REPUBLICAN RIVER GROUND WATER MODEL

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REPUBLICAN RIVER GROUND WATER MODEL

• Western States Water Council
• December 5, 2003

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GENESIS OF THE REPUBLICAN RIVER COMPACT
ADMINISTRATION MODEL

• Kansas v Nebraska and Colorado No. 126 Original
• All groundwater included to the extent it
  depletes Republican River streamflows.
• Final settlement Stipulation
• First Report of the Special Master

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PURPOSE OF THE RRCA MODEL

• Determine the amount, location, and timing of
• Streamflow Depletions to the Republican River
  caused by well pumping.
• Streamflow accretions from recharge of water
  imported from the Platte River Basin into the
  Republican River Basin
• Represent the groundwater flow system in the
  Republican River Basin

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MANAGEMENT OF THE RRCA MODEL

• Authority of the State/Chief Engineers
• Model Committee
• Data and Information Sharing
• Work Process
• Dispute Resolution
• Timeline May 2002 to June 30, 2003

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CONCLUSION

• RRCA Model calibration represents the physical
  hydrogeological characteristics to a reasonable
  degree
• Provides required output (depletions/accretions)
  in format that is applied to annual RRCA
  Accounting Procedures
• Annual updates