CAMELS-GB¶

Overview¶

CAMELS-GB is the Great Britain hydrological dataset implementation. Great Britain CAMELS dataset covering catchments in England, Scotland, and Wales.

Dataset Information¶

Region: Great Britain
Module: hydrodataset.camels_gb
Class: CamelsGb

Features¶

Static Attributes¶

Static catchment attributes include: - Basin area - Mean precipitation - Topographic characteristics - Land cover information - Soil properties - Climate indices

Dynamic Variables¶

Timeseries variables available (varies by dataset): - Streamflow - Precipitation - Temperature (min, max, mean) - Potential evapotranspiration - Solar radiation - And more...

Usage¶

Basic Usage¶

from hydrodataset.camels_gb import CamelsGb
from hydrodataset import SETTING

# Initialize dataset
data_path = SETTING["local_data_path"]["datasets-origin"]
ds = CamelsGb(data_path)

# Get basin IDs
basin_ids = ds.read_object_ids()
print(f"Number of basins: {len(basin_ids)}")

# Check available features
print("Static features:", ds.available_static_features)
print("Dynamic features:", ds.available_dynamic_features)

# Read timeseries data
timeseries = ds.read_ts_xrdataset(
    gage_id_lst=basin_ids[:5],
    t_range=ds.default_t_range,
    var_lst=["streamflow", "precipitation"]
)
print(timeseries)

# Read attribute data
attributes = ds.read_attr_xrdataset(
    gage_id_lst=basin_ids[:5],
    var_lst=["area", "p_mean"]
)
print(attributes)

Reading Specific Variables¶

# Read with specific time range
ts_data = ds.read_ts_xrdataset(
    gage_id_lst=basin_ids[:10],
    t_range=["1990-01-01", "1995-12-31"],
    var_lst=["streamflow", "precipitation", "temperature_mean"]
)

# Read basin area
areas = ds.read_area(gage_id_lst=basin_ids[:10])

# Read mean precipitation
mean_precip = ds.read_mean_prcp(gage_id_lst=basin_ids[:10])

Data Sources¶

The dataset supports multiple data sources for certain variables. Check the class documentation for available sources and use tuple notation to specify:

# Request specific data source
ts_data = ds.read_ts_xrdataset(
    gage_id_lst=basin_ids[:5],
    t_range=["1990-01-01", "1995-12-31"],
    var_lst=[
        ("precipitation", "era5land"),  # Specify ERA5-Land source
        "streamflow"  # Use default source
    ]
)

API Reference¶

`hydrodataset.camels_gb.CamelsGb` ¶

Bases: HydroDataset

CAMELS_GB dataset class extending RainfallRunoff.

This class provides access to the CAMELS_GB dataset, which contains hourly hydrological and meteorological data for various watersheds.

Attributes:

Name	Type	Description
`region`		Geographic region identifier
`download`		Whether to download data automatically
`ds_description`		Dictionary containing dataset file paths

Source code in hydrodataset/camels_gb.py

class CamelsGb(HydroDataset):
    """CAMELS_GB dataset class extending RainfallRunoff.

    This class provides access to the CAMELS_GB dataset, which contains hourly
    hydrological and meteorological data for various watersheds.

    Attributes:
        region: Geographic region identifier
        download: Whether to download data automatically
        ds_description: Dictionary containing dataset file paths
    """

    def __init__(
        self, data_path: str, region: Optional[str] = None, download: bool = False
    ) -> None:
        """Initialize CAMELS_GB dataset.

        Args:
            data_path: Path to the CAMELS_GB data directory
            region: Geographic region identifier (optional)
            download: Whether to download data automatically (default: False)
        """
        super().__init__(data_path)
        self.region = region
        self.download = download
        self.aqua_fetch = CAMELS_GB(data_path)

    @property
    def _attributes_cache_filename(self):
        return "camels_gb_attributes.nc"

    @property
    def _timeseries_cache_filename(self):
        return "camels_gb_timeseries.nc"

    @property
    def default_t_range(self):
        return ["1970-10-01", "2015-09-30"]

    # get the information of features from dataset file"CAMELSGB_EIDC_SupportingDocumentation"
    _subclass_static_definitions = {
        "p_mean": {"specific_name": "p_mean", "unit": "mm/day"},
        "area": {"specific_name": "area_km2", "unit": "km^2"},
        "gauge_lat": {"specific_name": "lat", "unit": "degree"},
        "gauge_lon": {"specific_name": "long", "unit": "degree"},
        "elev_mean": {"specific_name": "elev_mean", "unit": "m"},
        "pet_mean": {"specific_name": "pet_mean", "unit": "mm/day"},
    }

    _dynamic_variable_mapping = {
        StandardVariable.STREAMFLOW: {
            "default_source": "hydrological",
            "sources": {
                "hydrological": {"specific_name": "q_cms_obs", "unit": "m^3/s"},
                "depth_based": {"specific_name": "q_mm_obs", "unit": "mm/day"},
            },
        },
        StandardVariable.PRECIPITATION: {
            "default_source": "meteorological",
            "sources": {
                "meteorological": {"specific_name": "pcp_mm", "unit": "mm/day"},
            },
        },
        StandardVariable.TEMPERATURE_MEAN: {
            "default_source": "meteorological",
            "sources": {
                "meteorological": {"specific_name": "airtemp_C_mean", "unit": "°C"},
            },
        },
        StandardVariable.POTENTIAL_EVAPOTRANSPIRATION: {
            "default_source": "meteorological",
            "sources": {
                "meteorological": {"specific_name": "pet_mm", "unit": "mm/day"},
                "with_interception": {
                    "specific_name": "pet_mm_intercep",
                    "unit": "mm/day",
                },
            },
        },
        StandardVariable.RELATIVE_HUMIDITY: {
            "default_source": "meteorological",
            "sources": {
                "meteorological": {"specific_name": "rh_%", "unit": "g/kg"},
            },
        },
        StandardVariable.SOLAR_RADIATION: {
            "default_source": "meteorological",
            "sources": {
                "meteorological": {"specific_name": "solrad_wm2", "unit": "W/m^2"},
            },
        },
        StandardVariable.LONGWAVE_SOLAR_RADIATION: {
            "default_source": "meteorological",
            "sources": {
                "meteorological": {"specific_name": "lwsolrad_wm2", "unit": "W/m^2"},
            },
        },
        StandardVariable.WIND_SPEED: {
            "default_source": "meteorological",
            "sources": {
                "meteorological": {"specific_name": "windspeed_mps", "unit": "m/s"},
            },
        },
    }

`default_t_range` `property` ¶

`init(data_path, region=None, download=False)` ¶

Initialize CAMELS_GB dataset.

Parameters:

Name	Type	Description	Default
`data_path`	`str`	Path to the CAMELS_GB data directory	required
`region`	`Optional[str]`	Geographic region identifier (optional)	`None`
`download`	`bool`	Whether to download data automatically (default: False)	`False`