Existing simplified runoff models such as SCS synthetic hydrographs give some ability to
predict surface runoff, but are generally developed for larger watersheds, and do not
necessarily represent the actual variation in flow rate with varying precipitation rate. For
the purposes of simulating runoff rate and runoff temperature from small parcels of land,
a new runoff model was developed based on Manning’s equation. The runoff model is
analytical and spatially integrated (zero-dimensional), in that flow depth, flow rate and
runoff temperature are computed at one point, the outlet. By taking into account
expected variations in the upstream flow depth, the model closely matches the
simulations results of a 1D kinematic wave model. The analytic runoff model was
coupled to a 1D soil temperature and moisture model, to enable simulation of infiltration,
runoff rate and runoff temperature.
Herb, William R.; Janke, Ben; Mohseni, Omid; Stefan, Heinz G..
An Analytic Model for Runoff and Runoff Temperature from a Paved Surface.
St. Anthony Falls Laboratory.
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