unifhycontrib.artemis
- class unifhycontrib.artemis.SubSurfaceComponent
Artemis provides a simple runoff production model designed to be comparable with the runoff-production models typically embedded within climate models.
It is driven with precipitation, radiation, temperature, humidity and wind speed on a daily time step and calculates canopy interception, evaporation, snowmelt, infiltration, and runoff. It uses a Rutter–Gash canopy formulation (Gash, 1979) to represent interception, together with Penman–Monteith evaporation calculated using available radiation data (Monteith, 1965). Soil moisture is accounted for using a two-layer model with saturation-excess runoff computed using a generalized TOPMODEL (Clark and Gedney, 2008). The snowpack is represented using a temperature-based model of accumulation and melt (Moore et al., 1999, Hock, 2003, Beven, 2011). Snow accumulates when precipitation falls while temperature is below a threshold temperature. When temperature is above a threshold for melt, melting occurs at a rate proportional to the difference between the current temperature and the melting temperature. This conceptual model is widely used (Hock, 2003, Zhang et al., 2006, Rango and Martinec, 1995, Beven, 2011) and gives performance comparable with that of more parameter rich energy balance models, despite their greater complexity (Parajka et al., 2010).
The sub-surface component of Artemis comprises infiltration and runoff.
- Contributors
Simon Dadson [1,2]
- Affiliations
UK Centre for Ecology and Hydrology
School of Geography and the Environment, University of Oxford
- Licence
BSD-3
- Copyright
2020, University of Oxford
- Codebase
Inputs
- name
topmodel_saturation_capacity
- units
mm m-1
- kind
static
- name
saturated_hydraulic_conductivity
- units
m s-1
- kind
static
- name
topographic_index
- units
1
- kind
static
Inwards
- name
canopy_liquid_throughfall_and_snow_melt_flux
- units
kg m-2 s-1
- from
surfacelayer
- method
mean
- name
transpiration_flux_from_root_uptake
- units
kg m-2 s-1
- from
surfacelayer
- method
mean
Outwards
- name
soil_water_stress_for_transpiration
- units
1
- to
surfacelayer
- method
mean
- name
surface_runoff_flux_delivered_to_rivers
- units
kg m-2 s-1
- to
openwater
- method
mean
- name
net_groundwater_flux_to_rivers
- units
kg m-2 s-1
- to
openwater
- method
mean
Constants
- name
m
- description
K_sat decay constant - Marthews et al
- units
1
- default_value
2.0e-02
- name
rho_lw
- description
specific mass of liquid water
- units
kg m-3
- default_value
1.0e+03
- name
S_top
- description
soil depth over which to apply topmodel
- units
m
- default_value
3.0e+00
States
- name
subsurface_store
- units
m
SpaceDomain Properties
- name
land_sea_mask
- required
False
- name
flow_direction
- required
False
- name
cell_area
- required
False