Storm water inlets are devices used to collect runoff and discharge it to an underground storm drainage system. Inlets are suitably located on pavements, in gutter sections, paved medians, roadside and at locations of specific requirement
Types of inlets
i. Grate inlets
Grate inlets are horizontal openings covered with one or more suitable gratings through which the flow passes.
ii. Kerb inlet
Kerb inlets are vertical openings in the road kerb when they are equipped with the diagonal notches cast into the gutter along the kerb opening to form a series of ridges or deflectors. Such inlets are suitable where heavy traffic is expected.
iii. Combination inlets
Combined grate and kerb inlets are more efficient. These are compound of a kerb and gutter inlet acting as a single inlet.
Catch basin
The catch basin illustrated in Figure is a special type of inlet structure designed to retain sediment and debris transported by storm water which might enter into storm water system and clog the storm pipes.
A separate catch basin may be used for each or at alternate of every 3 street inlet to further save expenses, the pipes from several outlets at a corner may discharge into the same catch basin. Catch basin sumps require periodic cleaning to be effective and if not properly maintained, they may become odorous and mosquito nuisance.
Urban Infrastructure and Network Study notes for M. plan Sem-III
Urban Infrastructures & Network.pdf
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