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MISSOURI RIVER – HEC RAS MODEL

MISSOURI RIVER – HEC RAS MODEL. 1500 CROSS SECTIONS [XS] 121 STORAGE AREAS [SA] 160 LATERAL STRUCTURES [ LS] 50 STORAGE AREA CONNECTIONS [SAC] OVER 2000 CROSS SECTION LEVEE PT’S 1 NAVIGATIONAL DAM AND 2 INLINE WEIRS

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MISSOURI RIVER – HEC RAS MODEL

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  1. MISSOURI RIVER – HEC RAS MODEL 1500 CROSS SECTIONS [XS] 121 STORAGE AREAS [SA] 160 LATERAL STRUCTURES [LS] 50 STORAGE AREA CONNECTIONS [SAC] OVER 2000 CROSS SECTION LEVEE PT’S 1 NAVIGATIONAL DAM AND 2 INLINE WEIRS 5 RIVERS DYNAMICALLY MODELED 50 LATERAL INFLOWS MBRFC – Lori Schultz

  2. XS WITH BOTH LS AND XS PT LEVEE LS & SA BEGINS HERE XS PT LEVEE

  3. LATERAL STRUCTURE METHOD OF LEVEE MODELING LS 550.011 FLOWS TO SA L-575

  4. GIS CREATION OF OVERBANK SA, LS, AND SAC SA HOLT 10 LS 503.011 SAC 493.65L

  5. WHAT A DIFFERENCE A BREACH MAKES

  6. MODEL ISSUES, CAVEATS, AND MORE ISSUES… • UNGAGED LOCALS ARE 18% OF MISSOURI RIVER FLOWS • CORRECT RATINGS? EVEN GAGED LATERAL INFLOWS CAN BE WRONG • LIMITED ARCHIVE DATA AND DETAIL TO COVER RANGE OF EVENTS • REAL WORLD DETAIL NOT AVAILABLE: sandbagging, local farmer levees, ground water upwelling behind LS’s… • PUMPING AND MANUALLY OPERATED SLUICE GATES HARD TO QUANTIFY • LS’S/SAC’S CAN ONLY BE BREACHED ONE TIME AT ONE PLACE

  7. DISTRESS POINTS: BREACHES AND OVERTOPS SO MANY BREACHES, SO LITTLE FLEXABILITY

  8. OPERATIONAL ISSUES, CAVEATS, AND MORE ISSUES IT’S ALIVE !! • CHPS-RAS ADAPTER IS ONLY AVAILABLE FOR RAS 4.1, RAS 4.2 IS NEEDED TO • BREACH SAC’S • NO PUMPS IN CHPS-RAS ADAPTER • RAS IS MORE SENSITIVE • TO BAD INPUT THAN • THE HYDROLOGIC MODEL • GETTING DETAILED INFO • FROM FIELD

  9. CHPS OPERATIONAL SOFTWARE, MOD WINDOW GIFTS FORECAST SOFTWARE

  10. THANK YOU • DON MEIER – KC CORPS • GARY BRUNNER, CAMERON ACKERMAN, STEVE PIPER – HEC • SCOTT WATSON & KRIS LANDER – NWS, FOR GIS SUPPORT • MARK ZIEMER – NCRFC, NWS

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