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shade reduction factor

Sat, 07/21/2018 - 6:32am — Chenxi
Dear all, currently I calibrated the water temperature in a Germany reservoir. I found that the simulated water temperature in winter is much lower than the observation. I try to change the wind factor, ice parameter, light extinction factor and so on. Finally I found that if I increased the "DynSh" to higher than 1 in the shade file (e.g. 1.2), the results in winter is much better than before. However, in the manual, it is said that the DynSh should be between 0-1.... I want to know that whether it is an approiprate way to increase the DynSh higher than 1? Does the DynSh is just like the data in wsc file which is only a simple multiplied factor? Many thanks for the kind help!!
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Hydrodynamics
Tue, 07/31/2018 - 10:31am — Annett

I wouldn't recommend increasing DynSh greater than 1. Besides the temperature parameters that you looked at, it might be worth rechecking bathymetry (does volume and surface area of the grid match measured values?), input data, meteorology, etc. For instance, if your experiments with shade parameters are indicating that increasing the solar energy to the reservoir helps the calibration, I'd revisit the solar data... look for inconsistencies, compare measured values of your met. site to values at nearby sites, compare to theoretical solar values on cloudless days, etc. Or if you are using cloud cover vs solar radiation, that is another dataset to revisit.