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Isochrone maps - are they widely available?

by WaterEngineer
Tags: isochrone, maps, widely
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WaterEngineer
#1
Dec19-11, 08:10 AM
P: 4
I need isochrone maps for a water contamination analysis. Does anyone know if these are widely available? A quick google search hasn't given me much, just information on what they are.

I could use the rational method to calculate the runoff instead, but I would rather the time-area method, for which I need the isochrone maps.

Ideally I would like to calculate the amount of runoff going into the river at different points along it.
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Studiot
#2
Dec19-11, 10:56 AM
P: 5,462
Would these be for the Sahara Desert?

I am, of course guessing from your time of posting and therefore your probable time zone, in the absence of better information.
Bobbywhy
#3
Dec19-11, 06:32 PM
PF Gold
P: 1,880
From our EPA, this seems to deal with runoff calculations into rivers and lakes. I am not sure if this will be useful or not...

http://nepis.epa.gov/Exe/ZyNET.exe/2...es=5&ZyEntry=1


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