Flood Mapping

GarethRiley

Hi,

Can anyone suggest a method or point me in the direction of a guide to creating a flood map? I have created them in the past but it's been a while.

I know I need a DTM, and I think I had to look at flow direction and accumulation? I'm not sure if this is what I should be looking at?

http://www.arcgis.com/home/item.html?id=bebbfc44c1724d9da0d41039cf4706df‌

Thanks

wusirui

Hello

I suggest that you could search some scientific papers and decide one direction that you want to work with. It is hard to say how does flood map can be defined. That is, You need to know what you need and how to get it.  You could search related scientific papers in Google scholar and may get some ideas about how you can get your flood maps. In my opinion, Flood map refers to many directions and points, such as how we can define Flood map? how flood map can be mapped and how we can measure this flooding. So, just get this macro principle and then you will know what kinds of process you need to work with.

Of course DEM data, flow direction and accumulation and stream network should be very helpful. Also, there were many tiny but important things during your processing, For example, How can you define your accumulation threshold and why this is important?

So, read more papers and then you could focus on your technique part.