Non negligible STP flows

Frank Koormann frank.koormann at
Fri Dec 19 12:51:45 CET 2003


* Johan.Olanders.0925 <Johan.Olanders.0925 at> [031219 12:36]:
> Hello
> The river flows in my implemenatation of the Ouse catchment are based on
> a simple water balance model correlated with corresponding sub-catchment
> area. However preliminary simulation results suggests that the flows
> originating from some STPs need to be included to get realistic river
> flows, especially in low flow periods.
> My plan is to manually add these flows and re-process the source files.
> My question is:
> Is there an easier solution?

No, I am not aware of one. There are more complex one's, like the LAF
concept Carsten Schulze used in the processing of the Eifel-Rur for his 
PHD Thesis. The concept is described in
Modelling and evaluating the aquatic fate of detergents / Schulze, C.

The idea behind this is that the modeled flow is teh more accurate the
nearer a stretch is in relation to a gauging station (which was used to
calibrate the model). 

Also when adding flows from the STPs manually you should take care of
the flows at available gauging sites. If not too old these cover also
the flows from STPs.

Best regards and Merry Christmas to you and all listers,


Frank Koormann                             <frank.koormann at>
 Professional Service around Free Software       (
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