def test_unseeded_elements(self):
o = PlastDrift()
# Seeding elements for 12 hours, but running only 6
time = datetime(2019, 8, 30, 12)
o.seed_elements(lon=4.85, lat=60, number=10,
time=[time, time + timedelta(hours=6)],
origin_marker=7)
o.seed_elements(lon=4.75, lat=60, number=10,
time=[time, time + timedelta(hours=6)],
origin_marker=8)
o.set_config('environment:fallback:land_binary_mask', 0)
o.set_config('environment:fallback:y_sea_water_velocity', 1)
o.run(duration=timedelta(hours=3))
self.assertEqual(o.history.shape[0], 10)
self.assertEqual(o.history.shape[1], 4)
self.assertEqual(o.history['origin_marker'].min(), 7)
self.assertEqual(o.history['origin_marker'].max(), 8)
def test_wind_drift_shear(self):
"""Testing PlastDrift model, with wind-induced current shear"""
o = PlastDrift(loglevel=30)
o.set_config('environment:fallback:x_wind', 10)
o.set_config('environment:fallback:y_wind', 0)
o.set_config('environment:fallback:land_binary_mask', 0)
o.seed_elements(lat=60, lon=5, time=datetime.now(),
number=3,
z = np.array([0, -0.05, -.1]))
o.run(duration=timedelta(hours=10))
self.assertIsNone(np.testing.assert_array_almost_equal(
o.elements.lon,
[5.011935,5.01738,5.011235]))
self.assertAlmostEqual(o.elements.lat[0], o.elements.lat[2], 3)
from datetime import datetime, timedelta
from opendrift.readers import reader_netCDF_CF_generic
from opendrift.models.plastdrift import PlastDrift
o = PlastDrift(loglevel=0)
o.list_configspec()
# Arome atmospheric model
reader_arome = reader_netCDF_CF_generic.Reader(o.test_data_folder() + '16Nov2015_NorKyst_z_surface/arome_subset_16Nov2015.nc')
# Norkyst ocean model
reader_norkyst = reader_netCDF_CF_generic.Reader(o.test_data_folder() + '16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc')
o.add_reader([reader_norkyst, reader_arome])
o.set_config('general:basemap_resolution', 'h')
start_time = reader_arome.start_time
end_time = reader_arome.start_time + timedelta(hours=5)
end_time = reader_arome.end_time
time = [start_time, start_time + timedelta(hours=5)]
# Seeding some particles
lon = 4.6; lat = 60.0; # Outside Bergen
o.seed_elements(lon, lat, radius=50, number=3000, time=time)
o.run(end_time=end_time, time_step=1800, time_step_output=3600)
o2 = PlastDrift(loglevel=0)
o2.add_reader([reader_norkyst]) # No wind/Stokes
o2.set_config('general:basemap_resolution', 'h')
o2.seed_elements(lon, lat, radius=50, number=3000, time=time)