NM CID GF-4 Practice Questions - New Mexico CID GF-4 Drainage Or Flood Control Systems Contractor Examination Exam

All else equal, which land-cover change most increases the Rational Method runoff coefficient C?

Replacing native desert range with a concrete-lined drainage channel and rooftops Replacing a paved parking lot with irrigated turf Replacing a warehouse roof with an open-graded gravel lot Replacing a storm sewer with an equivalent grass-lined swale

Correct Answer:

Replacing native desert range with a concrete-lined drainage channel and rooftops

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