HomeОбразованиеRelated VideosMore From: Marcos Luna

How to Model Coastal Flooding in ArcGIS

131 ratings | 23272 views
Uses a raster elevation dataset for Marblehead, MA and models flooded coastal areas based on rise in mean sea level. Uses Map Algebra to identify flooded cells, Reclassify to isolate flooded cells, and converts flooded cell raster to a polygon to select only areas hydrologically connected to the coast
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Text Comments (25)
Melissa Petersen (2 months ago)
Thank you for this video! Has helped me a bunch with my MSc. Quick question: How did you change your elevation values from -0.286762 to 35.2728 in your previous video titled Creating a Raster Elevation Map Pt 4 of 4 to the elevation values that you have here (0 to 35)?
Kishan Kumar (3 months ago)
can we do the same for tsunami
hafez ahmad (6 months ago)
Nikscrits (11 months ago)
Wow thank you so much - you’re a life saver!!! This video has been a fundamental part of completing my masters GIS coursework! THANK YOU!!
Katie McNamara (11 months ago)
This video really helped me on a GIS coursework project for my MSc! Thank you so much :)
Speedin Hawk (1 year ago)
URGENT PLEASE HELP - Can I use LiDAR data to do this? Or is there a way to convert LiDAR to Raster? I really badly need raster elevation data of UK!
Wilson Lopez (1 year ago)
Great explanation, thank you for the video.
JOY (1 year ago)
Hi I wanna ask if i wanna analyse flooding of a river, is it the same strategy? Cuz I am not from engineering background so I have no idea about how to analyse flooding
nico wantona prabowo (1 year ago)
I'm sorry, but where do you know the height of affected area is 15 feet? Where to find or calculate that data?
Speedin Hawk (1 year ago)
I know it's been long since you asked, but it's not calculated, per se. It's a value of a scenario. For example, if an article says that Florida may expect 0.5 meters of sea level rise in a given amount of time, that's where the 0.5 meters comes from! :)
Dickson Anderson (1 year ago)
Thank you Mr
Parisa Bozorgi (1 year ago)
Where I can find this dataset?
Jenn H (2 years ago)
Thanks for this. What about intertidal areas that have an elevation above 0m. Would you just classify that area in with 0 mean sea level?
gem Barry (2 years ago)
Excellent video, It was clear, easy to follow, not to long and very informative. I really learnt a lot
Dana Wacker (3 years ago)
You are a terrific teacher. I really appreciate that you describe things in plain english as well as technical jargon. I'm studying GIS online through my university and it's caused me so much stress because they just don't make videos like these. Thank you so so much for contributing this to the online community, it's very much appreciated by students everywhere!
Kevin Ives (3 years ago)
Hi, your tutorial is awesome, and it is a real help! Have you got a previous video explaining the primary processing (setting up the boundary around the community)? Thanks Kevin
Simon de Vries (3 years ago)
This video is extremely helpful for my university work. Thank you very much, great tutorial :D
Nawaf Almutairi (3 years ago)
Don't worry I get it, I missed some step. Thank you
Nawaf Almutairi (3 years ago)
What should I do if I want delete area not connected to sea. I need it to show overlay scenarios.
Dante Torio (2 years ago)
use high resolution coastline data and do a select by location, e.g., select polygons that touch the coastline
Nawaf Almutairi (3 years ago)
unit cell in my DEM is 0.000277. 0.00027 and there isn't unit in linear unit. Do you know why that happened?
Marcos Luna (3 years ago)
It is likely that the DEM is unprojected - using decimal degrees as the coordinate system. DEMs should be in projected coordinate systems, such as UTM.
shakti gurung (3 years ago)
thanks man. It helped me a lot.
Nawaf Almutairi (3 years ago)
Great job. I see you use only DEM data, is there any other methodology? coastline is dynamic and the uncertainty come when you locate wrongly. It differ in low tide than high tide!
Marcos Luna (3 years ago)
+Nawaf Almutairi The analyses that I've read in the scholarly literature always use some form of raster analysis with a DEM (i.e. "bath tub model"). LIDAR data is increasingly used. Check out Climate Central's Surging Seas http://sealevel.climatecentral.org/ and specifically the section on Research to see a the methodology used there.

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