To completely capture linear flow travelling along a gutter perpendicular to a curb inlet, the inlet must be of width<ref>Chin, D.A. (2012), Water-Resources Engineering (3rd Edition), ISBN-13: 978-0132833219</ref>::
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To completely capture linear flow travelling along a gutter perpendicular to a curb inlet, the inlet must be of width<ref>U.S. Department of Transportation, Federal Highways Administration. 2013. “URBAN DRAINAGE DESIGN MANUAL.” https://www.fhwa.dot.gov/engineering/hydraulics/pubs/10009/10009.pdf.[[Media:USFHWA 2009.pdf]]</ref>::