Gutter Spread Spreadsheet

The sag worksheet xls 60 kb uses the procedure described in the wsdot hydraulics manual to locate inlets in a sag condition.

Gutter spread spreadsheet.

Triangle or multi triangle. The spreadsheet calculates the minimum size of a vta to balance both the site s contributing water runoff and delivered nutrients. Scuppers are the recommended method of deck drainage because they can reduce the problems of transporting a relatively large concentration of runoff in an area of generally limited right of way. Minutes see hydraulics manual 2 5 3 runoff coefficients for rational method.

Spread geometry and calculations a curb and gutter combination forms a triangular channel that can carry runoff without interrupting traffic. The ponded width is a geometric function of the depth of the water y in the curb and gutter section. Allowable width of flow flow spread or zd allowable 0 1 cfs maximum flow allowed to bypass last inlet qbp if flow is slow enough and gutter is flat spreadsheet allows more flow into inlet automatically done for you flow spreads these equations show the depth of flow as a function of gutter. Create a new spreadsheet and edit it with others at the same time from your computer phone or tablet.

Appendix 9c 9 velocity in triangular gutter sections. Gutter spread should be checked to ensure a safe reasonable design. The larger of the two calculations must be used to balance both the annual runoff and delivered nutrients. This spreadsheet calculates the spread width of flow gutter velocity and bypass flow for an inlet installation on a continuous run.

See hydraulics manual 2 5 2 rainfall intensity inch hr see hydraulics manual 2 5 4. Appendix 9c 8 ratio of frontal flow to total gutter flow. The spread is usually referred to as ponded width t as shown in figure 10 10. Free with a google account.

However the use of scuppers should be evaluated for site specific concerns. Gutter spread gutter spread calculations are required for the driveway if curb and gutter or header curb is used table 6 1 general requirements of hydrology reports separate drainage calculations must be provided for the pre developed condition and for the proposed development. Spread for a given peak flow q value depends on the type of gutter section used.