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<p class="MsoNormal">Dear GRASS users,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB">I am doing some stream extraction with r.stream.extract, just using a terrain model. This works generally quite nice.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">However, I notice that e.g. contributions of lakes and mires to stream generation are under-estimated if all pixels contribute equally, regardless of their land cover. Precipitation will be another issue when I move along
a continentality gradient or when looking at larger scale in general.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">My question now is, does anyone of you know good scientific papers that tackle these issues?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Or does anyone have suggestions on how to handle esp. the landcover issue?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">For precipitation would probably just experiment with some test cases and flow parameter in r.watershed, but land cover is much more difficult to quantify in a reasonable way just by experimenting…<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Thanks for any hints!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Kind regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Stefan<o:p></o:p></span></p>
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