Development Board, the Guadalupe-Blanco River Authority, and the Edwards Aquifer Authority, investigated streamflow gains and losses in the lower Guadalupe River Basin during four selected base-flow periods in March 2010, April 2011, August 2011, and, for a stream reach between SegAuthorsLoren L. Wehmeyer, Karl E. Winters, Darwin J. OckermanGeodatabase compilation of hydrogeologic, remote sensing, and water-budget-component data for the High Plains aquifer, 2011
The High Plains aquifer underlies almost 112 million acres in the central United States. It is one of the largest aquifers in the Nation in terms of annual groundwater withdrawals and provides drinking water for 2.3 million people. The High Plains aquifer has gained national and international attention as a highly stressed groundwater supply primarily because it has been appreciably depleted in soAuthorsNatalie A. Houston, Sophia L. Gonzales-Bradford, Amanda T. Flynn, Sharon L. Qi, Steven M. Peterson, Jennifer S. Stanton, Derek W. Ryter, Terry L. Sohl, Gabriel B. SenayEstimation of evaporation from open water - A review of selected studies, summary of U.S. Army Corps of Engineers data collection and methods, and evaluation of two methods for estimation of evaporation from five reservoirs in Texas
Organizations responsible for the management of water resources, such as the U.S. Army Corps of Engineers (USACE), are tasked with estimation of evaporation for water-budgeting and planning purposes. The USACE has historically used Class A pan evaporation data (pan data) to estimate evaporation from reservoirs but many USACE Districts have been experimenting with other techniques for an alternativAuthorsGlenn R. HarwellEffects of brush management on the hydrologic budget and water quality in and adjacent to Honey Creek State Natural Area, Comal County, Texas, 2001--10
Woody vegetation, including ashe juniper (Juniperus ashei), has encroached on some areas in central Texas that were historically oak grassland savannah. Encroachment of woody vegetation is generally attributed to overgrazing and fire suppression. Removing the ashe juniper and allowing native grasses to reestablish in the area as a brush management conservation practice (hereinafter referred to asAuthorsJ. Ryan Banta, Richard N. SlatteryHydrogeology and simulation of groundwater flow and land-surface subsidence in the northern part of the Gulf Coast aquifer system, Texas, 1891-2009
In cooperation with the Harris–Galveston Subsidence District, Fort Bend Subsidence District, and Lone Star Groundwater Conservation District, the U.S. Geological Survey developed and calibrated the Houston Area Groundwater Model (HAGM), which simulates groundwater flow and land-surface subsidence in the northern part of the Gulf Coast aquifer system in Texas from predevelopment (before 1891) throuAuthorsMark C. KasmarekHydrologic and water-quality data at Government Canyon State Natural Area, Bexar County, Texas, 2002-10
The U.S. Geological Survey, in cooperation with the U.S. Department of Agriculture Natural Resources Conservation Service, the Edwards Aquifer Authority, and the Texas Parks and Wildlife Department, collected rainfall, streamflow, evapotranspiration, and stormflow water-quality data at the Laurel Canyon Creek watershed, within the Government Canyon State Natural Area, Bexar County, Tex. The purposAuthorsJ. Ryan Banta, Richard N. SlatteryHydrogeologic settings and groundwater-flow simulations for regional investigations of the transport of anthropogenic and natural contaminants to public-supply wells—Investigations begun in 2004
A study of the Transport of Anthropogenic and Natural Contaminants to public-supply wells (TANC study) was begun in 2001 as part of the U.S. Geological Survey National Water-Quality Assessment (NAWQA) Program. The study was designed to shed light on factors that affect the vulnerability of groundwater and, more specifically, water from public-supply wells to contamination to provide a context forAuthorsSandra M. EbertsSimulations of groundwater flow and particle-tracking analysis in the zone of contribution to a public-supply well in San Antonio, Texas
In 2006, a public-supply well in San Antonio, Texas, was selected for intensive study to assess the vulnerability of public-supply wells in the Edwards aquifer to contamination by a variety of compounds. A local-scale, steady-state, three-dimensional numerical groundwater-flow model was developed and used in this study to evaluate the movement of water and solutes from recharge areas to the selectAuthorsRichard L. Lindgren, Natalie A. Houston, MaryLynn Musgrove, Lynne S. Fahlquist, Leon J. KauffmanRainfall and evapotranspiration data for southwest Medina County, Texas, August 2006-December 2009
During August 2006-December 2009, the U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers, Fort Worth District, collected rainfall and evapotranspiration data to help characterize the hydrology of the Nueces River Basin, Texas. The USGS installed and operated a station to collect continuous (30-minute interval) rainfall and evapotranspiration data in southwest MedinAuthorsRichard N. Slattery, William H. Asquith, Darwin J. OckermanEffects of brush management on the hydrologic budget and water quality in and adjacent to Honey Creek State Natural Area, Comal County, Texas, 2001-10
The U.S. Geological Survey, in cooperation with the U.S. Department of Agriculture Natural Resources Conservation Service, the Edwards Region Grazing Lands Conservation Initiative, the Texas State Soil and Water Conservation Board, the San Antonio River Authority, the Edwards Aquifer Authority, Texas Parks and Wildlife, the Guadalupe Blanco River Authority, and the San Antonio Water System, evaluaAuthorsJ. Ryan Banta, Richard N. SlatterySimulation of Streamflow, Evapotranspiration, and Groundwater Recharge in the Lower San Antonio River Watershed, South-Central Texas, 2000-2007
The U.S. Geological Survey (USGS), in cooperation with the San Antonio River Authority, the Evergreen Underground Water Conservation District, and the Goliad County Groundwater Conservation District, configured, calibrated, and tested a watershed model for a study area consisting of about 2,150 square miles of the lower San Antonio River watershed in Bexar, Guadalupe, Wilson, Karnes, DeWitt, GoliaAuthorsJoy S. Lizarraga, Darwin J. Ockerman