Specifies how meteorological variables in the input file (except rain and snow) are disaggregated to the model time step.
Wind direction is not currently downscaled so non -999 values will cause an error.
Linear downscaling of averages for all variables, additional zenith check is used for Kdown. This is the default option.
Linear downscaling of instantaneous values for all variables, additional zenith check is used for Kdown.
WFDEI setting: average Kdown (with additional zenith check); instantaneous for Tair, RH, pres and U. (N.B. WFDEI actually provides Q not RH)
Can be used to switch off zenith checking in Kdown disaggregation. Note that the zenith calculation requires location information obtained from SUEWS_SiteSelect.txt. If a single met file is used for all grids, the zenith is calculated for the first grid and the disaggregated data is then applied for all grids.
No zenith angle check is applied.
Disaggregated Kdown is set to zero when zenith angle exceeds 90 degrees (i.e. sun below horizon) and redistributed over the day. This is the default option.
Specifies how rain in the meteorological forcing file are disaggregated to the model time step. If present in the original met forcing file, snow is currently disaggregated in the same way as rainfall.
Rainfall is evenly distributed among all subintervals in a rainy interval. This is the default option.
Rainfall is evenly distributed among among RainAmongN subintervals in a rainy interval – also requires RainAmongN to be set.
Rainfall is evenly distributed among among RainAmongN subintervals in a rainy interval for different intensity bins – also requires MultRainAmongN and MultRainAmongNUpperI to be set.
Specifies upper limit for each intensity bin to apply MultRainAmongN.
Any intensities above the highest specified intensity will use the last MultRainAmongN value and write a warning to Warning messages: warnings.txt.
Use with RainDisaggMethod = 102.
e.g. MultRainAmongNUpperI(1) = 0.5, MultRainAmongNUpperI(2) = 2.0, MultRainAmongNUpperI(3) = 50.0