• Identifying potential project areas with ArcHydro

    Hello everyone,   I recently discovered the ArcHydro toolbar (using it to calculate the watershed/drainage area leading to our dams and other water control structures). I definitely plan on exploring the toolbar...
    created by SeanHaight
  • ArcGIS Pro Tutorial & Sample Data

    Does anyone know if there are any ArcGIS Pro workflows that support flood inundation modeling? I am looking to eventually replicate what Texas Emergency Management did with their Pin2Flood solution that show...
    last modified by eshreve_azdema
  • Arc Hydro: strange results for stream delineation

    I am deriving flow paths on a hu12-by-hu12 scale. Using the following workflow, I have successfully derived flow paths for a handful of subwatersheds, so I don't understand why my methods aren't working now.   S...
    created by Nlog10
  • I am having this error while using Arch hydro and HEC-GeoHMS tools in Arc map, i wonder if any one of have a solution for that error:

    This is the error: System.Runtime.InteropServices.COMException (0x80004005): Error HRESULT E_FAIL has been returned from a call to a COM component.    at ESRI.ArcGIS.Geoprocessing.GeoProcessorClass.Execute(...
    last modified by omarnofal
  • Stream extraction mistaking roads as streams

    I am finding the watershed and streams in an area that contains a few roads. It is mistaking some of the roads as streams. How do I make sure the stream extraction isn't picking up the roads as well?
    last modified by sarahbwellsUNC
  • Stream extraction mistaking roads as streams

    I am finding the watershed and streams in an area that contains a few roads. It is mistaking some of the roads as streams. How do I make sure the stream extraction isn't picking up the roads as well?
    created by sarahbwellsUNC
  • Burn Stream Slope causing entire DEM to change elevation???

    I used the "Burn Stream Slope" function in ArcHydro and the results are.. strange. When I use the identify on the previous DEM and the resulting DEM at the top of a hill (not at a stream) the entire DEM has shifted el...
    last modified by zieglerhm_CDMSmith
  • Create Overland Flow Connectors - Weird Line Error

    Hello,   I am new to ArcHydro and trying to work through the stormwater processing steps. When I get to the Create Overland Flow step, I get some weird errors back, and all of the overland flow lines are starfis...
    last modified by michelle_2ndnature
  • Pro - Why can't I use a linear feature class as input for DEM Reconditioning?

    Greetings,   I am using Arc Hydro tools in Pro 2.3. I need to burn NHD streams (LocalRes) into a DEM (3DEP LiDAR - 2.5'). The DEM Reconditioning tool will only take a Raster as the input stream. In ArcMap, it ta...
    last modified by JMark@dnr.IN.gov_indnr
  • How can I  automate  the workflow to manipulate a DEM with the ModelBuilder?

    Hi   I like to use the ModelBuilder to automate the workflow of manipulating a DEM on special locations. The input is a polygon shape marking bridges and street dams.   Normally the workflow is CLIP (po...
    last modified by GK76137
  • Getting started with flood modelling

    We're starting a project to map various flood inundation scenarios in a dozen plus locations. I'm an old hand with GIS tools in and out of the Esri ecosystem but brand new to the world of ArcHydro. I've read through t...
  • HEC GeoHMS and HEC GeoRAS extensions for ArcGIS pro

    I would like to ask you if there has been scheduled the creation of the HEC GeoHMS and HEC GeoRAS extensions for ArcGIS pro.   Thank you in advance.
    last modified by forestavros
  • Problems Installing 10.6.1 Spatial Analyst Patch

    Hello,   I am trying to solve a variety of problems in ArcHydro and it looks like I need to install a patch. I am using ArcMap 10.6. However, when I download the patch here: ArcGIS (Desktop, Engine, Server)...
    last modified by michelle_2ndnature
  • Calling Arc Hydro Tools in Python in ArcGIS Pro?

    Hello, I am testing some python scripts created originally in ArcGIS 10.3.1/10.5.1 which utilize the ArcHydroTools module. I have installed the latest Arc Hydro package in ArcGIS Pro, but it still doesn't recognize t...
    last modified by jgaiot
  • ArcHydro Problem Solvers

    This is a collection of actions I've learned to take when I'm having problems with ArcHydro or HEC-GeoHMS. I'll add to the list when I find more. Make sure the Geoprocessing extents include the whole project: Go to t...
    last modified by MBoucher21
  • How to generate watershed for a particular water body?

    Hello everyone - I'm working on an analysis of public drinking water sources at a conservation organization. I am new to using Arc Hydro, but would like to implement it on this project. I have followed some guides on ...
    last modified by DaveHeacock
  • Drainage line processing and catchment polygon processing returns error

    Whenever I try any of these tools " Drainage line processing and catchment polygon processing" it gives me this error "error hresult e_fail has been returned from a call to a com component" I tried it with different...
    last modified by momorsy
  • Problem with DEM mosaic in watershed delineation project

    I am trying to delineate nearly 700 watersheds from Stormwater outflow points on relatively small order streams. I have found that 1-meter and 30-meter DEMs are either too fine or too coarse of a scale for this work. ...
    last modified by jdacord0
  • Clean Arc Hydro temp files/folders on the fly within a Model

    Hi,   I am running Arc Hydro commands within a Model and would like to include deletion of the temp files within the model to better manage disk space usage.   I know there is the 'manual' option in the Ap...
    last modified by insyzygy
  • Unable to input stream feature class into DEM Reconditioning

    ArcGIS Pro 2.0.1   We have recently upgraded to ArGIS Pro 2.0 and I am attempting to use ArcHydro to update our stream layer based on new DEM data. I have the NHD stream feature class that I need to burn into th...
    last modified by dwade10