Open Water Use Forum Webinar Overview of 2015 Compilation Molly Maupin Idaho Water Science Center National Water Use Science Team Lead February 10, 2016

Outline  Introduction  Water Use Concepts  2015 Compilation  Data Elements/Categories  Documentation  Compilation Process  Timelines  Categories (Pop/PS/DO)

Water Use Mission: The USGS National Water-Use Information program compiles and disseminates estimates of the Nation's water use on a 5-year annual cycle. Goals: Analyze the source, use, and disposition of water at different scales Document trends in water use in the United States Cooperate with state and local agencies on projects Develop water-use data bases Publish local, state, and national water-use data reports Reply to water-use information requests from the public

Water Use Concepts  Interaction of man and the hydrologic cycle  Water that is used for certain purposes

Water-Use Concepts SourceDispositionUse

Water Use Concepts Source  Offstream  Withdrawal: Water removed from a ground-water source or diverted from a surface-water source  Instream  Water is used in stream channel (hydroelectric)/navigation)

Water Use Concepts Source – Reclaimed Wastewater Wastewater treatment plant effluent that has been diverted for beneficial use before it reaches a natural waterway or aquifer

Water Use Concepts Categories of Use  Domestic  Industrial  Thermoelectric Power  Irrigation  Livestock  Aquaculture  Mining

Water Use Concepts Public Supply  Public suppliers withdraws, treat, and distribute water  Deliveries to end users  Domestic (since 2000)

Water Use Concepts Disposition  Consumptive Use  Return Flow  Conveyance Loss

Water Use Concepts Consumptive use  That part of water withdrawn that:  evaporates,  transpires,  is incorporated into products or crops,  is consumed by humans or livestock, or  is otherwise removed from the immediate water environment

Water Use Concepts Return flow  Quantity of water discharged after use to surface or ground water so it becomes available for use

Water Use Concepts Conveyance Loss  Water that is lost in transit from a pipe, canal, conduit, or ditch by leakage or evaporation

Water Use Concepts Databases  Tune in 2/24/16 for webinar on our databases  Site-Specific Data (Geographically tracks water use)  Aggregated Data (Summarizes Water Use annually)

Water Use Concepts Aggregate Data  Total annual average daily withdrawal  Area (County, HUC, Aquifer)  Water sources  Surface water, fresh and saline  Groundwater, fresh and saline  Categories of use

2015 Compilation  Water Data  Withdrawals and deliveries  Consumptive use  Ancillary data (people/power/acres)  Total population (provided)  Population served by Public Supply  Power production  Irrigated acres

2015 Compilation Mandatory Categories  Water Science Center:  Public Supply  Domestic  Industrial  Irrigation (Total)  National Program Provides:  Thermoelectric Power  Mining  Livestock  Aquaculture Must compile for all counties

2015 Compilation Mandatory Data Elements  Freshwater withdrawals  Saline withdrawals (where appropriate)  Deliveries to Domestic  Reclaimed wastewater (nulls allowed)  Total Population  Population Served  Acres Irrigated by type  Power Generated  Consumptive Use  Irrigation  Thermoelectric Power

2015 Compilation Optional Categories Can compile for any area (HUC8/County/Aquifer)  Self-supplied Commercial  Hydroelectric Power  Public-supply deliveries to Commercial, Industrial, Thermoelectric  Wastewater Treatment Returns  Reservoir Evaporation  Irrigation (Crop/Golf course split)—but Total irrigation is mandatory

2015 – County

2015 – HUC

2015 – Aquifer

Documentation  Required when data are submitted to review  Provides explanation of what was done, how, why, changes in data from 2010  Leave tracks for the next compilation  Word document template  One document per State

Documentation  Sources – contact information  Methods  Quality-control checks  Assumptions and reasons  Coefficients  How missing data were estimated  References

Documentation  Where and how data are stored  Original files -- basic data files  Working files -- spreadsheets  Final data sets  Aggregated files -- AWUDS  Locations of electronic and paper files

Compilation Process  Identify data sources  Compile the data  Document process and results  Data review  In-house  Regional  National

Compilation Process In-House Data Review  Review aggregated data  Check for errors  Ranking  Comparisons with previous years’ data  When In-House review is complete, transfer data in AWUDS to “In-Review”

Compilation Process Regional Data Review  Check for completeness of data  Review documentation for explanations of changes from 2010  Comparison between States within the Region  Comparison with previous years’ data

Compilation Process National Data Review  Comparison among States  Comparison with previous years’ data  Not final until regional review of documentation and national review of data are completed.

Timelines  March, all categories except Thermoelectric Power  October, 2017 – Thermoelectric Power  Potential: dataset releases for nationally completed categories

Resources  Regional Water-Use Specialists  Northeast – Cheryl Dieter,  Southeast – Melissa Harris,  Central – Tammy Ivahnenko,  West – Rod Caldwell, Databases Nancy Barber, Livestock, Mining, Aquaculture John Lovelace,

Compilation Guidelines  We are working to post electronic compilation of historical and current (2015) guidelines.  Guidelines for preparation of State water-use estimates  Covers mandatory categories  Definitions  Data sources  Compilation techniques

Population, Public Supply, and Domestic Water Use Categories

Public Supply Examples:  Cities, water districts, mobile home parks, nursing homes, Indian reservations, military bases  Withdraw and/or purchase water Examples that are NOT counted in the Public Supply category:  Campgrounds, hospitals, schools,

Inventory of Public Suppliers  Names of water suppliers  Sources of water – GW and SW  Purchases between Public Suppliers  Population served  Location of population served

Public Use and Losses  Public use is water that is used for public services such as public swimming pools, parks, firefighting and public buildings.  Losses are unaccounted for water, such as leakage from distribution pipes.  Not a data element, but calculated in database.

Total Public Supply Withdrawals Domestic Self- Supplied Withdrawals Public supply deliveries Public use and losses Total Population Commercial Domestic Thermoelectric Industrial Population served by Public Supply Self-supplied population Total Domestic Withdrawals

Domestic water use  Household uses, indoor and outdoor  Domestic deliveries  water provided by public supply. Source identified with PWS. Included with PWS total withdrawal.  Self-supplied domestic withdrawals  Self- supplied from wells, springs, rainwater, hauled ….  Total Domestic= Deliveries + Self-supplied

Midville Distribution System Well #1 Diversion Well #2 Northton Distribution System Great Miami River Public-Supply System Example #1 Easy County

Midville Distribution System Well #1 Diversion Well #2 Northton Distribution System Great Miami River Public-Supply System Example #2 Easy County Complicated County

Example Survey  Survey sent by and returned to State agency !  System withdrawals  System deliveries  Population  Residences  Connections  Estimates

Helpful information to get  Sales to single-family and multi-family dwellings – units!  Numbers of service connections  Deliveries to other uses, esp. large users  Public uses  Losses – unaccounted for water  Population characteristics

Domestic self-supplied  Source of water  Self-supplied population x gpcd coefficient  Relation to population served  2010 National coefficients ~ gpcd  Coefficients based on delivery data; usually larger

Selecting domestic coefficients  Self-supplied = public supplied  Self-supplied < public supplied  Self-supplied > public supplied  Significance of self-supplied population

QA/QC – Domestic Deliveries  Population served < County population  Change in population served since 2010  Total gpcd – reasonable or not  Domestic deliveries as % of total

Question