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SUEWS-related Software


SuPy is a Python-enhanced urban climate model with SUEWS as its computation core.

The scientific rigour in SuPy results is thus gurranteed by SUEWS (see :ref:`SUEWS publications <Recent_publications>` and :ref:`Parameterisations and sub-models within SUEWS`).

Meanwhile, the data analysis ability of SuPy is greatly enhanced by the Python-based SciPy Stack, notably numpy and pandas.


SUEWS can be run as a standalone model but also can be used within UMEP. There are numerous tools included within UMEP to help a user get started. The SUEWS (Simple) within UMEP is a fast way to start using SUEWS.

The version of SUEWS within UMEP is the complete model. Thus all options that are listed in this manual are available to the user. In the UMEP SUEWS (Simple) runs all options are set to values to allow intial exploration of the model behaviour.

Differences between SUEWS, LUMPS and FRAISE

The largest difference between LUMPS and SUEWS is that the latter simulates the urban water balance in detail while LUMPS takes a simpler approach for the sensible and latent heat fluxes and the water balance (“water bucket”). The calculation of evaporation/latent heat in SUEWS is more biophysically based. Due to its simplicity, LUMPS requires less parameters in order to run. SUEWS gives turbulent heat fluxes calculated with both models as an output.

Similarities and differences between LUMPS and SUEWS.

Net all-wave radiation (Q*) Input or NARP Input or NARP
Storage heat flux (ΔQS) Input or from OHM Input or from OHM
Anthropogenic heat flux (QF) Input or calculated Input or calculated
Latent heat (QE) DeBruin and Holtslag (1982) Penman-Monteith equation2
Sensible heat flux (QH) DeBruin and Holtslag (1982) Residual from available energy minus QE
Water balance No water balance included Running water balance of canopy and water balance of soil
Soil moisture Not considered Modelled
Surface wetness Simple water bucket model Running water balance
Irrigation Only fraction of surface area that is irrigated Input or calculated with a simple model
Surface cover Buildings, paved, vegetation Buildings, paved, coniferous and deciduous trees/shrubs, irrigated and unirrigated grass

FRAISE Flux Ratio – Active Index Surface Exchange

FRAISE provides an estimate of mean midday (±3 h around solar noon) energy partitioning from information on the surface characteristics and estimates of the mean midday incoming radiative energy and anthropogenic heat release. Please refer to Loridan and Grimmond (2012) [LG2012]_ for further details.

Complexity Simplest: FRAISE   More complex: SUEWS
Software provided: R code Windows exe (written in Fortran) Windows exe (written in Fortran) - other versions available
Applicable period: Midday (within 3 h of solar noon) hourly 5 min-hourly-annu al
Unique features:

Calculates active surface

and fluxes
Radiation and energy balances Radiation, energy and water balance (includes LUMPS)
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