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Following rules may be observed while locating storm water inlets: •Inlets are constructed from the uppermost point of the gutter section, successively spaced by locating the point where, some of the bypassing flow and the flow from the additional contributing […]

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. […]

Design of Gutters Gutter Flow calculations are necessary to establish the spread of water on the shoulder, parking lane, or pavement section. Streets with uniform cross slopes like that shown in Figure 5.4 are found in urban areas. Since the […]

Gutter A pavement gutter is defined as a section of pavement adjacent to the roadway which conveys water during a storm runoff event. It may include a portion or all of a travel lane. Gutter sections usually have a triangular […]

The conveyance of a channel section of a given area increases with a decrease in its perimeter. Hence a channel section having the minimum perimeter for a given area of flow provides the maximum value of the conveyance. With the […]

Critical flow condition develops when Froude no equals to 1.0. In open channel flow design, critical state of flow should be avoided as under such condition the water surface becomes unstable and wavy. It is, therefore, recommended that the open […]

1. Reynolds’s number For open channel flow of any cross section: Re = VR / ν For flow in pipe of diameter D Re = VD / ν Where, Re : Reynold’s Number (Dimensionless) V : Cross- sectional mean velocity […]

Storm water flows in Channels and Conduits Storm water flows in channels/ conduits in contact with atmospheric air is said to be an open channel flow or free-surface flow. If the rate of discharge remains constant with time at a […]

The essential requirement for designing of Storm Water Drainage system is the proper estimation of storm runoff to downstream drains or the point of disposal. It has a bearing on optimizing the cost of infrastructure as well as its performance. […]

In storm water drainage system design, estimation of runoff from the tributary catchment reaching various inlets of the drain is important. This can be estimated if Intensity Duration Frequency (IDF) curves are available. The IDF curve is drawn based on […]