Ataul Hannan, P.E., CFMHarris County Flood Control District

Ataul Hannan, P.E., CFMHarris County Flood Control District

National Flood Workshop Houston, TX, October 24-26, 2010

National Flood Workshop Houston, TX, October 24-26, 2010

Real Time Flood Event Modeling Program

Real Time Flood Event Modeling Program

Harris CountyHarris County

Elevation ContourElevation Contour

Our Soaked HistoryOur Soaked History

Tropical Storm AllisonTropical Storm Allison

Floodplain MapFloodplain Map

• To create a planning and information To create a planning and information resource for:resource for:– Better understanding the ability of current Better understanding the ability of current

models to reflect observed flooding models to reflect observed flooding conditionsconditions

– Providing real-time and post-event Providing real-time and post-event evaluations of the effectiveness of county evaluations of the effectiveness of county flood management facilitiesflood management facilities

– Supporting existing Flood ALERT efforts Supporting existing Flood ALERT efforts staffed by HCFCD personnelstaffed by HCFCD personnel

• To create a planning and information To create a planning and information resource for:resource for:– Better understanding the ability of current Better understanding the ability of current

models to reflect observed flooding models to reflect observed flooding conditionsconditions

– Providing real-time and post-event Providing real-time and post-event evaluations of the effectiveness of county evaluations of the effectiveness of county flood management facilitiesflood management facilities

– Supporting existing Flood ALERT efforts Supporting existing Flood ALERT efforts staffed by HCFCD personnelstaffed by HCFCD personnel

PurposePurpose

• Web-based intranet toolWeb-based intranet tool• Utilize existing HEC-HMS and HEC-RAS Utilize existing HEC-HMS and HEC-RAS

models developed for Harris Countymodels developed for Harris County• Link programs together to ingest rainfall Link programs together to ingest rainfall

and produce a real-time flood inundation and produce a real-time flood inundation mapmap

• Web-based intranet toolWeb-based intranet tool• Utilize existing HEC-HMS and HEC-RAS Utilize existing HEC-HMS and HEC-RAS

models developed for Harris Countymodels developed for Harris County• Link programs together to ingest rainfall Link programs together to ingest rainfall

and produce a real-time flood inundation and produce a real-time flood inundation mapmap

ObjectivesObjectives

• Buffalo Bayou and White Oak Bayou Watersheds (unsteady flow network)

• Buffalo Bayou and White Oak Bayou Watersheds (unsteady flow network)

Pilot StudyPilot Study

Link 1

External ProcessingNatural

Link

Link 2

Link 3

Timing AspectsTiming Aspects• Rainfall Data = 15 minutes Rainfall Data = 15 minutes

(continuous feed)(continuous feed)• Computation Time = 11 to 14 Computation Time = 11 to 14

minutesminutes• Antecedant Rainfall = 10 daysAntecedant Rainfall = 10 days

FEMPFEMP

Parent ProgramParent Program

Web ToolWeb Tool

Web ToolWeb Tool

Web ToolWeb Tool

Web ToolWeb Tool

Web ToolWeb Tool

Web ToolWeb Tool

TestTest

TestTest

TestTest

TestTest

TestTest

Reduce the risk and rediscover the beautyReduce the risk and rediscover the beauty

QUESTIONS????