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Ataul Hannan, P.E., CFM Harris County Flood Control District Ataul Hannan, P.E., CFM Harris County Flood Control District National Flood Workshop Houston,

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Presentation on theme: "Ataul Hannan, P.E., CFM Harris County Flood Control District Ataul Hannan, P.E., CFM Harris County Flood Control District National Flood Workshop Houston,"— Presentation transcript:

1 Ataul Hannan, P.E., CFM Harris County Flood Control District Ataul Hannan, P.E., CFM Harris County Flood Control District National Flood Workshop Houston, TX, October 24-26, 2010 Harris County Flood Control District Model and Map Maintenance Program

2 Overview Harris County OverviewHarris County Overview Model ManagementModel Management Mapping Activity Statement No. 14 (HCFCD Agreement with FEMA)Mapping Activity Statement No. 14 (HCFCD Agreement with FEMA) LOMR DelegationLOMR Delegation

3 Harris County

4 Tropical Storm Allison

5 HCFCD becomes Cooperative Technical Partner (CTP) – 2000HCFCD becomes Cooperative Technical Partner (CTP) – 2000 Tropical Storm Allison Recovery Project (TSARP) – June 18, 2007Tropical Storm Allison Recovery Project (TSARP) – June 18, 2007 New LiDAR topo, new models and mapsNew LiDAR topo, new models and maps Total Project Cost = $32 MillionTotal Project Cost = $32 Million ($16M – HCFCD and $16M – FEMA)($16M – HCFCD and $16M – FEMA) StatsStats 144 FIRM panels144 FIRM panels 1300 miles studied1300 miles studied 22 watersheds22 watersheds HCFCD / FEMA CTP HISTORY

6 LiDAR Elevation

7 The Scale of Our Work Identified Flood Plains

8 MODEL MANAGEMENT

9 Why Model Management? Protect the investmentProtect the investment Current and accurate Information to local community & FEMACurrent and accurate Information to local community & FEMA

10 Continually manage and maintain the integrity of the effective model setContinually manage and maintain the integrity of the effective model set Foster a partnership between HCFCD and the Floodplain AdministratorsFoster a partnership between HCFCD and the Floodplain Administrators Facilitate and expedite model and data distributionFacilitate and expedite model and data distribution Coordinate concurrent development activities in watershedsCoordinate concurrent development activities in watersheds Model Management Objectives

11 Standards

12 Purpose Maintain the integrity of the models and supporting dataMaintain the integrity of the models and supporting data Ensure model modifications are made in a consistent manor so others can easily understand changesEnsure model modifications are made in a consistent manor so others can easily understand changes Why Do We Need Standards?

13 Model & Map Standards Channel Cross Sections tied to LiDAR HEC-HMS HEC-RAS

14 Standards

15 Model Version (HEC-HMS/HEC-RAS)Model Version (HEC-HMS/HEC-RAS) –HEC-HMS (v3.3.0) –HEC-RAS (v3.0.1) No model truncation (Section 4.3.3)No model truncation (Section 4.3.3) Use current model set (Section 5.2)Use current model set (Section 5.2) Tracking number (Section 5.2)Tracking number (Section 5.2) New/modified cross sections (Section 3.4.4)New/modified cross sections (Section 3.4.4) Nomenclature change (Section 3.2)Nomenclature change (Section 3.2) Modeling Standards Highlights

16 Model Management Watershed Wide Updates Continuous Updates M3 is the Support System Model Management How ?

17 Challenges: –Many LOMRs throughout Harris County –Multiple LOMR projects – one stream Continuous Updates Objective: Continually update the models and associated data sets due to changes in Floodplain and Floodways which require a LOMR

18 Mapping Activity Statement (MAS) –Continuous Update Process (MAS No. 14 –HCFCD Custodian models Our Agreement with FEMA

19 LOMR Continuous Update

20 HCFCD and Local Community Agreement and Partnership Continuous Update

21 Local Floodplain Administrators 35 Different Floodplain Administrators within Harris County35 Different Floodplain Administrators within Harris County Our Agreement with FPM (Memorandum of Understanding) –mailed on Dec 17, 2009Our Agreement with FPM (Memorandum of Understanding) –mailed on Dec 17, 2009 Cursory reviewCursory review Follow standardsFollow standards Technical resource for communitiesTechnical resource for communities Yearly workshopsYearly workshops Continuous Update

22 Proposed LOMR Local Review FEMA Approval Update Master Model Set Model to FEMA Continuous Update

23 HCFCD Responsibilities:HCFCD Responsibilities: Provide current/accurate models from webProvide current/accurate models from web Provide technical resourceProvide technical resource Provide training (yearly workshops)Provide training (yearly workshops) Local Community Responsibilities:Local Community Responsibilities: Obtain models from HCFCDObtain models from HCFCD Follow StandardsFollow Standards Provide HCFCD a copy of map revision submittal for review prior to signing Community Acknowledgement FormProvide HCFCD a copy of map revision submittal for review prior to signing Community Acknowledgement Form Memorandum of Understanding

24 What is M3?

25 Model and Map Management (M3) System Distribute models and supporting dataDistribute models and supporting data Track changes to modelsTrack changes to models Facilitate communication between projectsFacilitate communication between projects Assist HCFCD in the review processAssist HCFCD in the review process M3 Functionality

26 M3 Workbench

27 Benefits Receive the most current and accurate modelReceive the most current and accurate model Current model versionsCurrent model versions Modeling standardsModeling standards Notifications of model changesNotifications of model changes M3 Model Check-Out

28 Average 30 to 40 LOMRs per year Notifications

29 Various stages throughout the LOMR or CLOMR acceptance processVarious stages throughout the LOMR or CLOMR acceptance process Regular updates of model and supporting dataRegular updates of model and supporting data Large projects in the same locationLarge projects in the same location Watershed-wide public projectsWatershed-wide public projects Information will be available both on the website and through Information will be available both on the website and through Notifications

30 M3 Checker

31 LOMR DELEGATION LOMRCLOMR

32 Continuous Updates with LOMR Delegation Proposed LOMR Local Review FEMA Approval Update Master Model Set Model to FEMA LOMR Delegation

33 Advantages Most current and accurate models and supporting data come directly from HCFCD – one sourceMost current and accurate models and supporting data come directly from HCFCD – one source HCFCD, FEMA and local communities are all in the same datumHCFCD, FEMA and local communities are all in the same datum Knowledge of local area and issuesKnowledge of local area and issues Accessible during review processAccessible during review process Technical resourceTechnical resource Cut down review timeCut down review time

34 LOMR DELEGATION

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38 Reduce the risk and rediscover the beauty Reduce the risk and rediscover the beauty QUESTIONS????


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