Surface drainage, Civil Engineering

Surface Drainage:

Surface drainage deals with arrangement for quickly leading the water from rainfall away from the surface of pavements, shoulders, slopes of embankments and cuts. The rain water falling on the pavement and shoulders is lead away by providing a suitable camber on a single carriageway road or cross-fall on a dual carriageway road (Figure).

1332_Surface Drainage.png

Figure (a) : Camber on single Carriageway Road

 

812_Surface Drainage1.png

Figure (b): Cross-fall on Dual Carriageway Road

The values of camber/cross-fall normally followed in India are given in Table 1.

Table : Values of Camber

1834_Surface Drainage2.png

The shoulder is provided with a slope 0.5-1.0 percent steeper than the camber/cross-fall of the pavement.

The run-off is dependent on the intensity of rainfall. The formula used is:

Q = 0.028 PIc A

where  Q = Run-off in cu m per sec,

P = Coefficient of run-off depending upon the nature of surface having values ranging from 0.40 for permeable surfaces to 0.90 for concrete or dense bituminous surfaces,

Ic = Critical intensity of storm in cm per hour, and

A = Catchment area in hectares.

Posted Date: 1/22/2013 5:16:43 AM | Location : United States







Related Discussions:- Surface drainage, Assignment Help, Ask Question on Surface drainage, Get Answer, Expert's Help, Surface drainage Discussions

Write discussion on Surface drainage
Your posts are moderated
Related Questions
Question What is sign of shear slump and collapse slump in slump tests? Answer There are three varieties of slump that might occur in slumps test, specifically, slump, shear

Non-distortional Prestressing Concrete members deflect due to their own self weight. If prestressing force is applied in such a way that these deflections are eliminated due to

The liquid limit of a clay soil is 56% and its plasticity index is 15%.  (a) Name the state of consistency is this material at a water content of 45% ? (b) Determine the plas

what is the manufacturing process of regular portland cement


what is door and window sizes

Define the Thiem Equations for Confined Aquifers   Using natural log:  Q = 2ΠKm(h 2 - h 1 )/ln(r 2 /r 1 )      m = aquifer thickness (ft) Using log 10 :   Q = 2Km(h 2 - h

Instruments used in chain survey

Pre-tensioning systems In the previous unit we have seen different steps in a pretensioning operation. Tendon wires or strands (formed as a rope type arrangement made of  sever

WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF TIMBER FOR CIVIL ENGINEERING