Kansas Administrative Regulations
Agency 5 - DEPARTMENT OF AGRICULTURE-DIVISION OF WATER RESOURCES
Article 40 - DESIGN OF EARTH DAMS
Section 5-40-32 - Determination of rainfall excess
Universal Citation: KS Admin Regs 5-40-32
Current through Register Vol. 43, No. 39, September 26, 2024
(a) Rainfall excess shall be determined by using the natural resource conservation service (NRCS) runoff curve number method.
(b) The antecedent moisture condition (AMC) to be used when determining the curve number for the design storm shall be one of the following:
(1) For zone one, the curve
number determined using AMC III;
(2) for zone two, the curve number determined
by averaging the AMC II and AMC III curve numbers; or
(3) for zone three, the curve number
determined using AMC II.
Zone one, zone two, and zone three shall have the meanings specified in K.A.R. 5-40-1 under the definition of a "stream."
(c) If the drainage basin is in two zones, the curve number may be weighted based on the drainage area within each zone.
(d) AMC II shall be used in determining the rainfallrunoff relationship used to compute the required detention storage.
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