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Reservoirs

Reservoirs. CBRFC 2011 Stakeholder Forum November 3, 2011. Benefits to S haring Reservoir Data/Information. More accurate forecasts of future reservoir elevations. Decision support tool for reservoir operators. More accurate forecasts of downstream flows.

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Reservoirs

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  1. Reservoirs CBRFC 2011 Stakeholder Forum November 3, 2011

  2. Benefits to Sharing Reservoir Data/Information • More accurate forecasts of future reservoir elevations. • Decision support tool for reservoir operators. • More accurate forecasts of downstream flows. • Better information for downstream interests.

  3. Short Term – What We Need • Real time observed data for reservoirs and diversions. • Make sure our starting conditions are correct. • Short term (~10 day) reservoir release schedules and diversion plans. • Help with daily forecasting. • We assume current releases will remain constant if we have no other information (and not spilling). • Assume either current diversion levels or constant flow left in the river. • Especially important when reservoir is getting close to spill, but reservoir operations are planned to avoid/reduce spill. • Our forecasts will show big rises downstream due to expected spill.

  4. Daily Forecasts – Releases No Release Schedule Release Schedule Reservoir Outflow Downstream Site

  5. Daily Forecasts – Diversions Steady Diversion Changing Diversion Simulated River Flow Diversion Flow

  6. Long Term – What We Need • Long term reservoir plans. • Help with long lead peak flow forecasts and river flows (e.g. CROS). • Can also affect water supply volume forecasts to some degree (e.g. Powell) • Would especially like general plans for early season (~Jan-Mar) leading into runoff season. • Will allow our model to have better initial reservoir levels for the start of the runoff. • When rules kick in beyond planned releases, results will be more reasonable for spill conditions.

  7. Regulated Esp Spill Spill Reservoir rules Reservoir rules Flood Stage

  8. Summary – What We Need • Real time observed data for reservoirs and diversions. • Make sure our starting conditions are correct. • Short term (~10 day) reservoir release schedules and diversion plans. • Help with daily forecasting. • Especially important when reservoir is getting close to spill, but reservoir operations are planned to avoid/reduce spill. • Long term reservoir plans. • Help with long lead peak flow forecasts and river flows (e.g. CROS). • Would especially like general plans for early season (~Jan-Mar) leading into runoff season. • Updated reservoir information. • Latest storage and spillway curves. • Critical elevations. • Information that would help refine our model rules.

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