Volume : 2, Issue : 4, April - 2013

Analysis of Rainfall Data and Design of Storm Water Drainage System in an Urban Area

Priyanka D. Harpalani, R. B. Khasiya, Dr. P. G. Agnihotri

Abstract :

Rainfall data available from 1969 to 1983 are with duration of 5,10,15,30,45,60,75,90 minute. And analysis rainfall data is carried for year 1969 to 1983 and one year flood frequency is calculated. Latest rainfall data of 2001 to 2010 are available with duration of 60 minute and other minute’s data are found by correlating with past data and one year flood frequency of latest data of 2001 to 2010 is calculated. Rational method is used for estimating runoff from catchment. Different curves of rainfall intensity vs duration, runoff coefficient vs duration, 10Ci vs duration are derived for city of Surat. And design of drain is carried with help of Manning’s chart in study area.