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6.3. Differences between SUEWS and LUMPS#
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.
LUMPS |
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 |
6.4. Differences between SUEWS and FRAISE#
FRAISE, Flux Ratio – Active Index Surface Exchange scheme, 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] for further details.
Topic |
FRAISE |
LUMPS |
SUEWS |
|---|---|---|---|
Complexity |
Simplest |
Moderate |
More complex |
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) Calculates active surface |
hourly |
5 min-hourly-annu al |
Unique features |
Calculates active surface and fluxes |
Radiation and energy balances |
Radiation, energy and water balance (includes LUMPS) |