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I am trying to use qgis to delineate between three sub-sub-catchments.

I have contour shape file of 20 meter height.

Sub-catchment is about 12 square kilometers area but consist of three sub-sub-catchments. Would like to use the information to determine the river density of each sb--sub-catchment.

Also would like to do slope calculation, using (exported to excel for graph profile).



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Welcome to GIS.SE! Have you tried anything yet, have you hit any particular problems? Or are you just looking for a general 'Point me in the right direction'. Questions like this that initially look like 'do the work for me' questions have a habit of getting ignored, so try and phrase your question in such a way as to give people something solid to answer, and as always, check the FAQ –  Rob Quincey May 8 '13 at 11:52
Do you mean statistics like calculated here? grasswiki.osgeo.org/wiki/R.stream.*#r.stream.stats –  markusN May 8 '13 at 19:42

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