Water-year analysis for Lake Powell hydrology and operations.
Lake Powell metrics in water-year framing (October 1 through September 30).
Sources
/data/reservoirs/lake-powell-water-year.json/data/reservoirs/lake-powell.json
Notes
Current Snapshot
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Daily Inflow (Full Record)
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Yearly Inflow (Full Record, Water Year Totals)
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Daily Inflow (Last 10 Years)
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Yearly Inflow (Last 10 Water Years)
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Yearly Inflow to Date (All Water Years, Matched to Current WY Day)
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Daily Elevation (Full Record)
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Note for annotation: minimum power pool (~3490 ft) is approximately 3.49 million acre-feet using a sediment-capacity correction (legacy estimate ~4.02M AF minus ~0.535M AF lost capacity). Exact value should come from an updated stage-storage curve.
Yearly Elevation Change (Water Year, End - Start)
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Daily Storage (Full Record)
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Yearly Storage Change (Water Year, End - Start)
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Daily Storage (Last 5 Years)
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Daily Storage (Water Year 2022)
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Note: The Jul 2022 shift likely reflects updated elevation-area-capacity assumptions informed by sediment survey work; see USGS SIR 2022-5017.
Area vs Elevation (All Daily Points)
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Daily Inflow (Last Year)
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Daily Inflow (Last Year, Anomaly Focus)
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Elevation (Last Year)
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Yearly Evaporation (Water Year Totals)
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Water Year Balance Check ((Inflow - Evaporation - Release) vs Storage Change)
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Balance note: for these annual terms, storage change can be approximated as ΔStorage ≈ Inflow - Release - Evaporation - Bank Storage.
Yearly Inflow vs Unregulated Inflow (Water Year Totals)
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Water Year Balance Check ((Unregulated Inflow - Evaporation - Release) vs Storage Change)
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