open TELEMAC-MASCARET The mathematically superior suite of solvers

Hi,

I try to follow the pluie example in order to include rainfall in my model. However, I only want to use the rainfall part of the SCS rainfall-runoff module with a formatted text file but not the infiltration part.
I use the hyetograph.txt to describe a fictitious rainfall event, but I am wondering what options need to be included in the steering file.
The goal is to simply model a forest slope (without a river present in the domain) during heavy and short rainfall events.


RAINFALL-RUNOFF MODEL = 1 (0 or 1 if infiltration is not used?)
DURATION OF RAIN OR EVAPORATION IN HOURS = 6. (Do I need that when I define the event in my time series?)
RAIN OR EVAPORATION = YES (Required?)
RAIN OR EVAPORATION IN MM PER DAY = 100.0 (Should that match the total rainfall defined in the time series?)
FORMATTED DATA FILE 1 =hyetograph.txt

Another question is the time series itself: Is there a requirement that the time series in the .txt file needs to match the simulation duration and are the time steps free to choose?

Thanks for any help on that!

Hi,

You can find information on how you can use the rainfall-runoff model in the documentation (user manual & validation document), please read it.

In the examples, please look at folder "pluie", there is an example of what you want to do. Furtuhermore, you can also read the comments in the source file runoff_scs_cn.f, you will find some further explanations on how you need to define the hyetograph file etc etc.

If you don't want to use the infiltration part of the SCS CN model, you have two options:
- easier: use SCS CN but set CN = 100 everywhere - this will allows you to use the part of the code reading the hyetograph file.
- harder: RAINFALL-RUNOFF MODEL = 0, but then you need to program the reading of your hyetograph file yourself in prosou.f

Hope it helps!

Best regards
PL