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Boise River AccountingLiz Cresto
February 26, 2013
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Water Rights Accounting Purpose
• It is a tool to help the water master regulate the river.
• There are currently 391 water rights in the accounting.
• 78 Diversions.• 3 storage reservoirs.
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What does the water right accounting program do?
• Calculates the natural flow in the river at various key locations.
• Based on the natural flow available it determines what water rights are in priority.
• Determines storage use.• Determines reservoir fill.
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What doesn’t the water right accounting program do?
• It does not determine the initial storage allocation.
• It is not real-time. It is after the fact.
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DefinitionsNatural Flow: The water that would be in the
river if there were no diversions or reservoirs.Day of Allocation: The day of year when there is
not enough natural flow to meet irrigation demand and on or after the date of maximum reservoir fill.
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How it works• Rex gathers canal data and sends it to IDWR.• IDWR gathers reservoir and flow data from various
sources.• Run the accounting program.– Infrequently in the winter.– Weekly during the irrigation season.
• Send Daily Report– Send to Rex to distribute via email.– Post to IDWR’s website.
(http://www.idwr.idaho.gov/WaterManagement/WaterDistricts/BoiseRiver/default.htm)
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River Reach
River Flow Section
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River ReachData Date
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River ReachData Date
Natural Flow
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River ReachData Date
Natural Flow
Actual Flow (the physical flow in the river)
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River ReachData Date
Natural Flow
Actual Flow (the physical flow in the river)
Remaining Natural Flow(Natural flow available in that reach after natural flow diversions have been taken out)
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River ReachData Date
Natural Flow
Actual Flow (the physical flow in the river)
Remaining Natural Flow(Natural flow available in that reach after natural flow diversions have been taken out)
Note: 0 Remaining Natural Flow at Middleton means that there is not enough natural flow in the river to meet irrigation demand. Storage water must be released to meet demand.
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River Reach Data DateNatural Flow
Actual Flow (the physical flow in the river)
Remaining Natural Flow(Natural flow available in that reach after natural flow diversions have been taken out)
Operational Flow(Flow needed to be physically in the river so that diversions have enough head to actually divert)
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River Reach Data DateNatural Flow
Actual Flow (the physical flow in the river)
Remaining Natural Flow(Natural flow available in that reach after natural flow diversions have been taken out)
Operational Flow(Flow needed to be physically in the river so that diversions have enough head to actually divert)
Stored Flow
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River Reach Data DateNatural Flow
Actual Flow (the physical flow in the river)
Remaining Natural Flow(Natural flow available in that reach after natural flow diversions have been taken out)
Stored Flow
Operational Flow(Flow needed to be physically in the river so that diversions have enough head to actually divert)
Example: 3,953 cfs was released from Arrowrock, of that 3,179 cfs was storage water released from the reservoir.
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River Reach Data DateNatural Flow
Actual Flow (the physical flow in the river)
Remaining Natural Flow(Natural flow available in that reach after natural flow diversions have been taken out)
Stored Flow
Operational Flow(Flow needed to be physically in the river so that diversions have enough head to actually divert)
Reservoir Evaporation
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River Reach Data DateNatural Flow
Actual Flow (the physical flow in the river)
Remaining Natural Flow(Natural flow available in that reach after natural flow diversions have been taken out)
Stored Flow
Operational Flow(Flow needed to be physically in the river so that diversions have enough head to actually divert)
Reservoir EvaporationNatural Flow Diversions
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River Reach Data DateNatural Flow
Actual Flow (the physical flow in the river)
Remaining Natural Flow(Natural flow available in that reach after natural flow diversions have been taken out)
Stored Flow
Operational Flow(Flow needed to be physically in the river so that diversions have enough head to actually divert)
Reservoir EvaporationNatural Flow Diversions
Total Diversions
Example: In the reach ending at Diversion Dam, there was 2,255 cfs diverted, of which 27 cfs was natural flow. (2,228 cfs was storage water)
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River Reach Data DateNatural Flow
Actual Flow (the physical flow in the river)
Remaining Natural Flow(Natural flow available in that reach after natural flow diversions have been taken out)
Stored Flow
Operational Flow(Flow needed to be physically in the river so that diversions have enough head to actually divert)
Reservoir EvaporationNatural Flow Diversions
Total Diversions
Reach Gains. (negative means a loss in that reach).
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River Reach Data DateNatural Flow
Actual Flow (the physical flow in the river)
Remaining Natural Flow(Natural flow available in that reach after natural flow diversions have been taken out)
Stored Flow
Operational Flow(Flow needed to be physically in the river so that diversions have enough head to actually divert)
Reservoir EvaporationNatural Flow Diversions
Total Diversions
Reach Gains. (negative means a loss in that reach).
Priority Date
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What rights are in priority?
1. What Decree(s) is in priority?2. What percentage within the Stewart or
Bryan Decree?3. What is the date?
Answer: Any Stewart Decree water right with a priority date of June 1, 1886 or earlier can take 60% of their decreed right.
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Previous Contents (Yesterday)Current ContentsChange in Contents
Reservoir Contents Section
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Previous Contents (Yesterday)Current ContentsChange in Contents
Accrual to Storage: The amount of water credited towards filling the storage water right that day.
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Previous Contents (Yesterday)Current ContentsChange in Contents
Accrual to Storage: The amount of water credited towards filling the storage water right that day.
Total Storage: The total storage credited towards filling the storage water right.
Note: This example is from August 27, 2012. On August 15th of every year, the program resets the total storage to 0 AF. This done so that if there is any late season run off, it can be credited towards filling storage rights.
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Previous Contents (Yesterday)Current ContentsChange in Contents
Accrual to Storage: The amount of water credited towards filling the storage water right that day.
Total Storage: The total storage credited towards filling the storage water right.
Total Evaporation
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Reservoirs: Listed in order by priority date. 5 and 6 are the Last to Fill space in Anderson and Lucky Peak . 7 is the Anderson Last Last to Fill (flow augmentation released from the Bureau’s powerhead space).
Reservoir Right Table
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Right: How much space is dedicated to each of the different spaces.
Reservoirs: Listed in order by priority date. 5 and 6 are the Last to Fill space in Anders on and Lucky Peak . 7 is the Anderson Last Last to Fill (flow augmentation released from the Bureau’s powerhead space).
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Right: How much space is dedicated to each of the different spaces.
Reservoirs: Listed in order by priority date. 5 and 6 are the Last to Fill space in Anders on and Lucky Peak . 7 is the Anderson Last Last to Fill (flow augmentation released from the Bureau’s powerhead space).
Stored: How much of the right has filled. Remember this is August 27th and the rights have been reset to allow for late season fill.
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Year-to-Date Information
Storage Used: Total canal storage use.
Change in Content: Year to date change in reservoir contents.
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Year-to-Date Information
Storage Used: Total canal storage use.Change in Content: Year to date change in reservoir contents.
Middleton Storage: Total storage that passed Middleton. This is the total storage water that left the basin. Typically includes operational loss and flow augmentation.
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Year to Date Information
Storage Used: Total canal storage use.Change in Content: Year to date change in reservoir contents.
Middleton Storage: Total storage that passed Middleton. This is the total storage water that left the basin. Typically includes operational loss and flow augmentation.Total Stored: Total storage credited to the storage rights. Note: this number has been reset to 0 to allow for late season fill.
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Year to Date Information
Storage Used: Total canal storage use.Change in Content: Year to date change in reservoir contents.
Middleton Storage: Total storage that passed Middleton. This is the total storage water that left the basin. Typically includes operational loss and flow augmentation.Total Stored: Total storage credited to the storage rights. Note this number has been reset to 0 to allow for late season fill.Unaccounted for Storage: Natural flow stored after reservoir rights have filled and during flood control operations.
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Averaging Error: The difference between what the model thinks the reservoir contents should be and what is physically in the reservoirs.
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Diversion Name
Canal Data
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Diversion Name
Canal Data
CFS Diversion: This is the canal diversion rate in cfs.
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Diversion Name
Canal Data
CFS Diversion: This is the canal diversion rate in cfs.
CFS Stored: The portion of what was diverted charged to storage.
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Diversion Name
Canal Data
CFS Diversion: This is the canal diversion rate in cfs.
CFS Stored: The portion of what was diverted charged to storage.
AF Used: Total acre-feet of storage used.
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Diversion Name
Canal Data
CFS Diversion: This is the canal diversion.
CFS Stored: The portion of what was diverted charged to storage.
AF Used: Total acre-feet of storage used.
AF Remaining: Remaining storage available in the canal’s storage account.
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Diversion Name
Canal Data
CFS Diversion: This is the canal diversion rate in cfs.
CFS Stored: The portion of the what was diverted charged to storage.
AF Used: Total acre-feet of storage used.
AF Remaining: Remaining storage available in the canal’s storage account.Example: Ridenbaugh canal diverted 445 cfs on August 27, 2012. 343 cfs of the 445cfs diverted was storage water. They have used a total of 16,223 acre-feet this season and have 19,893 acre-feet remaining in their account.
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Examples
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Questions?
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IDWR Web ResourcesWater District Website:
http://www.idwr.idaho.gov/WaterManagement/WaterDistricts/BoiseRiver/default.htm
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Historical Records: The input data to the water rights accounting program.
Water Rights Accounting data: The results of the water rights accounting program.
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Contact Information:Liz [email protected]