Source code for imod.mf6.simulation

import collections
import pathlib
import subprocess
import warnings

import jinja2
import numpy as np
import xarray as xr

import imod


[docs]class Modflow6Simulation(collections.UserDict): def _initialize_template(self): loader = jinja2.PackageLoader("imod", "templates/mf6") env = jinja2.Environment(loader=loader, keep_trailing_newline=True) self._template = env.get_template("sim-nam.j2")
[docs] def __init__(self, name): super().__init__() self.name = name self.directory = None self._initialize_template()
def __setitem__(self, key, value): super().__setitem__(key, value) def update(self, *args, **kwargs): for k, v in dict(*args, **kwargs).items(): self[k] = v def time_discretization(self, times): warnings.warn( f"{self.__class__.__name__}.time_discretization() is deprecated. " f"In the future call {self.__class__.__name__}.create_time_discretization().", DeprecationWarning, ) self.create_time_discretization(additional_times=times)
[docs] def create_time_discretization(self, additional_times): """ Collect all unique times from model packages and additional given `times`. These unique times are used as stress periods in the model. All stress packages must have the same starting time. Function creates TimeDiscretization object which is set to self["time_discretization"] The time discretization in imod-python works as follows: - The datetimes of all packages you send in are always respected - Subsequently, the input data you use is always included fully as well - All times are treated as starting times for the stress: a stress is always applied until the next specified date - For this reason, a final time is required to determine the length of the last stress period - Additional times can be provided to force shorter stress periods & more detailed output - Every stress has to be defined on the first stress period (this is a modflow requirement) Or visually (every letter a date in the time axes): >>> recharge a - b - c - d - e - f >>> river g - - - - h - - - - j >>> times - - - - - - - - - - - i >>> model a - b - c h d - e - f i with the stress periods defined between these dates. I.e. the model times are the set of all times you include in the model. Parameters ---------- additional_times : str, datetime; or iterable of str, datetimes. Times to add to the time discretization. At least one single time should be given, which will be used as the ending time of the simulation. Note ---- To set the other parameters of the TimeDiscretization object, you have to set these to the object after calling this function. Example ------- >>> simulation = imod.mf6.Modflow6Simulation("example") >>> simulation.create_time_discretization(times=["2000-01-01", "2000-01-02"]) >>> # Set number of timesteps >>> simulation["time_discretization"]["n_timesteps"] = 5 """ self.use_cftime = any( [model._use_cftime() for model in self.values() if model._pkg_id == "model"] ) times = [ imod.wq.timeutil.to_datetime(time, self.use_cftime) for time in additional_times ] for model in self.values(): if model._pkg_id == "model": times.extend(model._yield_times()) # np.unique also sorts times = np.unique(np.hstack(times)) duration = imod.wq.timeutil.timestep_duration(times, self.use_cftime) # Generate time discretization, just rely on default arguments # Probably won't be used that much anyway? timestep_duration = xr.DataArray( duration, coords={"time": np.array(times)[:-1]}, dims=("time",) ) self["time_discretization"] = imod.mf6.TimeDiscretization( timestep_duration=timestep_duration )
def render(self): """Renders simulation namefile""" d = {} solvername = None models = [] modelnames = [] for key, value in self.items(): if value._pkg_id == "tdis": d["tdis6"] = f"{key}.tdis" elif value._pkg_id == "model": models.append(("gwf6", f"{key}/{key}.nam", key)) modelnames.append(key) elif value._pkg_id == "ims": solvername = key d["models"] = models if solvername is None: raise ValueError("No numerical solution") d["solutiongroups"] = [[("ims6", f"{solvername}.ims", modelnames)]] return self._template.render(d) def write(self, directory=".", binary=True): # Check models for required content for key, model in self.items(): # skip timedis, exchanges if model._pkg_id == "model": model._check_for_required_packages(key) directory = pathlib.Path(directory) directory.mkdir(exist_ok=True, parents=True) # Write simulation namefile mfsim_content = self.render() mfsim_path = directory / "mfsim.nam" with open(mfsim_path, "w") as f: f.write(mfsim_content) # Write time discretization file self["time_discretization"].write(directory, "time_discretization") # Write individual models globaltimes = self["time_discretization"]["time"].values for key, value in self.items(): # skip timedis, exchanges if value._pkg_id == "model": value.write( directory=directory, modelname=key, globaltimes=globaltimes, binary=binary, ) elif value._pkg_id == "ims": value.write( directory=directory, pkgname=key, globaltimes=globaltimes, binary=binary, ) self.directory = directory def run(self, mf6path="mf6") -> None: if self.directory is None: raise RuntimeError(f"Simulation {self.name} has not been written yet.") with imod.util.cd(self.directory): result = subprocess.run(mf6path, capture_output=True) if result.returncode != 0: raise RuntimeError( f"Simulation {self.name}: {mf6path} failed to run with returncode " f"{result.returncode}, and error message:\n\n{result.stdout.decode()} " ) def write_qgis_project(self, crs, directory=".", aggregate_layers=False): directory = pathlib.Path(directory) directory.mkdir(exist_ok=True, parents=True) with imod.util.cd(directory): for key, value in self.items(): # skip timedis, exchanges if value._pkg_id == "model": value.write_qgis_project( key, crs, aggregate_layers=aggregate_layers )