We model soil-plant-farmer-atmosphere interactions at daily resolution but great variance in precipitation intensity is observable at hourly resolution - especially at warm temps (convective precip. / thunderstorms) - see Haerter & P. Berg Nature Geoscience 2, 372 - 373 (2009)
For example, If conductivity is 24 cm/day then it is 1 cm/hour - So if 10 cm of rain fall in one hour - (which is not uncommon during German summers) - 9 cm will likely be runoff - but at daily resolution in a naive model, the 10 cm are distributed throughout the day and all of it infiltrates the soil.
Though it seems one should always avoid tampering with weather data, I propose "removing" some precipitation, considering it automatic runoff based on slope, conductivity and other explanatory weather variables. Suggestions, ideas?
The obvious answer is to use at least hourly rain! When unavailable, you may try reasonable rain duration and frequency statistics to feed the soil.
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