NHM-Assist

NHM-Assist is a collection of python workflows presented in Jupyter notebooks for evaluating, running and interpreting National Hydrologic Model (NHM) domains using pywatershed. NHM-Assist allows users to:

• evaluate hydrofabric element connections such as hydrologic response unit connections to streamflow segments, segment routing order, and gage placement accuracy;
• display NHM domain parameter values on interactive maps and plots;
• run the NHM domain using pywatershed and create output for chosen variables;
• display NHM domain output values, such as recharge or actual evapotranspiration, on interactive maps and plots; and
• display simulated and observed streamflow for model gages on interactive plots.

Select interactive maps and plots generated by NHM-Assist are saved locally in .html format and displayed in a web browser.

Install conda-forge miniforge on your PC

Instructions for standard installation of conda-forge miniforge is available at this link For USGS users, it is recommended to use the agency ???

Build the environment

Open a miniforge prompt.

If the nhm environment already exists, then remove it:

conda remove -y --name nhm --all

Install a fresh env:

conda env create -f environment.yaml

1/8/25 note: need to run 'python pull_domain.py --name=willamette_river' in the command window from the repo to get the example/sample model

Activate the environment:

activate nhm

Launch Jupyter

jupyter lab

Ready to go! 👍