topic Re: Stream Network Creation in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/stream-network-creation/m-p/158972#M2242 <HTML><HEAD></HEAD><BODY><P>if you search for archydro you will get several links.</P><P>Basically you have to cut or "burn" a slot through your "dam wall" to simulate the culvert.</P></BODY></HTML> Mon, 22 Feb 2016 11:58:51 GMT NeilAyres 2016-02-22T11:58:51Z Stream Network Creation https://community.esri.com/t5/arcgis-spatial-analyst-questions/stream-network-creation/m-p/158971#M2241 <HTML><HEAD></HEAD><BODY><P>I am using the Hydrology tools (Flow Direction; Flow Accumulation etc.) to create a stream network from a 1m Lidar-derived raster DEM. The area has a railway running through it, with large embankments that have culverts under them to allow water flow upstream of the embankments to flow through downstream. However, the DEM does not recognise these culverts and converts the embankments to "dam walls", creating an incorrect streamflow network upstream of the embankments. Any ideas on how to overcome this? </P><P>Thanks very much.</P></BODY></HTML> Mon, 22 Feb 2016 10:53:54 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/stream-network-creation/m-p/158971#M2241 MarkNorris-Rogers 2016-02-22T10:53:54Z Re: Stream Network Creation https://community.esri.com/t5/arcgis-spatial-analyst-questions/stream-network-creation/m-p/158972#M2242 <HTML><HEAD></HEAD><BODY><P>if you search for archydro you will get several links.</P><P>Basically you have to cut or "burn" a slot through your "dam wall" to simulate the culvert.</P></BODY></HTML> Mon, 22 Feb 2016 11:58:51 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/stream-network-creation/m-p/158972#M2242 NeilAyres 2016-02-22T11:58:51Z