unifhycontrib.smart

class unifhycontrib.smart.SurfaceLayerComponent

The Soil Moisture Accounting and Routing for Transport [SMART] model (Mockler et al., 2016) is a bucket-type rainfall-runoff model.

SMART is an enhancement of the SMARG (Soil Moisture Accounting and Routing with Groundwater) lumped, conceptual rainfall–runoff model developed at National University of Ireland, Galway (Kachroo, 1992), and based on the soil layers concept (O’Connell et al., 1970; Nash and Sutcliffe, 1970). Separate soil layers were introduced to capture the decline with soil depth in the ability of plant roots to extract water for evapotranspiration. SMARG was originally developed for flow modelling and forecasting and was incorporated into the Galway Real-Time River Flow Forecasting System [GFFS] (Goswami et al., 2005). The SMART model reorganised and extended SMARG to provide a basis for water quality modelling by separating explicitly the important flow pathways in a catchment.

The surface layer component of SMART consists in meeting the potential evapotranspiration demand either with rainfall alone under energy-limited conditions or with rainfall and soil moisture under water-limited conditions – throughfall is only generated under energy-limited conditions. Note, unlike the original SMART model, this component calculates the available soil moisture from the soil water stress coefficient provided by the sub-surface component – in the original SMART model, the available soil moisture is iteratively depreciated with soil layer depth. This unavoidable simplification may overestimate the soil moisture available compared to the original SMART model.

Contributors

Thibault Hallouin [1,2], Eva Mockler [1,3], Michael Bruen [1]

Affiliations

1. Dooge Centre for Water Resources Research, University College Dublin

2. Department of Meteorology, University of Reading

3. Ireland’s Environmental Protection Agency

Licence

GPL-3.0

Copyright

2020, University College Dublin

Inputs

name

rainfall_flux

units

kg m^-2 s^-1

kind

dynamic

name

potential_water_evapotranspiration_flux

units

kg m^-2 s^-1

kind

dynamic

Inwards

name

soil_water_stress_for_transpiration

units

1

from

subsurface

method

mean

Outputs

name

actual_water_evapotranspiration_flux

units

kg m^-2 s^-1

Outwards

name

canopy_liquid_throughfall_and_snow_melt_flux

units

kg m^-2 s^-1

to

subsurface

method

mean

name

transpiration_flux_from_root_uptake

units

kg m^-2 s^-1

to

subsurface

method

mean

Parameters

name

theta_t

description

rainfall aerial correction factor

units

1

name

theta_z

description

effective soil depth

units

kg m^-2

SpaceDomain Properties

name

land_sea_mask

required

False

name

flow_direction

required

False

name

cell_area

required

False