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2026 Esri UC | Water Resources Symposium - Detailed Agenda
Attend the 2026 Water Resources Symposium to explore the newest hydro tools, learn from peers, and participate in engaging discussions about water resources. This symposium requires a reservation Once you register for Esri UC, simply add the symposium to your schedule to save your place . 2026_Water Resources Symposium…
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Keep getting "zipfile.BadZipFile: File is not a zip file" error when running Create Runoff Raster from ArcHydro
I am attempting to run the Create Runoff Raster tool in the ArcHydro toolbox. It will run for a bit, and then I get the error "zipfile.BadZipFile: File is not a zip file." I am unsure where to go from here. I am using ArcPro 3.6 and have attempted to download and reinstall the package twice. Please help!
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Research on Water Harvesting in Dry and Semi-Dry Valleys
Hello, I want your help in writing a university academic research paper on natural geographical sciences in the field of hydrology, specifically on water harvesting in dry valleys relying on morphometric indicators.
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Issue Running Arc Hydro Burn Lines into DEM
Hey folks! Recently within the past few weeks I've run into an odd case where the Burn Lines into DEM tool will not create outputs when the tool says it has ran successfully. I saw that someone else posted about a similar problem with the flatburn tool as well. I'm wondering if this is because of Esri's latest update?…
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Issue Running Arc Hydro Identify Flat Areas tool
I am attempting to create a flood depth raster so I can run the Flood Impact Analysis Solution (FIAS) toolset in my water district. I am following the Creating Flood Depth Rasters for Flood Impact Analysis guidance document, but am getting stuck on the addressing flat areas section. When I run the Arc Hydro Identify Flat…
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Webinar Resources: GIS Methods, Tools, and Workflows for Water Resources
In this post, you will find resources from the GIS Methods, Tools, and Workflows for Water Resources webinar. The webinar slides are available at the bottom of this post. The webinar recording is available here. Resources Water resources – Overview: https://www.esri.com/en-us/industries/water-resources/overview Water…
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Outfall Evaluation/Inspections Data Management - looking for suggestions
Hello all! I'm sure folks here have experience with outfall and water-related infrastructure, and mapping/recording information such as outfall inspections and evaluations, stormwater inspections, etc. I'm hoping to gather input and suggestions about best practices and data management, using two options: 1. A feature layer…
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ERROR Deleting a Trace Network from a Feature Dataset
Hello, I am running into an error deleting trace networks from a feature dataset. In PRO Catalog I can select and delete the trace network. It shows as successfully being removed from the geodatabase, and then when I refresh the geodatabase is re-appears and has not been deleted. When I try to create another Trace Network…
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Best Workflow for Importing HEC-RAS Results into .CRF layer (ArcGIS Pro) for visualization?
Hi all, Long-time GIS user, but first-time water resources/H&H workflow question. I’m working on a project where consultants are developing separate HEC-RAS models for different drainage basins in our city, each producing flood surface results for various design storm events. Once all the modeling is completed, there’s a…
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Error in ArcHydro WIM tools 'metersPerUnit does not exist'
I am working through the Wetland Identification toolset in ArcHydro and am getting this error on a few tools (screenshot below). I am using .tif's only and have tried a few different versions of the input. My project area is pretty small. I would appreciate any insight into how to resolve this. Thanks!
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2025 Pre-UC Water Resources | Hydro Meeting
The 2025 Pre-UC Water Resources | Hydro Meeting was a great success! Thank you to all of the presenters. I've uploaded PDF versions of the presentations. Please note that only presentators that have given permission to share their content are represented. See everyone next year! 🙂
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DEM Reconditioning does not change DEM
I'm using ArcGIS Pro version 3.5.2, standard license with 3D and spatial analyst extensions. I am using DEM Reconditioning tool to burn my stream into the DEM. The tool finished successfully but the resulting AGREEDEM is essentially the same as the input DEM (the difference is in the 5th decimal places). I have look…
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What Flow Accumulation Threshold Should I Use?
An older version of this blog references USGS WaterWatch as the source for runoff data for the Create Runoff Raster geoprocessing tool. The tool and blog have been updated to use a higher resolution global runoff dataset from TerraClimate. Background The delineation and analysis of stream networks within a Geographic…
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DEM Processing for Erosion Error
Hello all, I'm trying to run through ArcHydro's H&H Erosion tools but I'm stuck on the second part "DEM Processing for Erosion" any time I try to run it, I get the error "['line 103', 'c:\\program files\\arcgis\\pro\\Resources\\ArcToolbox\\Scripts\\archydro\\demprocessingforerosion.py', 'OSError: "" does not exist']"…
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Webinar Resources: Linear Referencing and Dynamic Segmentation with Arc Hydro
In this post, you will find resources from the Linear Referencing and Dynamic Segmentation with Arc Hydro webinar. The webinar slides are available at the bottom of this post. The webinar recording is now available, you can find it here. Resources Water resources –…
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HAND Based Flood Depth and Extent not running in entire watershed
I have been running the HAND-based Flood Depth and Extent From Table tool for two adjoining watersheds. However, I consistently receive output—both flood depth raster and flood extent polygon—for only one watershed, and even that appears in fragmented sections. Despite rerunning the tool multiple times, the result remains…
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Water Resources Events and Activities UC2025 Flier
The Esri User Conference (Esri UC) has many presentations and events with hundreds of topics covered. To help you find your way to the Water Resources sessions and events, we have prepared a focused agenda.
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Need help with Create Vegetative Cover Factor Raster - Error 010414
Hello, I'm running into a reoccurring issue with the Create Vegetative Cover Raster tool. Every time I have tried to run it, I receive a 010414 error message stating that a raster could not be created from a geodataset. I noticed that recently, some videos demonstrating the Arc Hydro Erosion Toolset have been uploaded:…
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Estimate the 5-, 10-, 15-, 25-, and 100-year flows using the Unit Hydrograph method in Pro or ArcMap?
Hi, Is there a way to estimate the 5-, 10-, 15-, 25-, and 100-year flows using the Unit Hydrograph method in Pro or ArcMap? Or do I need to use HEC-HMS software (or HEC GeoHMS and HEC GeoRAS for ArcMap)? I'm currently using ModelBuilder in ArcGIS Pro 3.4 to: * Delineate watersheds based on culvert points, and * Estimate…
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Webinar Resources: Know the Flow: Streamflow Forecast Services and Apps
In this post, you will find resources from the Know the Flow: Streamflow Forecast Services and Apps. The webinar slides are available at the bottom of this post. The webinar recording is now available, you can find it here. If you have any questions regarding the webinar, please register here for our May Water Resources…
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Arc Hydro Characterize DEM - Flat Area Raster step fails
Hello everyone, I'm stuck on the Characterize DEM tool in the Arc Hydro Erosion Toolset. Every time I have attempted to run the tool, it produces a landform raster but then fails on the next step: identifying flat areas and generating a flat area raster. I found a recent post that seems to be addressing the same issue: Arc…
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Generate Node Link Schema Not Working
I'm working my way through the Arc Hydro - Support for Hydrologic Modeling.pdf for the purposes of preparing a hydrologic model for input into HMS. For the Generate Node Link Schema script I get several warnings like what I have pasted below. I've ensured I have no unsaved edits in Pro. The Schema Nodes and Links get…
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Adjoint Catchment wrong NextDownID
I'm running ArcHydro 3.2.52 in ArcGIS Pro 3.3.2. I'm trying to see which catchment drains to which downstream catchment using Adjoint Catchment Processing. The pre-processing steps (generating drainage lines, catchments etc) work fine. The NextDownID in the Catchments get populated when running the Adjoint Catchment…
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Cannot run ArcHydro Tools
Hello! I cannot run ArcHydro tools at all, and it looks like a problem with Python. I have tried multiple versions of ArcGIS Pro (3.0 and 3.1) and ArcHydro tools on multiple platforms, and all of them have had the same problem. Currently: ArcGIS Pro 3.2.4 ArcHydro Tools 3.2.52 python version 3.9.18 Windows Desktop Runtime…
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Error Running Generate CN Raster Tool
Hello! I'm generating an error message when running the Generate CN Raster tool. I've prepared the datasets according to the tool's documentation. Reading the error message, not sure if this is my environment or an issue with the Python code. I've zipped up a Project Package containing the datasets (soil poly, DEM, curve…
