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FEDERAL EMERGENCY MANAGEMENT AGENCY AUTOMATED HYDROLOGY AND HYDRAULICS John Liou FEMA Region VIII.

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Presentation on theme: "FEDERAL EMERGENCY MANAGEMENT AGENCY AUTOMATED HYDROLOGY AND HYDRAULICS John Liou FEMA Region VIII."— Presentation transcript:

1 FEDERAL EMERGENCY MANAGEMENT AGENCY AUTOMATED HYDROLOGY AND HYDRAULICS John Liou FEMA Region VIII

2 FEDERAL EMERGENCY MANAGEMENT AGENCY Automated H&H Requirements Existing, advanced Geographic Information System (GIS)Existing, advanced Geographic Information System (GIS) Recent aerial surveys in digital formatRecent aerial surveys in digital format Good digital land use informationGood digital land use information Fairly clear watershed boundariesFairly clear watershed boundaries Major restudy needsMajor restudy needs

3 FEDERAL EMERGENCY MANAGEMENT AGENCY Advantages of Automated H&H Economies of scale realized with large drainage basinsEconomies of scale realized with large drainage basins Enhanced ability to perform “what-if” scenariosEnhanced ability to perform “what-if” scenarios Easily integrates with GIS for house-by-house flood zone warnings, targeted buyouts, or other plansEasily integrates with GIS for house-by-house flood zone warnings, targeted buyouts, or other plans

4 FEDERAL EMERGENCY MANAGEMENT AGENCY Advantages of Automated H&H (Continued) More readily integrates with FEMA digital mapping standardsMore readily integrates with FEMA digital mapping standards May ultimately lead to real-time forecastingMay ultimately lead to real-time forecasting

5 FEDERAL EMERGENCY MANAGEMENT AGENCY Disadvantages of Automated H&H Quality of topographic input data and land use dataQuality of topographic input data and land use data Integration of field-surveyed cross sections with DEM dataIntegration of field-surveyed cross sections with DEM data Time required for pre-processing and mappingTime required for pre-processing and mapping Layer controlLayer control ExpenseExpense

6 FEDERAL EMERGENCY MANAGEMENT AGENCY Automated Hydrology GIS allows for automatic determination of watershed characteristics needed in modelingGIS allows for automatic determination of watershed characteristics needed in modeling Land and channel slopes, surface flow connectivity, and watershed boundaries can be determined from DEM, DTM, or TIN dataLand and channel slopes, surface flow connectivity, and watershed boundaries can be determined from DEM, DTM, or TIN data Land use or soil characteristics can be determined from other GIS-based dataLand use or soil characteristics can be determined from other GIS-based data

7 Overview of Automated H&H Hydrologic Modeling Hydraulic Modeling Floodplain Mapping Input data: Cross sections “n” values Input data: DEMs, Soils Streams Land use

8 Automated Hydrology

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14 FEDERAL EMERGENCY MANAGEMENT AGENCY Frequently Used Automated Hydrology Programs HEC Pre-Pro, University of TX (HEC-HMS)HEC Pre-Pro, University of TX (HEC-HMS) BASINS, Environmental Protection Agency (HSPF)BASINS, Environmental Protection Agency (HSPF) GIS Hydro, University of MD (TR-20, USGS Regr.)GIS Hydro, University of MD (TR-20, USGS Regr.) WMS, Brigham Young University (TR-20, HEC- HMS, HEC-1, TR-55, Rational Method, USGS Regr.)WMS, Brigham Young University (TR-20, HEC- HMS, HEC-1, TR-55, Rational Method, USGS Regr.) MMS, USGS (PRMS)MMS, USGS (PRMS)

15 Automated H&H Watershed Modeling System (WMS) picture courtesy of BOSS International. Used by permission.

16 FEDERAL EMERGENCY MANAGEMENT AGENCY Available Automated H&H Packages Watershed Modeling System (WMS)Watershed Modeling System (WMS) River Modeling System (RMS)River Modeling System (RMS) RiverCADRiverCAD Arc-SWMMArc-SWMM MIKE11 GISMIKE11 GIS HEC GeoHMSHEC GeoHMS GIS WeaselGIS Weasel

17 FEDERAL EMERGENCY MANAGEMENT AGENCY Available Automated H&H Packages Watershed Information System (WISE)Watershed Information System (WISE) Surface Water Modeling System (SMS)Surface Water Modeling System (SMS) HydroCADHydroCAD PC SWMMPC SWMM RiverToolsRiverTools BASINSBASINS HEC-RAS/12DHEC-RAS/12D

18 FEDERAL EMERGENCY MANAGEMENT AGENCY Online Information on Automated H&H FEMA Flood Hazard Mapping Web SiteFEMA Flood Hazard Mapping Web Site –http://www.fema.gov/mit/tsd/mm_ahh1.htm BOSS International WMS Web SiteBOSS International WMS Web Site –http://www.bossintl.com/html/wms_overview.html BOSS International RMS Web SiteBOSS International RMS Web Site –http://www.bossintl.com/html/rms_overview.html Note: This does not constitute an endorsement of any specific product by FEMA.

19 FEDERAL EMERGENCY MANAGEMENT AGENCY Automated Floodplain Mapping Applies automated H&H model resultsApplies automated H&H model results Automates floodplain delineationsAutomates floodplain delineations Provides for rapid map updatingProvides for rapid map updating Georeferences floodplain boundaries and model parametersGeoreferences floodplain boundaries and model parameters

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