JGRASS - peakflow hyetograph question

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JGRASS - peakflow hyetograph question

Matteo Paternolli

Hallo,

 

I'm doing an hydrological model using the function Peakflow running with the software Jgrass (version 1.0.6) and uDig 1.2-M9.

The model operates using the coefficients a and n from the rainfall depth-duration curves. The comparison of the results with an other model is quite good.

If I try to give as input a different hyetograph (with alternated blocks, but with same total rain as the other case) the maximum flow rate is 1/5 of the other case.

I think, there is a problem with the input file. How should be the stucture of the input hyetograph file? Should I write the mm of water or the intensity? How wide should be the intervals of the rain data?

Can someone send me an example of the input rain file?

Thank you,

 

Matteo Paternolli

 

 

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Abt. Wasserbau - Rip. opere idrauliche

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Re: JGRASS - peakflow hyetograph question

Silvia Franceschi-2
Ciao Matteo,
good to hear that Peakflow works well.
I am not sure about the format of the rainfall file for your version of the model, anyway you already did a simulation so I assume it is not a question of format but of contents. In the rainfall file you have to consider the mm of rain in each interval.
The interval has to be constant and it will be calculated as the difference between the first timestamp and the second of your rainfall file, you can choose the timestep you prefer based on the basin extension and the rainfall duration.

Hope this helps

Silvia



On 11/18/2011 12:32 PM, Matteo Paternolli wrote:

Hallo,

 

I'm doing an hydrological model using the function Peakflow running with the software Jgrass (version 1.0.6) and uDig 1.2-M9.

The model operates using the coefficients a and n from the rainfall depth-duration curves. The comparison of the results with an other model is quite good.

If I try to give as input a different hyetograph (with alternated blocks, but with same total rain as the other case) the maximum flow rate is 1/5 of the other case.

I think, there is a problem with the input file. How should be the stucture of the input hyetograph file? Should I write the mm of water or the intensity? How wide should be the intervals of the rain data?

Can someone send me an example of the input rain file?

Thank you,

 

Matteo Paternolli

 

 

----------------------------------------------------------
Ing. Matteo Paternolli
Techniker - Tecnico
Abt. Wasserbau - Rip. opere idrauliche

Ingenieure Patscheider & Partner GmbH
Ingegneri Patscheider & Partner S.r.l.
Avogadrostraße 2 - via Avogadro 2
39100 Bozen - Bolzano
Italien - Italia
Tel +39 0471/050 204
Fax +39 0471/052 868
[hidden email]
www.patscheiderpartner.it
----------------------------------------------------------

Achtung: Dieses Dokument ist ausschließlich dem Empfänger vorbehalten. Die darin enthaltenen Informationen, auch jene in etwaigen Anlagen, gelten im Sinne des Dekretes Nr. 196/2003 in Sachen "Privacy" als streng vertraulich und dürfen von anderen Personen nicht verwendet werden. Wer diese Mitteilung irrtümlicherweise erhält ist gebeten, uns umgehend zu informieren und anschließend die Mitteilung zu vernichten. Danke.

Attenzione: Questo documento è indirizzato esclusivamente al destinatario. Tutte le informazioni ivi contenute, compresi eventuali allegati, sono soggette a riservatezza secondo i termini del D.L. 196/2003 in materia di "privacy" e ne è proibita l'utilizzazione da parte di altri soggetti. Se avesse ricevuto per errore questo messaggio, La preghiamo cortesemente di contattare il mittente al più presto e di cancellare il messaggio subito dopo. Grazie.

 

 

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