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2.7. A watershed has the following

characteristics:

A = 2500 ac,

L = 3.9 mi.,

S = 52 ft/mi.,

y=1%.

The channel is lined with con-

crete.

The watershed is a residential

area with 1/4-ac lots. The soil is

categorized as soil group B. As-

sume that the average watershed

slope is the same as the channel

slope. Determine the UH for this

area for a storm duration of 1 hr

using the SCS triangular UH

method.

Fig: 1