Aspects of Groundwater in the Yakima River Basin

STUDY COMPONENTS

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Ground-Water Usage in Yakima River Basin

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Water Level Declines

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MODFLOW-2000

• MODFLOW-2000
• 6,900 mi2
• 600 rows, 600 columns, 24 layers
• 1,000 ft x 1,000 ft cells
• 44 hydrogeologic units
• 4.6 billion active cells
• Simulation period: 1960-2001
• 504 1-month stress periods

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