RIO HONDO BLE FINDINGS MEETING July 26 & 27, 2017 WHAT IS RISK - - PowerPoint PPT Presentation

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Sep 23, 2022 592 likes •892 views

RIO HONDO BLE FINDINGS MEETING July 26 & 27, 2017 WHAT IS RISK MAP? Mapping Identification of areas of natural hazard risk Assessment Review and analysis of hazard areas Planning Mitigation activities to reduce risk

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RIO HONDO BLE FINDINGS MEETING

July 26 & 27, 2017

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WHAT IS RISK MAP?

 Mapping – Identification of areas of natural hazard risk  Assessment – Review and analysis of hazard areas  Planning – Mitigation activities to reduce risk

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WHAT IS BASE LEVEL ENGINEERING

 Cursory engineering analysis to provide predicted areas of flood risk.  Measuring stick to allow FEMA to assess its current flood maps.  Flood risk data that provides a platform for broader risk communications.  Engineering modeling that may be used and leveraged by local communities to review effect of development in and around the floodplain.

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WHAT IS BASE LEVEL ENGINEERING

Minimum Data Purchase

Hydraulic Modeling (10%, 4%,

2%, 1%, 1%+, 1%-, and 0.2%)

10%, 1% and 0.2% Floodplains
1% and 0.2% Water Surface Grids
1% and 0.2% Flood Depth Grids
Hazus prepared with Depth Grids

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BASE LEVEL ENGINEERING IS A MINDSET

 Base Level Engineering results are available through the Estimated BFE Viewer.

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MINDSET

Scalable models allow communities to maintain the inventory.

Base Level Engineering Limited Detail Study Detailed Study Detailed w/ Floodway

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Floodplains

10%, 1% and 0.2% Floodplains

What is the expected flood extent during these storm frequencies? Raster Datasets

1% and 0.2% Water

Surface Elevation Grids

1% and 0.2% Estimated

Flood Depth Grids

What is the variability

f flood risk within the

floodplain?

Flood Risk Assessment

Hazus Assessment

What is the vulnerability or economic loss potential within the watershed?

FLOOD RISK PRODUCTS & DATASETS

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PROVIDING BASE FLOOD ELEVATIONS

 This information can be adopted by locals without any FIRM  The BLE results may be used in areas where no flood hazard information is shown on your FIRM  Where BLE is similar OR more conservative it may be used to provide Estimated Base Flood Elevations to residents  Where BLE is smaller than current FIRM, BLE should NOT be used to provide Estimated Base Flood Elevations  Data may be used for local planning purposes  Local community letter of adoption of Estimated BFE is needed to submit with LOMAs.

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ESTIMATED BFE VIEWER

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http://apps.femadata.com/estbfe

ESTIMATED BFEVIEWER

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http://apps.femadata.com/estbfe

ESTIMATED BFEVIEWER

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http://apps.femadata.com/estbfe

ESTIMATED BFEVIEWER

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http://apps.femadata.com/estbfe

ESTIMATED BFE VIEWER

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ESTIMATED BFEVIEWER



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ESTIMATED BFE VIEWER

http://apps.femadata.com/estbfe

K:/R06/OK/POTTAWATOMIE/16-06-597S /Hydraulics/2186721/SaltCreek

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RIO HONDO LIDAR PRODUCTS

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LIDAR DERIVED PRODUCTS

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RIO HONDO LIDAR PRODUCTS

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SINKHOLE MAPPING

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PLAYA MAPPING

A similar technique was used to map playas – here color-ramped by depth.

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REGION VI BLEVISION

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BASE LEVEL ENGINEERING UNLOCKING THE POWER OF THE BLE DATASETS

 Public outreach and communication  Updating the local mitigation plan  Taking mitigation action  Community planning  Response and recovery

▸The REAL power comes from combining with

local data – parcels, buildings, and critical facilities!

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BLE & LIDAR PRODUCTS COMBINED

 BFE Viewer for Approximate A zones  Footprints + Assessor data  Target Mitigation actions to reduce wildfire risk  Identify high risk areas for detail studies  Critical facilities & local institutions  Building footprints  Building footprints

Reducing Risk Local Info BLE GIS/ Lidar

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NM RGIS

 Lidar & Products

 Download from RGIS Data Portal

 Animas and Rio Hondo Digital Elevation Model (DEM)  Animas and Rio Hondo Hillshade

 Provide a hard drive and we’ll copy the data

 Lidar Point Clouds

 .las files

 Lidar is a huge, huge data set

 Rio Hondo 2.56 TB  Curry/Roosevelt 1.98 TB  Animas 716 GB  Santa Fe County 2.68 TB

 http://rgis.unm.edu/

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NM RGIS RISK MAP PRODUCTS

 Rio Hondo

 Elevation Products

 DEM  Shaded Relief  Slope & Aspect

 Defensible Space  Overall Perimeter –WUI & Defensible Space  Building Footprints  Impervious Surface  Reduced Fuel Zone  Sinkholes

FEMA Risk Map

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COMMUNITY INTERACTIVE MAPS

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QUESTIONS

Shawn L. Penman, PhD, CFM, GISP spenman@edac.unm.edu (505) 277-3622 ext 227