Latest Contributions by ChristineDartiguenave

We are still in the process of moving Arc Hydro Tools to Pro. The best way to call the tools in pro is to use "import archydro" which is available with the most recent setups. You can try to type it in the Python window in Pro. Another way is to import each script. The issue with this method is for tools that have the same name in the core product (e.g. flowdirection or flowaccumulation). You may end up importing the core tool instead of the arc hydro tools. You can look in the tools to see how we are calling other tools (mainly calling the scripts for now) but eventually we will use import archydro. As a side note, the core is working on a tracing network (hydro network) that will allow performing the hydro network analyses in Pro. it should be available early next year.  Christine  ... View more

We are in the process of migrating/testing the Arc Hydro Tools from ArcMap into Pro, this is why you only see a subset in Pro. In addition, some of the capabilities needed to support the stormwater processes are not yet available in Pro (tracing our hydro network) and should be available at the beginning of next year. So at this time, you need to use the Arc Hydro Tools Python in ArcMap for stormwater. Christine Dartiguenave Esri Water Resources Team ... View more

There can be only one drainage line in each catchment (exception would be nhdplus with very small lines). In your case, the issue seems to be the source data. How did you create the drainage lines? The input streams need to go from confluence to confluence. A stream cannot connect to the middle of another stream as it seems to be the case on your picture. You need to split the long stream at the location where the smaller stream connects. You will end up with 3 drainage lines and 3 catchments. Christine Dartiguenave Esri Water Resources Team ... View more

This step is not needed anymore. Create Drainage Line Structures and Adjust Flow Direction in Streams will ensure that the water flows in the correct direction. You can check the Stormwater document to see the workflow. Christine Dartiguenave Esri Water Resources Team ... View more

I believe this issue has been fixed. Can you check with the latest version? Christine Dartiguenave Esri Water Resources Team ... View more

Please install the new patch for 10.6.1 and retest: The ArcGIS (Desktop, Engine, Server) 10.6.1 Spatial Analyst Patch is now live on the support site. The URL is: https://support.esri.com/en/download/7685 Christine Dartiguenave Esri Water Resources Team ... View more

The issue has been fixed with the SDK only. The developers are aware that it is not working in Python and are looking into it. In my case, I had a simple point symbol to assign and the following steps managed to assign the symbology to my new layer: Add the lyrx file to the map: m.addDataFromPath(mysymbologylayerxpath) Get the layer's symbology: mysymbology=m.listLayers()[0].symbology Remove the layer from the map: m.removeLayer(m.listLayers()[0]) Assign the symbology to my new layer in the map: new_layer.symbology=mysymbology They are ways to update some of the symbology properties as well if needed. I did not need to in my case. I hope this helps until the issue gets resolved. Christine Dartiguenave Esri Water Resources Team  ... View more

You probably do not have any lake and the listtodel variable was not initialized early enough in the code. I will fix it but you can add the line listtodel=[] in the execute function just after: sOK = apwrutils.C_OK Christine ... View more

Which version of Arc Hydro are you using? I believe this is something we have fixed. Internally, when we use the Con_sa tool, 0 is seen as no data unless we put an additional condition. Christine Dartiguenave Esri Water Resources Team ... View more

You can skip the QC tool if the results seem correct. If you see weird behaviors, you may always come back and QC. Usually QCing up front may be better so that you do not have to rerun the entire process multiple times. It is not mandatory however. Christine Dartiguenave Esri Water Resources Team ... View more

Synthetic streams are derived from the flow direction. They will always be oriented in the direction of the flows and their direction will match the direction of the underlying DEM. The direction of user specified streams may not match the direction of flows based on DEM in flat areas. So we need to adjust the direction in the flow direction grid to enforce the direction in the direction of the streams. Christine Dartiguenave Esri Water Resources Team ... View more

Check use case 5 in http://downloads.esri.com/archydro/ArcHydro/Doc/Overview%20of%20Arc%20Hydro%20terrain%20preprocessing%20workflows.pdf . Use case 5: Combined dendritic/deranged terrain with known sink and stream locations (using synthetic streams) 1) Create Drainage Line Structures using your input streams 2) DEM Reconditioning (using strlnk previously created as input stream). 3) Create Sink Structures (using you lakes as sinks and pass the stream as draft input line: will create a sink point at end of line). 4) Level DEM (this will enforce and level down the sinkpoly coming from lakes: make sure you set an offset to realy enforce them). 5) Fill Sinks (pass your sinkpoly so that they do not get filled) . 6) Flow Direction. 7) Adjust Flow Direction in Sinks: will ensure that within the sinkpol/lake water flows toward the sink point located at the end of the stream). 😎 Adjust Flow Direction in Streams: will ensure that once the flows reach the stream, they go along the stream.. Christine Dartiguenave Esri Water Resources Team ... View more

You will use if you have known Streams you want to use. Create Drainage Line Structures will create a rasterized version of those streams. This tool also create StrLnk which you can use as input Str raster in DEM Reconditioning (this way we use the same raster). Christine ... View more