<br><br><div class="gmail_quote">On Wed, Jul 11, 2012 at 1:49 PM, Vishal Mehta <span dir="ltr"><<a href="mailto:vishalm1975@gmail.com" target="_blank">vishalm1975@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Thanks Soren,<br>
That explains some of the results i'm getting, with water piling up above the surface in the edges in low-lying areas.<br>
<br>
Can you please tell me how i can change that to constant flux or constant head? If constant flux, should that be in m/s units?<br>
<br>
My problem though is that i dont know what a constant flux or head at
the edges should be set to. For now the only bc i have put in there
deliberately (beyond the default you mention) is that i have set
constant head in stream pixels. I'll have to let flow through at the
edges but i have no idea what that flow should be. Are there some ways
of setting the edge conditions such that the gw evolution in the central
areas of interest are not highly influenced?<br>
<br>And Markus at the very least the manual should make it explicit that the default is a no-flux boundary.<br>
Thanks,<br>
Vishal<div class="HOEnZb"><div class="h5"><br><br><div class="gmail_quote">On Wed, Jul 11, 2012 at 1:15 PM, Markus Neteler <span dir="ltr"><<a href="mailto:neteler@osgeo.org" target="_blank">neteler@osgeo.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi Vishal, Sören,<br>
<br>
please send me a text snippet for inclusion into the manual in case<br>
you want it to be improved.<br>
<br>
thanks<br>
<span><font color="#888888">Markus<br>
</font></span><div><div><br>
On Wed, Jul 11, 2012 at 9:33 PM, Sören Gebbert<br>
<<a href="mailto:soerengebbert@googlemail.com" target="_blank">soerengebbert@googlemail.com</a>> wrote:<br>
> Hi,<br>
> as default the boundaries are no flow boundary conditions called<br>
> "homogeneous Neumann". Hence the default flux is 0.<br>
><br>
> Best regards<br>
> Soeren<br>
><br>
> 2012/7/11 Vishal Mehta <<a href="mailto:vishalm1975@gmail.com" target="_blank">vishalm1975@gmail.com</a>>:<br>
>> Hi all,<br>
>><br>
>> I've been trying to use r.gwflow recently, for groundwater modeling in urban<br>
>> environments.<br>
>><br>
>> The r.gwflow help says that the default boundary conditions at the edges of<br>
>> the region are Neumann conditions, which i understand are fixed flux<br>
>> conditions. However the help does not include the value of the default flux<br>
>> conditions at the boundary. Can someone help me figure out what that is?<br>
>><br>
>> Also, if there is anyone actively using r.gwflow who is interested in<br>
>> engaging a bit more, please let me know.<br>
>> Thanks,<br>
>> Vishal<br>
>><br>
>> --<br>
>> Vishal K. Mehta, PhD<br>
>> Scientist<br>
>> Stockholm Environment Institute - US<br>
>> 133 D St Suite F<br>
>> Davis CA 95616<br>
>> <a href="http://www.sei-us.org" target="_blank">www.sei-us.org</a><br>
>><br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>Vishal K. Mehta, PhD<br>Scientist<br>Stockholm Environment Institute - US<br>133 D St Suite F<br>Davis CA 95616<br><a href="http://www.sei-us.org" target="_blank">www.sei-us.org</a><br>
</div></div></blockquote></div><br><br clear="all"><br>-- <br>Vishal K. Mehta, PhD<br>Scientist<br>Stockholm Environment Institute - US<br>133 D St Suite F<br>Davis CA 95616<br><a href="http://www.sei-us.org">www.sei-us.org</a><br>