Delft3D Flexible Mesh Python

Python package to generate delft3dfm models from standardized data models or other flow models.

• Free software: MIT license
• WIKI (in Dutch): https://hkvconfluence.atlassian.net/wiki/spaces/DHYD/pages/222396421/Achtergrond

Features

• Read Hydamo or shape files to Python data structure
• Build Delft3D FM model from Hydamo or seperately defined elements
• Generate rectangular meshes with refinement
• Create 1D 2D connections
• Create RR model schematisation
• Write to Delft3D FM model

Installation

The package delft3dfmpy requires you to have (a) an environment with required dependencies and (b) an Integrated Development Envrionment (IDE) that can access this envrionment.

Please meet these two conditions first with instructions below before installing the Python package delft3dfmpy.

Environment Preparation

Prepare an environment with the correct dependencies for delft3dfmpy.

1. Install a Anaconda or Minoconda Python distribution:

   https://www.anaconda.com/products/individual https://docs.conda.io/en/latest/miniconda.html

2. Save the content of https://raw.githubusercontent.com/openearth/delft3dfmpy/master/environment.yml and store this in a local file named environment.yml

3. Open Ananconda prompt and enter the directory where the envrionment.yml from step 2 is stored.

4. Install the delft3dfmpy environment with the required modules, by executing the following command in the opened command prompt.

   conda env create -f environment.yml

   This should create a delft3dfmpy environment with the required dependencies.

5. Activate the created environment by the following command in command prompt:

   conda activate delft3dfmpy

   You now have a correct and activated environment for installation of the delft3dfmpy Python package

Python package delft3dfmpy

1. Install the Python package delft3dfmpy directly, by executing the following command in an Anaconda Prompt

   python -m pip install delft3dfmpy

   Note that in this way the most recent version that is available on PyPi (see releases) is installed. From June 2022, and version 2.0.1, delft3dfmpy expects DAMO2.2 GPKG files as input, instead of HyDAMO v13 GML-files.

   It is also possible to force installation of older versions and use the idential packages for GML input. The equivalent version of delft3dfmpy for HyDAMO v13 format is v1.2.3. This can be installed as follows:

   python -m pip install delft3dfmpy=1.2.3

2. If the command prompt states Successfully built delft3dfmpy then installation is succesful.

Envrionment Integration in your IDE

Integration of the prepared environment depends on the IDE of usage. Here we mention briefly some options for the user (pick one!):

1. For a new instance of Jupyter within the activated environment:

   Using Notebook

   conda install -c conda-forge notebook

   or using JupyterLab

   conda install -c conda-forge jupyterlab

2. To register the newly created environment as a new kernel for Jupyter (Notebook or JupyterLab):

   python -m ipykernel install --user --name=delft3dfmpy

3. No extra actions are required for PyCharm, Spyder or VSCode + Python extension.

Usage

Activate the created environment in an (Anaconda) command prompt (conda activate delft3dfmpy) before running your notebook or script. A Jupyter notebook or command prompt for the environment can also be launched from the Anaconda Navigator. For more information on how to use environments, see: https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html

The usage is best described by the example notebook: https://github.com/openearth/delft3dfmpy/blob/master/notebooks/Usage_introduction_coupled_RRFM.ipynb

Contribution

Contributions are much welcome for documentation, desirable features and bugs. The code and development happens in this GitHub repository: https://github.com/openearth/delft3dfmpy.

For contributions, use the following guidelines:

1. Fork the project on GitHub and clone the fork to your Operating System.

2. Make sure you have installed and activated the environment as is described above.

3. Delft3dfmpy uses flit to to build, package and publish the project. To install the development dependencies and register the cloned fork as a Python package for development purposes do the following:

   From an elevated Anaconda Prompt (run as Administrator) within the activated delft3dfmpy environment:

   conda install -c conda-forge flit

   flit install --deps develop --symlink

   This installs the development dependencies and creates a symbolic link in the Python site-packages folder of the activated environment.

4. Open the repository as folder/workspace in your favorite IDE (eg. VSCode + Python extension)

5. Make your contributions and test the changes locally.

6. Once satisfied, push your changes as a new branch to your fork and create a Pull Request to the original repository.

7. A maintainer on the main GitHub repository will review your PR and guide the merging process.