high water mark training - ncgs.state.nc.us
TRANSCRIPT
![Page 1: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/1.jpg)
North Carolina Emergency Management
High Water Mark Training
Initiative to Record Flood Elevations
April 24, 2018
![Page 2: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/2.jpg)
North Carolina Emergency Management
High Water Mark (HWM) Training • Benefits of high water marks
• Setting and documenting marks •
• High water mark field kits •
• NC HWM photo submittal phone application
![Page 3: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/3.jpg)
North Carolina Emergency Management
Locating Marks
• The need for speed – marks can be highly perishable
• Rain can quickly degrade/destroy marks
• Important to locate and f lag ASAP after a f lood
![Page 4: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/4.jpg)
North Carolina Emergency Management
Benefits of a High Water Mark (HWM)
• Are the best resource to document a flood event
• HWM information can be used in a variety of mitigation
and planning efforts
• Calibrate models
• Supports FIMAN (Flood Inundation Mapping Alert
Network) and FRIS (Flood Risk Information System)
• Public safety
![Page 5: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/5.jpg)
North Carolina Emergency Management
Benefits of a High Water Mark (HWM)
![Page 6: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/6.jpg)
North Carolina Emergency Management
Benefits of a High Water Mark (HWM)
![Page 7: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/7.jpg)
North Carolina Emergency Management
Flood Risk Information
System (FRIS)
![Page 8: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/8.jpg)
![Page 9: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/9.jpg)
North Carolina Emergency Management
Flood Inundation Mapping Alert Network (FIMAN)
![Page 10: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/10.jpg)
Home Screen / Current Severity
![Page 11: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/11.jpg)
North Carolina Emergency Management
High Water Marks • Locate marks
• Flag the marks with durable markers
• Document the f lagged marks
• An elevation will need to be determined for the marks later
for them to be useful.
Photo credit: United States Geological Survey (USGS) Photo credit: USGS
![Page 12: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/12.jpg)
North Carolina Emergency Management
Types of Marks
• Mud lines
• Seed Lines
• Debris lines on the ground
• Debris snags in branches
![Page 13: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/13.jpg)
North Carolina Emergency Management
Mud Lines
Photos credit: USGS
![Page 14: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/14.jpg)
North Carolina Emergency Management
Seed Lines
Photos credit: USGS
![Page 15: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/15.jpg)
North Carolina Emergency Management
Debris lines on the ground
Photos credit: USGS
![Page 16: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/16.jpg)
North Carolina Emergency Management
Debris snags in branches
Photos credit: USGS
![Page 17: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/17.jpg)
North Carolina Emergency Management
You Found a HWM
Now What?
![Page 18: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/18.jpg)
North Carolina Emergency Management
Flagging a HWM
• Use a durable marker to note water surface – Nail/cap
– HWM washer
– Surveyor’s tape
– Paint mark
– Wooden stake
– Chiseled square or line in concrete/rock
• IMPORTANT – make sure you get permission of
property owners before f lagging marks!
![Page 19: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/19.jpg)
North Carolina Emergency Management
Basic HWM Field Kit • Nails
• High Water Mark (HWM) plastic washers
• Paint crayon/ spray paint
• Surveying f lagging tape – high vis.
![Page 20: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/20.jpg)
North Carolina Emergency Management
Marking Examples
![Page 21: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/21.jpg)
North Carolina Emergency Management
Photos credit: USGS
![Page 22: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/22.jpg)
North Carolina Emergency Management
Chiseled square on sidewalk
Painted Line on Boat Ramp
Photos credit: USGS
![Page 23: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/23.jpg)
North Carolina Emergency Management
Photos credit: USGS
![Page 24: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/24.jpg)
North Carolina Emergency Management
Some Tips
• Always look a little higher
– Make sure you are not:
– Marking a lower, secondary
peak which is common
– Setting multiple marks can be
advantageous, also try to get them
on both sides of the channel
– A HWM should represent the water
surface in relatively still water
Look for areas off the main channel,
where water would likely be pooled and
not piling up due to swift current.
Photo courtesy of Arizona Geologic Hazards Center
![Page 25: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/25.jpg)
North Carolina Emergency Management
If some time has elapsed between flood and a HWM search, look for them in sheltered areas. Note for a mark in a structure, transfer the mark height outside with a leveling device – that way if the owner cleans the structure the mark height is preserved.
Photos credit: USGS
![Page 26: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/26.jpg)
North Carolina Emergency Management
Be Careful at Boat Ramps
Photo credit: USGS
![Page 27: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/27.jpg)
North Carolina Emergency Management
Marks can be Highly Perishable
![Page 28: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/28.jpg)
North Carolina Emergency Management
HWM Documentation • Type of mark – e.g. mud line, seed line • Location of mark – lat/long • Type of f lagging used e.g. nail through bottle cap
• Quality of the mark
• Miscellaneous important notes – Landowner contact info
– Logistics/safety information
• Noting mark location on a map/site sketch is helpful
• Date stamped digital photo of mark
![Page 29: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/29.jpg)
High Water Mark (HWM) Photo Application http://ncem-gis.maps.arcgis.com/apps/GeoForm/index.html?appid=e4b0124896264c37aa7e235de3d89809
![Page 30: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/30.jpg)
North Carolina Emergency Management
HWM Web Viewer
![Page 31: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/31.jpg)
North Carolina Emergency Management
HWM Photo
![Page 32: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/32.jpg)
North Carolina Emergency Management
High Water Mark (HWM) Photo Application
• http://ncem-gis.maps.arcgis.com/apps/GeoForm/index.html?appid=e4b0124896264c37aa7e235de3d89809
Or
www.arcgis.com
Search for “NCEM, High Water Marks”
To view HWM submissions: http://arcg.is/10vrKm
![Page 33: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/33.jpg)
North Carolina Emergency Management
Best Practices
• Safety first
– Think ahead
– Visualize the flood
– Be aware of hazards
• Obtain permission (private property)
• Be aware of local effects (pile up)
• Bushes can get bent down during a flood and bend back up after the flood, creating a false high water surface
• Safety First
![Page 34: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/34.jpg)
North Carolina Emergency Management
HWM Examples
![Page 35: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/35.jpg)
North Carolina Emergency Management
HWM Examples
![Page 36: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/36.jpg)
North Carolina Emergency Management
HWM Examples
![Page 37: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/37.jpg)
North Carolina Emergency Management
HWM Examples
![Page 38: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/38.jpg)
North Carolina Emergency Management
HWM Examples
![Page 39: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/39.jpg)
North Carolina Emergency Management
Jacksonville Gage
![Page 40: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/40.jpg)
North Carolina Emergency Management
![Page 41: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/41.jpg)
HWM Collection-
Julia’s Impacts in Windsor
![Page 42: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/42.jpg)
![Page 43: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/43.jpg)
![Page 44: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/44.jpg)
Windsor Flooding 9/22/16 - Morning
Windsor – Sept 2016
![Page 45: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/45.jpg)
Hurricane Matthew-Flood Origin Assessment Princeville
![Page 46: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/46.jpg)
North Carolina Emergency Management
Comparing LiDAR based flood mapping to surveyed edge of water
![Page 47: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/47.jpg)
North Carolina Emergency Management
FIMAN Library Comparison to HWM-Greenville
![Page 48: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/48.jpg)
![Page 49: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/49.jpg)
![Page 50: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/50.jpg)
North Carolina Emergency Management
![Page 51: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/51.jpg)
Kinston
![Page 52: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/52.jpg)
Kinston
![Page 53: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/53.jpg)
North Carolina Emergency Management
![Page 54: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/54.jpg)
North Carolina Emergency Management
ReadyNC Application
![Page 55: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/55.jpg)
![Page 56: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/56.jpg)
North Carolina Emergency Management
Where to Document High Water Marks
![Page 57: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/57.jpg)
Access to Restricted Areas
• Provide the NCSS office with a list of names that will be participating in marking and documenting HWMs
• North Carolina Emergency Management will provide the information to the local officials
– Safety First
– ReadyNC.org
![Page 58: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/58.jpg)
North Carolina Emergency Management
High Water Mark Video
• https://www.youtube.com/watch?v=BFHOVrQj7gE
![Page 59: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/59.jpg)
North Carolina Emergency Management
Flood Inundation Mapping Alert Network (FIMAN)
![Page 60: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/60.jpg)
Home Screen / Current Severity
![Page 61: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/61.jpg)
North Carolina Emergency Management
Weather Radar Loop
![Page 62: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/62.jpg)
North Carolina Emergency Management
Search by Type, Owner, Etc
![Page 63: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/63.jpg)
North Carolina Emergency Management
Search by Name, Keyword
![Page 64: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/64.jpg)
North Carolina Emergency Management
Search Using Your Location
![Page 65: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/65.jpg)
North Carolina Emergency Management
Gage View - Dashboard Concept
• Three Tabs – Current: Provides most recent inundation extent
– Scenario: Planning tool for visualization and impact
– Forecast: Shows timeline using NWS forecast data
• Info Widgets – Interactive for rainfall, stage, flow, forecast, impacts
![Page 66: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/66.jpg)
North Carolina Emergency Management
Current Inundation Level and Map
![Page 67: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/67.jpg)
North Carolina Emergency Management
Gage Stage Charts + Forecast
![Page 68: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/68.jpg)
North Carolina Emergency Management
Real Time Flood Impacts
![Page 69: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/69.jpg)
North Carolina Emergency Management
Real Time Email Alerts
![Page 70: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/70.jpg)
Flood Scenario Mode
![Page 71: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/71.jpg)
Coastal Libraries
![Page 72: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/72.jpg)
North Carolina Emergency Management
FIMAN Sylva Area
![Page 73: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/73.jpg)
North Carolina Emergency Management
Ryan Creek
![Page 74: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/74.jpg)
North Carolina Emergency Management
Cartoogechaye Creek near Franklin
![Page 75: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/75.jpg)
North Carolina Emergency Management
High Water Mark Initiative
![Page 76: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/76.jpg)
North Carolina Emergency Management
Certified Floodplain Surveyor (CFS) Program
• https://www.ncsurveyors.com/education/cfs_program
![Page 77: High Water Mark Training - ncgs.state.nc.us](https://reader033.vdocuments.net/reader033/viewer/2022060415/62953955e944980e7d231097/html5/thumbnails/77.jpg)
North Carolina Emergency Management
Questions? Gary Thompson, PLS NC Geodetic Survey 4105 Reedy Creek Road Raleigh, NC 27607 Main office: 919-733-3836 Direct line: 919-948-7844