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Problem with Identifying Stream Network

Question asked by geonetadmin on Dec 16, 2011
Original User: joseph15

Good day!

I am trying to generate stream network using SRTM DEM. After pre-processing the DEM (reconditioning and filling depressions), I determined:

- flow direction; then
- flow accumulation; then
- stream order.

I was left with a drainage network but there seems to be a problem with the pattern. A box-like pattern appears along intersections. Please see attached picture. Can you help me get through with this? Thanks.

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