You can check out:
Christianson, R, S. Hutchinson and G. Brown, 2015. Curve Number Estimation Accuracy on Disturbed and Undisturbed Soils, J. Hydrol. Eng..
The basic conclusion is that for disturbed soils the normal soil mapping is a poor predictor of the disturbed soil. Instead, you should measure the infiltration with a double ring and compute a CN by the method of:
Chong, S. K., and Teng, T. M.,1986. “Relationship between the runoff curve number and hydrologic soil properties.” J. Hydrol., 84(1–2), 1–7.
Of course, that isn't much help in designing before disturbance....
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Glenn Brown P.E., D.WRE, F.EWRI, M.ASCE
Oklahoma State Univ
Stillwater OK
(405) 744-8425
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Original Message:
Sent: 10-08-2015 16:02
From: Karen Kabbes
Subject: Good Reference for CN for LID applications
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Karen Kabbes P.E., D.WRE, ENV SP, M.ASCE
President
Kabbes Engineering Inc
Barrington IL
(847) 842-9663
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