Dear Colleagues:

One of my coworkers is modeling water temperature for an urban stream
that may soon be converted to a lovely concrete flood channel sized to
accomodate a 100-yr flood.  Part of this conversion will involve
ripping out all of the riparian vegetation (to decrease roughness).
Does anyone have any advice on how to quantify the effect this
conversion will have on water temperature under low flow conditions?
Water depth and shading effect (relative to air temp at nearby airport
reference station) are in the model now; but he does not have effect of
riparian vegetation on local air temp nor the heating effect of the
concrete mat compared to natural substrate.

Thanks in advance and all the best for the coming New Year.

Erwin

Erwin Van Nieuwenhuyse
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letter 'l').