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Street Stormwater Storage Capacity

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The primary function of a street is to maintain the movement of traffic. Under the assumption that street drainage will be designed to collect stormwater as fast as possible, the street stormwater capacity has been defined as its hydraulic conveyance, estimated by Manning's formula. This practice has resulted in a prevailing experience that street intersections are often flooded. This study presents an investigation on street hydraulic capacity. It is found that the street stormwater capacity at a sump is in fact dictated by the storage capacity rather than the conveyance capacity. A new design methodology is developed in this study to consider the street depression storage as a criterion when sizing a sump inlet. Design parameters required by this method include the local intensity–duration–frequency information, catchment area, runoff coefficient, street transverse slope, and the configuration of the sump area as a fraction of a circle.
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Keywords: DEPRESSION; RUNOFF; STORAGE; STORMWATER; STREET; SUMP; WATER SPREAD

Document Type: Research Article

Publication date: 2000-09-01

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  • Water Environment Research (WER) is published monthly, including an annual Literature Review. A subscription to WER includes access to the latest content back to 1992, as well as access to fast track articles. An individual subscription is valid for 12 months from month of purchase.

    Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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