NextGen Research Datastream (NRDS) Visualizer

	Funding for this project was provided by the National Oceanic & Atmospheric Administration (NOAA), awarded to the Cooperative Institute for Research to Operations in Hydrology (CIROH) through the NOAA Cooperative Agreement with The University of Alabama (NA22NWS4320003).

This app was created using an experimental Tethys + React app scaffold. It uses React for the frontend of the app and Tethys as the backend.

• Geospatial visualization of catchments, nexus points, flowpaths, and conus gauges
• Time series analysis of catchments and nexus points

Built on the Tethys Platform (Swain et al., 2015), it enables web-based exploration of model outputs (CIROH, 2025).

Usage Guide

Assited using launchApp Script

One of the advantages of the launchApp.sh script is that it allows the user to run the application inside a container, so no need to install extra python dependencies or npm packages

You should be able to see multiple outputs through the UI:

Unassisted Usage

Define the env variables and running the container

# Set environment variables
export TETHYS_CONTAINER_NAME="tethys-nrds"               \
       TETHYS_REPO="awiciroh/tethys-nrds"                \
       TETHYS_TAG="latest"                               \
       NGINX_PORT=80                                     \
       SKIP_DB_SETUP=false                               \
       CSRF_TRUSTED_ORIGINS="[\"http://localhost:${NGINX_PORT}\",\"http://127.0.0.1:${NGINX_PORT}\"]"

Run container

docker run --rm -d \
  -p "$NGINX_PORT:$NGINX_PORT" \
  --name "$TETHYS_CONTAINER_NAME" \
  -e SKIP_DB_SETUP="$SKIP_DB_SETUP" \
  -e NGINX_PORT="$NGINX_PORT" \
  -e CSRF_TRUSTED_ORIGINS="$CSRF_TRUSTED_ORIGINS" \
  "${TETHYS_REPO}:${TETHYS_TAG}"

Verify deployment:

docker ps
# CONTAINER ID   IMAGE                          PORTS                 NAMES
# b1818a03de9b   awiciroh/tethys-nrds:latest   0.0.0.0:80->80/tcp    tethys-nrds

Access at: http://localhost:80

Visualization Features

Nexus points can be visualized when the user selects the output that wants to visualize. Time series can be retrieved by clicking on any of the Nexus points, or by changing the select dropdown assigned to the Nexus.

Catchments time series can be retrieved by clicking on any of the Catchments polygons, or by changing the select dropdown assigned to the Catchments.

Data from CFE_NOM and LSTM can be retrieved for the avaialble forecasts for the Nexus and Catcments

This functionality allows the user to be able to quicklu search the data they want from the S3 bucket containing the output of the NextGen DataStream. They can explore and download as needed.

Development Installation

You need to install both the Tethys dependencies and the node dependencies.

The webpack dev server is configured to proxy the Tethys development server (see webpack.config.js). The app endpoint will be handled by the webpack development server and all other endpoints will be handled by the Tethys (Django) development server. As such, you will need to start both in separate terminals.

0. First create a Virtual Environment with the tool of your choice and then run the following commands

1. Install libmamba and make it your default solver (see: A Faster Solver for Conda: Libmamba):

   conda update -n base conda
   conda install -n base conda-libmamba-solver
   conda config --set solver libmamba
   

2. Install the Tethys Platform

   Using conda

   conda install -c conda-forge tethys-platform django=<DJANGO_VESION>
   

   or using pip

   pip install tethys-platform django=<DJANGO_VERSION>
   
   

3. Create a portal_config.yml file :

   To add custom configurations such as the database and other local settings you will need to generate a portal_config.yml file. To generate a new template portal_config.yml run:

   tethys gen portal_config

   You can customize your settings in the portal_config.yml file after you generate it by manually editing the file or by using the settings command command. Refer to the Tethys Portal Configuration documentation for more information.

4. Configure the Tethys Database

   There are several options for setting up a DB server: local, docker, or remote. Tethys Platform uses a local SQLite database by default. For development environments you can use Tethys to create a local server:

   tethys db configure

5. Install Node Version Manager and Node.js:

   5.1 Install Node Version Manager (nvm): https://github.com/nvm-sh/nvm?tab=readme-ov-file#install--update-script

   5.2 CLOSE ALL OF YOUR TERMINALS AND OPEN NEW ONES

   5.3 Use NVM to install Node.js 20:

   nvm install 20
   nvm use 20

6. Install the PDM dependency manager:

   pip install --user pdm

   NOTE: if you have previously installed pdm in another environment, uninstall pdm first (pip uninstall pdm), and then reinstall as shown above with the new environment active.

7. Clone the app and install into the Tethys environment in development mode:

   git clone https://github.com/CIROH-UA/ngiab-client.git
   cd ngiab-client
   pdm install
   npm install --include=dev
   cd ../

PDM Tips

See below for more PDM tips like how to manage dependencies, install dependencies, and run scripts.

Install only dev dependencies

• Install all dev dependencies (test & lint)

  pdm install -G:all

• Install only test dependencies

  pdm install -G test

• Install only lint and formatter dependencies

  pdm install -G lint

Managing dependencies

• Add a new dependency:

1. Add the package using pdm:

   pdm add <package-name>

2. Manually add the dependency to the install.yml.

   IMPORTANT: Dependencies are not automatically added to the install.yml yet!

• Add a new dev dependency:

  pdm add -dG test <package-name>
  pdm add -dG lint <package-name>

  NOTE: Just use pdm to install and manage dev dependencies. The install.yml does not support dev dependencies, but they shouldn't be needed in it anyway, right?

• Add a new optional dependeny:

  pdm add -G <group-name> <package-name>

  NOTE: You'll need to decide whether or not to add the optional dependencies to the install.yml b/c it does not support optional dependencies. You may consider using pdm to manage the optional dependencies.

• Remove a dependency:

1. Remove it from the pyproject.yaml and lock file:

   pdm remove --no-sync <package-name>

2. Manually remove it from the install.yml

3. If you want to remove it from the environment, use pip or conda to remove the package.

   IMPORTANT: TL;DR: Running pdm remove without the --no-sync will remove nearly all of the dependencies in your environment. While pdm remove is capable of removing the package from the environment, running pdm remove without the --no-sync option can break your Tethys environment. This is because pdm will attempt to get the environment to match the dependencies listed in your pyproject.toml, which usually does not include all of the dependencies of Tethys.

PDM Scripts

The project is configured with several PDM convenience scripts:

# Run linter
pdm run lint

# Run formatter
pdm run format

# Run tests
pdm run test

# Run all checks
pdm run all

Formatting and Linting Manually

This package is configured to use yapf code formatting

1. Install lint dependencies:

   pdm install -G lint

2. Run code formatting from the project directory:

   yapf --in-place --recursive --verbose .
   
   # Short version
   yapf -ir -vv .

3. Run linter from the project directory:

   flake8 .

   NOTE: The configuration for yapf and flake8 is in the pyproject.toml.

Testing Manually

This package is configured to use pytest for testing

1. Install test dependencies:

   pdm install -G test

2. Run tests from the project directory:

   pytest

   NOTE: The configuration for pytest and coverage is in the pyproject.toml.

Build Node Modules

Webpack is configured to bundle and build the React app into the tethysapp/<app_package>/public/frontend directory. Before building a Python distribution for release, you should build using this command:

npm run build

Test Node Modules

Use the following commands to lint and test the React portion of the app.

npm run lint
npm run test

The linting capability is powered by eslint and a number of plugins for React. The testing capabilities include jest, jsdom, testing-framework, user-event, and a few other JavaScript testing utilties to make it easy to test the frontend of the React-Tethys app.

Acknowledgements

The React + Django implementation is based on the excellent work done by @Jitensid that can be found on GitHub here: Jitensid/django-webpack-dev-server.

Contribute

Please feel free to contribute!