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

XS WITH BOTH LS AND XS PT LEVEE

XS PT LEVEE

LS & SA BEGINS HERE

LATERAL STRUCTURE METHOD OF LEVEE MODELING

LS 550.011 FLOWS TO SA L-575

GIS CREATION OF OVERBANK SA, LS, AND SAC

LS 503.011

SA HOLT 10

SAC 493.65L

WHAT A DIFFERENCE A BREACH MAKES

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

DISTRESS POINTS: BREACHES AND OVERTOPS

SO MANY BREACHES, SO LITTLE FLEXABILITY

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

GIFTS FORECAST SOFTWARE

CHPS OPERATIONAL SOFTWARE, MOD WINDOW

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