I have ran ArcHydro (Arc Hydro Tools for ArcGIS 10.1 BETA) on a DEM (laser data, 10 "ground hits" per square meter and cell size 0,5): Fil Sinks Flow Direction Flow Accumulation Stream Definition Stream Segmentation Catchment Grid Delineation Catchment Polygon Processing Drainage Line Processing Adjoint Catchment Processing Drainage Point Processing My problem is that the drainage lines a lot of times are crossing the rivers (se attachement). It seems to me that the drainage line, once meeting the river, should follow it and not crossing over, which it does all the time. Apart from when the drainage lines are crossing the rivers, the analysis elsewhere is good. Have any of you experienced this and could shed some light on have to solve this? Best regards Stein
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