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<br />the overflow was minor and of little consequence, lea to
<br />~odelling the reach with the assumption that the flow was
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<br />tinally, the flood~lain delineation from Sunsct Strcet to
<br />Hollywood Street was somewhat conserviltively subjective. This
<br />reach lacks not only an existing channel but also any signifi-
<br />cant topographic definition illong the length of the cross-
<br />sections to direct runoff. The general topography of the reach
<br />causes runoff to flow east and very localized depressions and
<br />swales cause the ~jor storm runoff to switch fro~ one swale to
<br />another. In the face of this difficulty, the floodplain was
<br />intentionally drawn large so as to include the actual flood
<br />limits though there may well be unimmdated land in the
<br />floodplain shown.
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<br />Normally the hydraulic evaluation would include delineation
<br />of a floodway!8) A floodway indicates the deqree of encroach-
<br />ment that if, reqllired to raise the local water surface a given
<br />distance. As describ€d in the hydrology section of this report,
<br />channel storaqc hilS an overwhelminq effect on downstream
<br />discharge and thus downstream depth. FlOOd fringc encro3ch-
<br />ment would tend to re-channelize divergent flo~s. Determining
<br />equitable allowable encroachment when upstream changes could
<br />affect all reaches downstream from the encroachment is considered
<br />to be beyond the scope of this study.
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