Difference between revisions of "Curb cuts"

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<math>W_T=0.817\times(0.08)^{0.42}\times(0.02)^{0.3}\left (\frac{1}{0.013\times0.03}\right)^{0.6}=9.71\ m</math>
<math>W_T=0.817\times(0.08)^{0.42}\times(0.02)^{0.3}\left (\frac{1}{0.013\times0.03}\right)^{0.6}=9.71\ m</math>
   
   
 
The proportion of water entering the bioretention cell under these flow conditions would be::
<math>R_c=1-\left ( 1-\frac{3}{9.71} \right )^{1.8}</ma


==Curb cuts Gallery==
==Curb cuts Gallery==

Revision as of 01:15, 29 September 2017

Sizing[edit]

To completely capture linear flow travelling along a gutter perpendicular to a curb inlet, the inlet must be of width::

Where the intention is to capture only a proportion of the flow, the ratio of flow entering the curb inlet may be calculated::

Example[edit]

A curb cut of 3 m is proposed as an inlet for an offline bioretention cell receiving runoff from an adjacent roadway. The gutter and the curb are made from smooth concrete with Manning's 'n' = 0.013. The x-slope is 3% and the longitudinal slope of the road is 2%. The design storm produces flow of 0.08 m3/s.

The width of inlet to capture 100% of this flow is::

The proportion of water entering the bioretention cell under these flow conditions would be:: <math>R_c=1-\left ( 1-\frac{3}{9.71} \right )^{1.8}</ma

Curb cuts Gallery[edit]