isochrone maps - are they widely available?

WaterEngineer

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.

*Studiot*

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

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

Similar Threads for: isochrone maps - are they widely available?
Thread	Forum	Replies
Is Sudarsky's system of extrasolar planet classification widely used? Why or why not?	General Astronomy	1
Mathematica widely underrated in Physics? Matlab widely overrated?	Math & Science Software	11
How widely accepted is Bell?	Quantum Physics	19
Math History: It is widely acknowledged...	General Math	8
Linear Maps/Matrix Maps	Engineering, Comp Sci, & Technology Homework	2

Studiot	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 Recognitions: Gold Member	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