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Curve Numbers for Specific Land Uses

Curve Numbers for Specific Land Uses

Curve Numbers for Specific Land Uses

(OP)
Has anyone seen a curve number table that assigns curve numbers to speciic land use categories?  I've googled it, but only found the basic TR-55 list that says for example
          A        B         C       D
Woods     36       60      73      79  for fair coverage.


but what I need is

deciduous wooded wetlands
mixed forest (>50% coniferous with 10-50% crown closure)
athletic fields


and so on.  It is really taking me a long time to decide where on the so basic list in TR-55 that each one pertains.

Perhaps someone has already done this?

RE: Curve Numbers for Specific Land Uses

I would determine which CN fit each different use best and then use a weighted average.  There does seem to be some amount of judgement as the items in the TR-55 don't always directly correspond to actual conditions.

RE: Curve Numbers for Specific Land Uses

Depends on the type of vegetation on the forest floor,the slope of the forest floor, and the soil codition (dry, moist, wet).
Any CN you use will be an engineering estimate.
Flip a coin. Heads = 40, tails = 60.

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