<br><br><div class="gmail_quote">On Thu, Jul 21, 2011 at 3:30 PM, frans-joost <span dir="ltr"><<a href="mailto:fjboogert@gmail.com">fjboogert@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Dear GRASS users,<br>
<br>
I'm trying to implement the Morgan Morgan Finney model for erosion<br>
estimation.<br>
One problem I'm having is with the accumulation of surface runoff.<br>
Is it possible to sum all cells that are uphill, meaning each individual<br>
cell has an amount of water that flows downslope.<br>
It should be possible to use a flow direction map to accomplish this.<br>
<br>
r.terraflow does not have an option to accumulate using another map<br>
r.watershed gives me very high and negative values (not sure what happened<br>
there)<br></blockquote><div><br></div><div>This goes in the direction what I am trying to do with seed dispersal via water, and I did not get any responses - maybe not possible?</div><div><br></div><div>Rainer</div><div>
</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<br>
Thank you in advance<br>
Frans-Joost<br>
<font color="#888888"><br>
--<br>
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</font></blockquote></div><br><br clear="all"><br>-- <br>Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany)<br><br>Centre of Excellence for Invasion Biology<br>Stellenbosch University<br>
South Africa<br><br>Tel : +33 - (0)9 53 10 27 44<br>Cell: +33 - (0)6 85 62 59 98<br>Fax (F): +33 - (0)9 58 10 27 44<br><br>Fax (D): +49 - (0)3 21 21 25 22 44<br><br>email: <a href="mailto:Rainer@krugs.de" target="_blank">Rainer@krugs.de</a><br>
<br>Skype: RMkrug<br><br>