The Bureau of Reclamation (Reclamation) has collaborated with the Desert Research Institute and the University of Idaho in the development of a state-of-the-science computerized evapotranspiration (ET) model (ET Demands) that is being used to estimate historical and future agricultural irrigation water demands for the Western United States. Reclamation published an Irrigation Demand and Reservoir Evaporation Projections report as a Baseline Water Assessment activity under the WaterSMART Basin Study Program in 2015. The technical memorandum report provides an analysis of future changes in irrigation water demand across Reclamation’s major river basins (Colorado, Columbia, Klamath, Missouri, Rio Grande, Sacramento/San Joaquin and Truckee/Carson). The technical assessment report provides an analysis of future changes in irrigation water demand across Reclamation’s major river basins (Colorado, Columbia, Klamath, Missouri, Rio Grande, Sacramento/San Joaquin and Truckee/Carson).
The irrigation water demands analysis incorporates five scenarios for three future periods based on global climate models and current cropping patterns. The scenarios are warmer-drier (WD), warmer-wetter (WW), hotter-drier (HD), hotter-wetter (HW), and central tendency (CT). The future periods are labeled 2020s (for the years covering the period 2010–2039), 2050s (2040–2069), and 2080s (2070–2099) and the historical baseline period is 1950–1999. Visitors to this website are encouraged to reference the above report for additional information on the methods used and results available from this website, as well as a discussion on uncertainty pertaining to projections of future climate conditions located here.
There are two distinct sets of irrigation water demand projections for each scenario and future period. One assumes a fixed growing season for annual crops (static phenology) that is based on historical climate conditions and the other assumes an earlier and/or extended growing season for annual crops as a function of increasing future temperatures (non-static phenology). While earlier planting is likely in the future, socio-economic considerations come into play along with climate conditions. Hence these two sets of projections (static and non-static phenology) are meant to bracket the two extreme cases. Extended growing seasons due to higher temperatures are the default for all perennial crops in both sets of projections.
For most of the basins, the projections were calculated for each Hydrologic Unit Code 8 (HUC8) watershed, as defined by the U.S. Geological Survey, where irrigation currently occurs. The exceptions to this are the Colorado River Basin where a county and HUC8 intersection convention was used and the Sacramento/San Joaquin River Basins where California Department of Water Resources defined planning areas were used. The watersheds used are consistent with previous studies.
The analysis results presented in the report consist of average annual net irrigation water requirement (NIWR), crop evapotranspiration (ETc), reference ET (ETo), temperature and precipitation for the historical baseline period and each future period under the five scenarios. The future estimated annual values presented in the report were calculated as the average of the perturbed annual values from the 1950-1999 historical period. The perturbed values were calculated by applying change factors (multipliers for precipitation and additive for temperature) associated with each future period and scenario. These average annual results are available from this website in Excel spreadsheet format, as well as the individual annual values (not included in the report).
In addition to the annual and average annual results discussed above, certain historical and projected future daily results are available from this website. Specifically, values for ETc, ETo, temperature and precipitation for the period 1950-2099 (also not included in the report) are available from this website.
Click the buttons on the left to advance to the major river basin of interest.
The Colorado River Basin is located in the southwestern United States and occupies an area of approximately 250,000 square miles. The Colorado River is approximately 1,400 miles long and originates along the Continental Divide in Rocky Mountain National Park in Colorado and ends where it meets the Gulf of California in Mexico. There are approximately 2,978,740 acres of irrigated crop lands, over half of which are forage crops mostly in the Upper Basin with a large variety of fruits and vegetables in the Lower Basin.
The map at right shows the HUC8 watersheds within the basin and the locations of weather stations (Met Nodes) used in the estimation of historical and future irrigation demands. Data from one or more Met Nodes were used for each watershed. In most cases the Met Node(s) associated with a watershed are within the watershed, but Met Nodes located in adjacent watersheds are used in some cases.
Access the name and identification number of each HUC8 watershed by clicking within the watershed boundary, but not on a Met Node. Access the weather station name, identification number, location (latitude, longitude and altitude) and daily results (see link to instructions below) by clicking on a Met Node.
Click here to download a zip file containing spreadsheets with the annual and average annual results, and an Adobe® PDF “ReadMe” file with instructions. The spreadsheets include annual and average annual estimates of NIWR, ETc, ETo, temperature and precipitation values and the percent change for the future average annual values from the historical baseline values.
Daily estimates of ETc, ETo, temperature and precipitation for 1950-2099 under each scenario can be accessed by clicking on the weather station(s) associated with the watershed. The HUC8 watersheds were subdivided by county for the daily estimates in the Colorado Basin to be consistent with previous similar work. Click here to access instructions for downloading zip files that contain the historical and future daily estimates.
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Columbia River Basin
The Columbia River is the fourth largest river in North America, rising in the Rocky Mountains of British Columbia, Canada, and flowing 1,243 miles to the Pacific Ocean through Washington and Oregon. The Columbia River Basin is approximately 258,000 square miles, including approximately 15,117,035 acres of irrigated crop lands within the U.S. portion of the basin. Primary crops include potatoes, sugar beets, hops, fruits, vegetables, alfalfa, other hay and grains. The map at right shows the HUC8 watersheds within the basin and the locations of weather stations (Met Nodes) used in the estimation of historical and future irrigation demands. Data from one or more Met Nodes were used for each watershed. In most cases the Met Node(s) associated with a watershed are within the watershed, but Met Nodes located in adjacent watersheds are used in some cases.
Access the name and identification number of each HUC8 watershed by clicking within the watershed boundary, but not on a Met Node. Access the weather station name, identification number, location (latitude, longitude and altitude) and daily results (see link to instructions below) by clicking on a Met Node.
Click here to download a zip file containing spreadsheets with the annual and average annual results, and an Adobe® PDF “ReadMe” file with instructions. The spreadsheets include annual and average annual estimates of NIWR, ETc, ETo, temperature and precipitation values and the percent change for the future average annual values from the historical baseline values
Daily estimates of ETc, ETo, temperature and precipitation for 1950-2099 under each scenario can be accessed by clicking on the weather station(s) associated with the watershed. Click here to access instructions for downloading zip files that contain the historical and future daily estimates.
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Klamath River Basin
The Klamath River originates in headwater streams of south-central Oregon, eventually flowing southwest through the Cascade Range and picking up runoff from the Shasta, Scott, Salmon and Trinity Rivers in California, before flowing to the Pacific Ocean. The basin covers about 15,750 square miles, including approximately 363,475 acres of irrigated crop lands. Primary crops include alfalfa, other hay and grains.
The map at right shows the HUC8 watersheds within the basin and the locations of weather stations (Met Nodes) used in the estimation of historical and future irrigation demands. Data from one or more Met Nodes were used for each watershed. In most cases the Met Node(s) associated with a watershed are within the watershed, but Met Nodes located in adjacent watersheds are used in some cases.
Access the name and identification number of each HUC8 watershed and the name and identification number for all Met Nodes used for the watershed by clicking within the watershed boundary, but not on a Met Node. Access the weather station name, identification number, location (latitude, longitude and altitude) and daily results (see link to instructions below) by clicking on a Met Node.
Click here to download a zip file containing spreadsheets with the annual and average annual results, and an Adobe® PDF “ReadMe” file with instructions. The spreadsheets include annual and average annual estimates of NIWR, ETc, ETo, temperature and precipitation values and the percent change for the future average annual values from the historical baseline values.
Daily estimates of ETc, ETo, temperature and precipitation for 1950-2099 under each scenario can be accessed by clicking on the weather station(s) associated with the watershed. Click here to access instructions for downloading zip files that contain the historical and future daily estimates.
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Missouri River Basin
The Missouri is the longest river in the United States. It has a watershed of more than 500,000 square miles, includes portions of 10 states and two Canadian provinces, and encompasses approximately one-sixth of the United States. The Missouri drains the largest watershed within the United States and produces annual yields of 40 million acre-feet. There are approximately 14,818,200 acres of irrigated crop lands within the basin and over a third of the country's wheat, flax, barley and oats are grown in the basin. Forage crops are dominant in the northwestern portion of the basin and grains and vegetables are mostly grown in the southern portion.
The map at right shows the HUC8 watersheds within the basin and the locations of weather stations (Met Nodes) used in the estimation of historical and future irrigation demands. Data from one or more Met Nodes were used for each watershed. In most cases the Met Node(s) associated with a watershed are within the watershed, but Met Nodes located in adjacent watersheds are used in some cases.
Access the name and identification number of each HUC8 watershed by clicking within the watershed boundary, but not on a Met Node. Access the weather station name, identification number, location (latitude, longitude and altitude) and daily results (see link to instructions below) by clicking on a Met Node.
Click here to download a zip file containing spreadsheets with the annual and average annual results, and an Adobe® PDF “ReadMe” file with instructions. The spreadsheets include annual and average annual estimates of NIWR, ETc, ETo, temperature and precipitation values and the percent change for the future average annual values from the historical baseline values.
Daily estimates of ETc, ETo, temperature and precipitation for 1950-2099 under each scenario can be accessed by clicking on the weather station(s) associated with the watershed. Click here to access instructions for downloading zip files that contain the historical and future daily estimates.
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Rio Grande Basin
The Rio Grande provides water for irrigation, households, environmental, and recreational uses in Colorado, New Mexico, and Texas, as well as Mexico. Reclamation projects within the upper and middle portions of the basin include the Closed Basin Project, Colorado; the San Juan-Chama trans-mountain diversion project, between Colorado and New Mexico; the Middle Rio Grande Project, New Mexico; and the Rio Grande Project, in New Mexico and Texas. These projects plus non-project irrigation facilities support approximately 756,400 acres of irrigated agriculture in the upper and middle portions of the basin. Primary crops include alfalfa, cotton, vegetables, pecans and grain.
The map at right shows the HUC8 watersheds within the basin and the locations of weather stations (Met Nodes) used in the estimation of historical and future irrigation demands. Data from one or more Met Nodes were used for each watershed. In most cases the Met Node(s) associated with a watershed are within the watershed, but Met Nodes located in adjacent watersheds are used in some cases.
Access the name and identification number of each HUC8 watershed by clicking within the watershed boundary, but not on a Met Node. Access the weather station name, identification number, location (latitude, longitude and altitude) and daily results (see link to instructions below) by clicking on a Met Node.
Click here to download a zip file containing spreadsheets with the annual and average annual results, and an Adobe® PDF “ReadMe” file with instructions. The spreadsheets include annual and average annual estimates of NIWR, ETc, ETo, temperature and precipitation values and the percent change for the future average annual values from the historical baseline values
Daily estimates of ETc, ETo, temperature and precipitation for 1950-2099 under each scenario can be accessed by clicking on the weather station(s) associated with the watershed. Click here to access instructions for downloading zip files that contain the historical and future daily estimates.
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Sacramento and San Joaquin Basin
The Sacramento and San Joaquin Basins include three major Central Valley watersheds – the Sacramento River in the north and the San Joaquin River and Tulare Lake Basins in the south. The Central Valley, bounded by the Sierra Nevada on the east and Coastal Ranges on west, extends nearly 500 miles from northwest to southeast covering an area of approximately 18,000 square miles. The rivers – the two largest in California - meet in the Sacramento-San Joaquin Delta, the largest estuary on the West Coast and the hub of California’s complex water supply system. There are an estimated 6,277,365 acres of irrigated lands within the Central Valley and virtually all types of non-tropical crops are grown; including tomatoes, almonds, grapes, cotton, apricots, and asparagus.
The map at right shows the California Department of Water Resources defined watersheds within the basin and the locations of weather stations (Met Nodes) used in the estimation of historical and future irrigation demands. Data from one or more Met Nodes were used for each watershed. In most cases the Met Node(s) associated with a watershed are within the watershed, but Met Nodes located in adjacent watersheds are used in some cases.
Access the name and identification number of each defined planning area by clicking within the watershed boundary, but not on a Met Node. Access the weather station name, identification number, location (latitude, longitude and altitude) and daily results (see link to instructions below) by clicking on a Met Node.
Click here to download a zip file containing spreadsheets with the annual and average annual results, and an Adobe® PDF “ReadMe” file with instructions. The spreadsheets include annual and average annual estimates of NIWR, ETc, ETo, temperature and precipitation values and the percent change for the future average annual values from the historical baseline values
Daily estimates of ETc, ETo, temperature and precipitation for 1950-2099 under each scenario can be accessed by clicking on the weather station(s) associated with the watershed. Click here to access instructions for downloading zip files that contain the historical and future daily estimates.
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Truckee River Basin
The Truckee and Carson Rivers are major sources of water for western Nevada including approximately 234,025 acres of irrigated crop lands. Primary crops include alfalfa, other hay and grains. The map at right shows the HUC8 watersheds within the basin and the locations of weather stations (Met Nodes) used in the estimation of historical and future irrigation demands. Data from one or more Met Nodes were used for each watershed. In most cases the Met Node(s) associated with a watershed are within the watershed, but Met Nodes located in adjacent watersheds are used in some cases.
Access the name and identification number of each HUC8 watershed by clicking within the watershed boundary, but not on a Met Node. Access the weather station name, identification number, location (latitude, longitude and altitude) and daily results (see link to instructions below) by clicking on a Met Node.
Click here to download a zip file containing spreadsheets with the annual and average annual results, and an Adobe PDF “ReadMe” file with instructions. The spreadsheets include annual and average annual estimates of NIWR, ETc, ETo, temperature and precipitation values and the percent change for the future average annual values from the historical baseline values.
Daily estimates of ETc, ETo, temperature and precipitation for 1950-2099 under each scenario can be accessed by clicking on the weather station(s) associated with the watershed. Click here to access instructions for downloading zip files that contain the historical and future daily estimates.
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Irrigation Demand Projections
The Bureau of Reclamation (Reclamation) has collaborated with the Desert Research Institute and the University of Idaho in the development of a state-of-the-science computerized evapotranspiration (ET) model (ET Demands) that is being used to estimate historical and future agricultural irrigation water demands for the Western United States. Reclamation published an Irrigation Demand and Reservoir Evaporation Projections report as a Baseline Water Assessment activity under the WaterSMART Basin Study Program in 2015. The technical memorandum report provides an analysis of future changes in irrigation water demand across Reclamation’s major river basins (Colorado, Columbia, Klamath, Missouri, Rio Grande, Sacramento/San Joaquin and Truckee/Carson). The technical assessment report provides an analysis of future changes in irrigation water demand across Reclamation’s major river basins (Colorado, Columbia, Klamath, Missouri, Rio Grande, Sacramento/San Joaquin and Truckee/Carson).
The irrigation water demands analysis incorporates five scenarios for three future periods based on global climate models and current cropping patterns. The scenarios are warmer-drier (WD), warmer-wetter (WW), hotter-drier (HD), hotter-wetter (HW), and central tendency (CT). The future periods are labeled 2020s (for the years covering the period 2010–2039), 2050s (2040–2069), and 2080s (2070–2099) and the historical baseline period is 1950–1999. Visitors to this website are encouraged to reference the above report for additional information on the methods used and results available from this website, as well as a discussion on uncertainty pertaining to projections of future climate conditions located here.
There are two distinct sets of irrigation water demand projections for each scenario and future period. One assumes a fixed growing season for annual crops (static phenology) that is based on historical climate conditions and the other assumes an earlier and/or extended growing season for annual crops as a function of increasing future temperatures (non-static phenology). While earlier planting is likely in the future, socio-economic considerations come into play along with climate conditions. Hence these two sets of projections (static and non-static phenology) are meant to bracket the two extreme cases. Extended growing seasons due to higher temperatures are the default for all perennial crops in both sets of projections.
For most of the basins, the projections were calculated for each Hydrologic Unit Code 8 (HUC8) watershed, as defined by the U.S. Geological Survey, where irrigation currently occurs. The exceptions to this are the Colorado River Basin where a county and HUC8 intersection convention was used and the Sacramento/San Joaquin River Basins where California Department of Water Resources defined planning areas were used. The watersheds used are consistent with previous studies.
The analysis results presented in the report consist of average annual net irrigation water requirement (NIWR), crop evapotranspiration (ETc), reference ET (ETo), temperature and precipitation for the historical baseline period and each future period under the five scenarios. The future estimated annual values presented in the report were calculated as the average of the perturbed annual values from the 1950-1999 historical period. The perturbed values were calculated by applying change factors (multipliers for precipitation and additive for temperature) associated with each future period and scenario. These average annual results are available from this website in Excel spreadsheet format, as well as the individual annual values (not included in the report).
In addition to the annual and average annual results discussed above, certain historical and projected future daily results are available from this website. Specifically, values for ETc, ETo, temperature and precipitation for the period 1950-2099 (also not included in the report) are available from this website.
Click the buttons on the left to advance to the major river basin of interest.
The Colorado River Basin is located in the southwestern United States and occupies an area of approximately 250,000 square miles. The Colorado River is approximately 1,400 miles long and originates along the Continental Divide in Rocky Mountain National Park in Colorado and ends where it meets the Gulf of California in Mexico. There are approximately 2,978,740 acres of irrigated crop lands, over half of which are forage crops mostly in the Upper Basin with a large variety of fruits and vegetables in the Lower Basin.
The map at right shows the HUC8 watersheds within the basin and the locations of weather stations (Met Nodes) used in the estimation of historical and future irrigation demands. Data from one or more Met Nodes were used for each watershed. In most cases the Met Node(s) associated with a watershed are within the watershed, but Met Nodes located in adjacent watersheds are used in some cases.
Access the name and identification number of each HUC8 watershed by clicking within the watershed boundary, but not on a Met Node. Access the weather station name, identification number, location (latitude, longitude and altitude) and daily results (see link to instructions below) by clicking on a Met Node.
Click here to download a zip file containing spreadsheets with the annual and average annual results, and an Adobe® PDF “ReadMe” file with instructions. The spreadsheets include annual and average annual estimates of NIWR, ETc, ETo, temperature and precipitation values and the percent change for the future average annual values from the historical baseline values.
Daily estimates of ETc, ETo, temperature and precipitation for 1950-2099 under each scenario can be accessed by clicking on the weather station(s) associated with the watershed. The HUC8 watersheds were subdivided by county for the daily estimates in the Colorado Basin to be consistent with previous similar work. Click here to access instructions for downloading zip files that contain the historical and future daily estimates.
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Columbia River Basin
The Columbia River is the fourth largest river in North America, rising in the Rocky Mountains of British Columbia, Canada, and flowing 1,243 miles to the Pacific Ocean through Washington and Oregon. The Columbia River Basin is approximately 258,000 square miles, including approximately 15,117,035 acres of irrigated crop lands within the U.S. portion of the basin. Primary crops include potatoes, sugar beets, hops, fruits, vegetables, alfalfa, other hay and grains. The map at right shows the HUC8 watersheds within the basin and the locations of weather stations (Met Nodes) used in the estimation of historical and future irrigation demands. Data from one or more Met Nodes were used for each watershed. In most cases the Met Node(s) associated with a watershed are within the watershed, but Met Nodes located in adjacent watersheds are used in some cases.
Access the name and identification number of each HUC8 watershed by clicking within the watershed boundary, but not on a Met Node. Access the weather station name, identification number, location (latitude, longitude and altitude) and daily results (see link to instructions below) by clicking on a Met Node.
Click here to download a zip file containing spreadsheets with the annual and average annual results, and an Adobe® PDF “ReadMe” file with instructions. The spreadsheets include annual and average annual estimates of NIWR, ETc, ETo, temperature and precipitation values and the percent change for the future average annual values from the historical baseline values
Daily estimates of ETc, ETo, temperature and precipitation for 1950-2099 under each scenario can be accessed by clicking on the weather station(s) associated with the watershed. Click here to access instructions for downloading zip files that contain the historical and future daily estimates.
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Klamath River Basin
The Klamath River originates in headwater streams of south-central Oregon, eventually flowing southwest through the Cascade Range and picking up runoff from the Shasta, Scott, Salmon and Trinity Rivers in California, before flowing to the Pacific Ocean. The basin covers about 15,750 square miles, including approximately 363,475 acres of irrigated crop lands. Primary crops include alfalfa, other hay and grains.
The map at right shows the HUC8 watersheds within the basin and the locations of weather stations (Met Nodes) used in the estimation of historical and future irrigation demands. Data from one or more Met Nodes were used for each watershed. In most cases the Met Node(s) associated with a watershed are within the watershed, but Met Nodes located in adjacent watersheds are used in some cases.
Access the name and identification number of each HUC8 watershed and the name and identification number for all Met Nodes used for the watershed by clicking within the watershed boundary, but not on a Met Node. Access the weather station name, identification number, location (latitude, longitude and altitude) and daily results (see link to instructions below) by clicking on a Met Node.
Click here to download a zip file containing spreadsheets with the annual and average annual results, and an Adobe® PDF “ReadMe” file with instructions. The spreadsheets include annual and average annual estimates of NIWR, ETc, ETo, temperature and precipitation values and the percent change for the future average annual values from the historical baseline values.
Daily estimates of ETc, ETo, temperature and precipitation for 1950-2099 under each scenario can be accessed by clicking on the weather station(s) associated with the watershed. Click here to access instructions for downloading zip files that contain the historical and future daily estimates.
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Missouri River Basin
The Missouri is the longest river in the United States. It has a watershed of more than 500,000 square miles, includes portions of 10 states and two Canadian provinces, and encompasses approximately one-sixth of the United States. The Missouri drains the largest watershed within the United States and produces annual yields of 40 million acre-feet. There are approximately 14,818,200 acres of irrigated crop lands within the basin and over a third of the country's wheat, flax, barley and oats are grown in the basin. Forage crops are dominant in the northwestern portion of the basin and grains and vegetables are mostly grown in the southern portion.
The map at right shows the HUC8 watersheds within the basin and the locations of weather stations (Met Nodes) used in the estimation of historical and future irrigation demands. Data from one or more Met Nodes were used for each watershed. In most cases the Met Node(s) associated with a watershed are within the watershed, but Met Nodes located in adjacent watersheds are used in some cases.
Access the name and identification number of each HUC8 watershed by clicking within the watershed boundary, but not on a Met Node. Access the weather station name, identification number, location (latitude, longitude and altitude) and daily results (see link to instructions below) by clicking on a Met Node.
Click here to download a zip file containing spreadsheets with the annual and average annual results, and an Adobe® PDF “ReadMe” file with instructions. The spreadsheets include annual and average annual estimates of NIWR, ETc, ETo, temperature and precipitation values and the percent change for the future average annual values from the historical baseline values.
Daily estimates of ETc, ETo, temperature and precipitation for 1950-2099 under each scenario can be accessed by clicking on the weather station(s) associated with the watershed. Click here to access instructions for downloading zip files that contain the historical and future daily estimates.
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Rio Grande Basin
The Rio Grande provides water for irrigation, households, environmental, and recreational uses in Colorado, New Mexico, and Texas, as well as Mexico. Reclamation projects within the upper and middle portions of the basin include the Closed Basin Project, Colorado; the San Juan-Chama trans-mountain diversion project, between Colorado and New Mexico; the Middle Rio Grande Project, New Mexico; and the Rio Grande Project, in New Mexico and Texas. These projects plus non-project irrigation facilities support approximately 756,400 acres of irrigated agriculture in the upper and middle portions of the basin. Primary crops include alfalfa, cotton, vegetables, pecans and grain.
The map at right shows the HUC8 watersheds within the basin and the locations of weather stations (Met Nodes) used in the estimation of historical and future irrigation demands. Data from one or more Met Nodes were used for each watershed. In most cases the Met Node(s) associated with a watershed are within the watershed, but Met Nodes located in adjacent watersheds are used in some cases.
Access the name and identification number of each HUC8 watershed by clicking within the watershed boundary, but not on a Met Node. Access the weather station name, identification number, location (latitude, longitude and altitude) and daily results (see link to instructions below) by clicking on a Met Node.
Click here to download a zip file containing spreadsheets with the annual and average annual results, and an Adobe® PDF “ReadMe” file with instructions. The spreadsheets include annual and average annual estimates of NIWR, ETc, ETo, temperature and precipitation values and the percent change for the future average annual values from the historical baseline values
Daily estimates of ETc, ETo, temperature and precipitation for 1950-2099 under each scenario can be accessed by clicking on the weather station(s) associated with the watershed. Click here to access instructions for downloading zip files that contain the historical and future daily estimates.
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Sacramento and San Joaquin Basin
The Sacramento and San Joaquin Basins include three major Central Valley watersheds – the Sacramento River in the north and the San Joaquin River and Tulare Lake Basins in the south. The Central Valley, bounded by the Sierra Nevada on the east and Coastal Ranges on west, extends nearly 500 miles from northwest to southeast covering an area of approximately 18,000 square miles. The rivers – the two largest in California - meet in the Sacramento-San Joaquin Delta, the largest estuary on the West Coast and the hub of California’s complex water supply system. There are an estimated 6,277,365 acres of irrigated lands within the Central Valley and virtually all types of non-tropical crops are grown; including tomatoes, almonds, grapes, cotton, apricots, and asparagus.
The map at right shows the California Department of Water Resources defined watersheds within the basin and the locations of weather stations (Met Nodes) used in the estimation of historical and future irrigation demands. Data from one or more Met Nodes were used for each watershed. In most cases the Met Node(s) associated with a watershed are within the watershed, but Met Nodes located in adjacent watersheds are used in some cases.
Access the name and identification number of each defined planning area by clicking within the watershed boundary, but not on a Met Node. Access the weather station name, identification number, location (latitude, longitude and altitude) and daily results (see link to instructions below) by clicking on a Met Node.
Click here to download a zip file containing spreadsheets with the annual and average annual results, and an Adobe® PDF “ReadMe” file with instructions. The spreadsheets include annual and average annual estimates of NIWR, ETc, ETo, temperature and precipitation values and the percent change for the future average annual values from the historical baseline values
Daily estimates of ETc, ETo, temperature and precipitation for 1950-2099 under each scenario can be accessed by clicking on the weather station(s) associated with the watershed. Click here to access instructions for downloading zip files that contain the historical and future daily estimates.
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Truckee River Basin
The Truckee and Carson Rivers are major sources of water for western Nevada including approximately 234,025 acres of irrigated crop lands. Primary crops include alfalfa, other hay and grains. The map at right shows the HUC8 watersheds within the basin and the locations of weather stations (Met Nodes) used in the estimation of historical and future irrigation demands. Data from one or more Met Nodes were used for each watershed. In most cases the Met Node(s) associated with a watershed are within the watershed, but Met Nodes located in adjacent watersheds are used in some cases.
Access the name and identification number of each HUC8 watershed by clicking within the watershed boundary, but not on a Met Node. Access the weather station name, identification number, location (latitude, longitude and altitude) and daily results (see link to instructions below) by clicking on a Met Node.
Click here to download a zip file containing spreadsheets with the annual and average annual results, and an Adobe PDF “ReadMe” file with instructions. The spreadsheets include annual and average annual estimates of NIWR, ETc, ETo, temperature and precipitation values and the percent change for the future average annual values from the historical baseline values.
Daily estimates of ETc, ETo, temperature and precipitation for 1950-2099 under each scenario can be accessed by clicking on the weather station(s) associated with the watershed. Click here to access instructions for downloading zip files that contain the historical and future daily estimates.
