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I have attached a picture of my vector stream layer in green and my watershed subbasin boundary in yellow. What I have done up to this point is: Fill sinks Dem recond. fill sinks Buildwalls with watershed boundary as outside and subbasin boundary as inside walls(I set inner wall height to 500 and left inner wall buffer and breach line buffer as 0) fill sinks flow direction flow direction with streams (I have tried to run this function but am only getting error) By looking at my stream layer and how it exits my subbasin in two places instead of one I am unsure of how to treat this. Any ideas? I thought flow direction with streams was my best option but it is not functioning. Thanks, heather
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02-23-2012
11:03 AM
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I am trying to use the flow direction with streams function using an existing stream layer. I am recieving the error message below. System.NullReferenceException: Object reference not set to an instance of an object. at ESRI.APWR.ApHydro.ArcHydroOp.FlowDirectionWithStreams(ApLayers apLayers, Double stepsize, Double startElevation, ITrackCancel& trackcancel, IGPMessages& messages, String& exMessage) System.NullReferenceException: Object reference not set to an instance of an object. at ESRI.APWR.ApHydro.ArcHydroOp.FlowDirectionWithStreams(ApLayers apLayers, Double stepsize, Double startElevation, ITrackCancel& trackcancel, IGPMessages& messages, String& exMessage) Failed to execute (FlowDirectionWithStreams). End Time: Thu Feb 23 07:44:33 2012 (Elapsed Time: 4.00 seconds) My stream vector layer's attribute table does have flow direction 1 field and I created hydroID, from node to node, and next downID from the attribute tools. Does anyone have any advice or info. for me? Thanks, Heather
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02-23-2012
10:20 AM
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