Note
Go to the end to download the full example code
Seafloor oil spill
from datetime import timedelta
from opendrift.readers import reader_netCDF_CF_generic
from opendrift.models.openoil import OpenOil
o = OpenOil(loglevel=20) # Set loglevel to 0 for debug information
# Norkyst
reader_norkyst = reader_netCDF_CF_generic.Reader(o.test_data_folder() + '14Jan2016_NorKyst_z_3d/NorKyst-800m_ZDEPTHS_his_00_3Dsubset.nc')
#reader_norkyst = reader_netCDF_CF_generic.Reader('https://thredds.met.no/thredds/dodsC/sea/norkyst800m/1h/aggregate_be')
o.add_reader([reader_norkyst])
o.set_config('environment:fallback:x_wind', 3)
o.set_config('environment:fallback:y_wind', 7)
o.set_config('drift:vertical_mixing', True)
16:50:37 INFO opendrift.models.basemodel:528: OpenDriftSimulation initialised (version 1.10.7 / v1.10.6-168-g8266719)
16:50:37 INFO opendrift.readers.reader_netCDF_CF_generic:92: Opening dataset: /root/project/tests/test_data/14Jan2016_NorKyst_z_3d/NorKyst-800m_ZDEPTHS_his_00_3Dsubset.nc
Setting the range of droplet sizes for the seafloor release
o.set_config('seed:droplet_size_distribution','uniform')
o.set_config('seed:droplet_diameter_min_subsea', 0.0001)
o.set_config('seed:droplet_diameter_max_subsea', 0.0005)
# 'normal' and 'lognormal' distributions can also be specified
# o.set_config('seed:droplet_size_distribution','lognormal')
# o.set_config('seed:droplet_diameter_mu',0.001) # 1 mm
# o.set_config('seed:droplet_diameter_sigma',0.0008) # 0.8 mm
Seeding some particles
time = [reader_norkyst.start_time,
reader_norkyst.start_time + timedelta(hours=1)]
o.seed_elements(lon=4.5, lat=62.0, z='seafloor', radius=0, number=3000,
time=time, oil_type='GENERIC DIESEL')
16:50:37 INFO opendrift.models.openoil.openoil:1602: Using uniform droplet size distribution between 0.0001 and 0.0005 m for elements seeded below sea surface.
16:50:37 INFO opendrift.models.openoil.adios.dirjs:71: Querying ADIOS database for oil: GENERIC DIESEL
16:50:37 INFO opendrift.models.openoil.openoil:1657: Using density 841.2 and viscosity 6.3404392151148136e-06 of oiltype GENERIC DIESEL
16:50:37 INFO opendrift.models.basemodel.environment:220: Adding a dynamical landmask with max. priority based on assumed maximum speed of 1.0 m/s. Adding a customised landmask may be faster...
16:50:43 INFO opendrift.models.basemodel.environment:247: Fallback values will be used for the following variables which have no readers:
16:50:43 INFO opendrift.models.basemodel.environment:250: x_wind: 3.000000
16:50:43 INFO opendrift.models.basemodel.environment:250: y_wind: 7.000000
16:50:43 INFO opendrift.models.basemodel.environment:250: upward_sea_water_velocity: 0.000000
16:50:43 INFO opendrift.models.basemodel.environment:250: sea_surface_wave_significant_height: 0.000000
16:50:43 INFO opendrift.models.basemodel.environment:250: sea_surface_wave_stokes_drift_x_velocity: 0.000000
16:50:43 INFO opendrift.models.basemodel.environment:250: sea_surface_wave_stokes_drift_y_velocity: 0.000000
16:50:43 INFO opendrift.models.basemodel.environment:250: sea_surface_wave_period_at_variance_spectral_density_maximum: 0.000000
16:50:43 INFO opendrift.models.basemodel.environment:250: sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
16:50:43 INFO opendrift.models.basemodel.environment:250: sea_ice_area_fraction: 0.000000
16:50:43 INFO opendrift.models.basemodel.environment:250: sea_ice_x_velocity: 0.000000
16:50:43 INFO opendrift.models.basemodel.environment:250: sea_ice_y_velocity: 0.000000
16:50:43 INFO opendrift.models.basemodel.environment:250: ocean_vertical_diffusivity: 0.020000
16:50:43 INFO opendrift.models.basemodel.environment:250: ocean_mixed_layer_thickness: 50.000000
16:50:43 WARNING opendrift.models.basemodel.environment:465: Simulation has no simulation_extent, cannot check reader coverage
Running model with a small timestep to resolve the boyant rising
o.run(duration=timedelta(hours=2), time_step=60, time_step_output=60)
16:50:43 INFO opendrift.models.basemodel:891: Using existing reader for land_binary_mask
16:50:43 INFO opendrift.models.basemodel:903: All points are in ocean
16:50:43 INFO opendrift.models.openoil.openoil:651: Oil-water surface tension is 0.029464 Nm
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Print and plot results
print(o)
o.animation_profile()
===========================
--------------------
Reader performance:
--------------------
/root/project/tests/test_data/14Jan2016_NorKyst_z_3d/NorKyst-800m_ZDEPTHS_his_00_3Dsubset.nc
0:00:03.4 total
0:00:00.0 preparing
0:00:02.2 reading
0:00:01.9 interpolation
0:00:00.1 interpolation_time
0:00:00.0 masking
0:00:01.1 rotating vectors
--------------------
global_landmask
0:00:00.0 total
0:00:00.0 preparing
0:00:00.0 reading
0:00:00.0 masking
--------------------
Performance:
19.1 total time
6.4 configuration
0.3 preparing main loop
0.0 moving elements to ocean
12.0 main loop
4.4 updating elements
0.1 oil weathering
0.0 updating viscosities
0.0 updating densities
0.0 evaporation
0.0 emulsification
0.0 dispersion
3.8 vertical mixing
0.3 cleaning up
--------------------
===========================
Model: OpenOil (OpenDrift version 1.10.7)
3000 active Oil particles (0 deactivated, 0 scheduled)
-------------------
Environment variables:
-----
sea_floor_depth_below_sea_level
sea_water_salinity
sea_water_temperature
x_sea_water_velocity
y_sea_water_velocity
1) /root/project/tests/test_data/14Jan2016_NorKyst_z_3d/NorKyst-800m_ZDEPTHS_his_00_3Dsubset.nc
-----
land_binary_mask
1) global_landmask
-----
Readers not added for the following variables:
ocean_mixed_layer_thickness
ocean_vertical_diffusivity
sea_ice_area_fraction
sea_ice_x_velocity
sea_ice_y_velocity
sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment
sea_surface_wave_period_at_variance_spectral_density_maximum
sea_surface_wave_significant_height
sea_surface_wave_stokes_drift_x_velocity
sea_surface_wave_stokes_drift_y_velocity
upward_sea_water_velocity
x_wind
y_wind
Discarded readers:
Time:
Start: 2016-01-14 00:00:00 UTC
Present: 2016-01-14 02:00:00 UTC
Calculation steps: 120 * 0:01:00 - total time: 2:00:00
Output steps: 121 * 0:01:00
===========================
16:50:56 INFO opendrift.models.basemodel:4514: Saving animation to /root/project/docs/source/gallery/animations/example_oilspill_seafloor_0.gif...
16:51:10 INFO opendrift.models.basemodel:3178: Time to make animation: 0:00:14.456608
o.animate_vertical_distribution(bins=30, subsamplingstep=5)
16:51:12 INFO opendrift.models.basemodel:4514: Saving animation to /root/project/docs/source/gallery/animations/example_oilspill_seafloor_1.gif...
16:51:31 INFO opendrift.models.oceandrift:689: Time to make animation: 0:00:20.977856
o.plot_oil_budget()
Total running time of the script: (0 minutes 57.590 seconds)