Algorithms for flow direction

[margherita]

Hi List,

Can anyone point me out any references regarding the algorithms
implemented in flow direction/accumulation construction and river
network extraction with jgrass? is it possible with jgrass to run
different methods, such as Single Flow Direction, Multiple FD, DEMON,
ANDRA, RHO, or others?

Thank you in advance

--
Eng. Margherita Di Leo
Ph.D. Candidate
Methods and Technologies for Environmental Monitoring
Department of Environmental Engineering and Physics (DIFA)

University of Basilicata
Campus Macchia Romana
85100 - Potenza
Italy

Office: [phone]
Fax: [phone]





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[Silvia Franceschi-2]

Ciao Margherita,
all the references for the Horton Machine modules are in:
Rigon R., Ghesla E., Tiso C. & Cozzini A., Cozzini The HORTON machine: a system for DEM analysis : the reference manual . Trento: Università di Trento. Dipartimento di ingegneria civile e ambientale, May 2006. - p. viii, 136, ISBN 10:88-8443-147-6.

You can download it from this link http://www.ing.unitn.it/dica/hp/?user=rigon under Publications (pdf).

In JGrass we have only the D8 flow direction module and a correction on that based on Orlandini, I think Riccardo and Daniele can explain better.

Ciao

Silvia

On Thu, Feb 18, 2010 at 3:24 PM, Margherita Di Leo <[hidden email]> wrote:

Hi List,

Can anyone point me out any references regarding the algorithms
implemented in flow direction/accumulation construction and river
network extraction with jgrass? is it possible with jgrass to run
different methods, such as Single Flow Direction, Multiple FD, DEMON,
ANDRA, RHO, or others?

Thank you in advance

--
Eng. Margherita Di Leo
Ph.D. Candidate
Methods and Technologies for Environmental Monitoring
Department of Environmental Engineering and Physics (DIFA)

University of Basilicata
Campus Macchia Romana
85100 - Potenza
Italy

Office: [phone]
Fax: [phone]





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[Riccardo Rigon]

I see that Silvia already answered. However, in the Horton Machine is implemented also the multiple flow direction (but I would discourage to use it since it does not have a theoretical rational: was just a primitive effort by P. Quinn and others). The method given by Draindir is the one derived from Orlandini et al 2003, which also generalizes the single flow direction. Do not know what others methods are, except DEMON (Costa Cabral, I suppose: it should not give results different or better than Orlandini's method). However Orlandini method is good enough to solve most of the problems I had. I have also theoretical reasons for not implementing Dinfinity (by David Tarboton). 

However,  I will appreciate if you can give us information about the other methods.

All the best,

riccardo rigon 

On Feb 18, 2010, at 3:24 PM, Margherita Di Leo wrote:

Hi List,

Can anyone point me out any references regarding the algorithms
implemented in flow direction/accumulation construction and river
network extraction with jgrass? is it possible with jgrass to run
different methods, such as Single Flow Direction, Multiple FD, DEMON,
ANDRA, RHO, or others?

Thank you in advance

--
Eng. Margherita Di Leo
Ph.D. Candidate
Methods and Technologies for Environmental Monitoring
Department of Environmental Engineering and Physics (DIFA)

University of Basilicata
Campus Macchia Romana
85100 - Potenza
Italy

Office: [phone]
Fax: [phone]





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Publications according to ISI: http://www.researcherid.com/rid/B-5395-2008

JGrass (Open Source GIS): http://www.jgrass.org/

GEOtop (Open Source distributed hydrological model):  http://www.geotop.org/

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