[GRASSLIST:7880] using r.fill.dir

[Armando Scalise]

I need to estimate the areas of a set of lagoons for differente water height 
scenarios. 
I am using the SRTM 30 DEM and I was hoping to apply r.fill.dir, to get the 
water height.

The documentation for r.fill.in <http://r.fill.in> stgates that "The 
procedure takes an elevation layer as input and initially fills all the 
depressions with one pass across the layer". 

Unfortunately, there is no specification as to how tis is done. I have 
searched for the paper describign the algortihm on whihc
r.fill.in<http://r.fill.in>is based "Software Tools to Extract
Structure from Digital Elevation Data
for Geographic Information System Analysis" by S.K. Jenson and J.O. Domingue 
(1988). but I have been unable to find it in the internet. 

I need to ask two questions: 
1) is there any other method you would reccomend in addition to
r.fill.dirto compute water height/areas ratio for depressions using a
DEM?
2) Anybody has a copy of the above cited paper or a detailed description of 
the algortuhm? 

Cheers thanks 

Armando Scalise 

il.com <http://il.com>
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