SUSTAINABLE STORM WATER DRAINAGE SYSTEM DESIGN FOR SYLHET AGRICULTURAL UNIVERSITY

M A Hossain, F Ishaque, M A R Sarker, S P Ritu and M F Hussain
Journal of the Sylhet Agricultural University, Volume 3, Issue 2, 2016, Pages 271-280

Abstract:

Drainage system of Sylhet Agricultural University is often blocked by sediment and solid waste consequences in a water-logged situation. To eradicate this problem, a study was conducted to design of sustainable storm water drainage system for Sylhet Agricultural University. The rainfall data from the secondary sources and relevant data of topography and vegetation from the primary and secondary sources were collected to endure the study. An endeavor to analyze the present scenario of drainage system in this university was accomplished through questionnaire survey, informal interview and open discussion. Hence, hydrological data analysis paves the way to design the most economical and efficient hydrologic design of drainage system. 100 years return period and 1-hour rainfall depth was estimated to prepare an Intensity-Duration-Frequency curve. The study area was dividing into three catchments based on topography. The time of concentration of 1st, 2nd, and 3rdcatchments were 5.21, 4.72 and 5.75 min., respectively. However, peak discharges of three catchments were calculated using rational formula and the values were 1.19 m3s-1, 1.2 m3s-1 and 2.2 m3s-1, respectively. Rectangular cross-sections of drains for three catchments were designed using Manning’s equation according to peak discharge. Therefore, total cost was also estimated. A proper management system for storm water drainage was also suggested to reduce the potential of flooding and clogging in the campus area.

Keywords:

Drainage system, hydrologic design, peak discharge


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M A Hossain, F Ishaque, M A R Sarker, S P Ritu and M F Hussain. 2016. SUSTAINABLE STORM WATER DRAINAGE SYSTEM DESIGN FOR SYLHET AGRICULTURAL UNIVERSITY, Journal of the Sylhet Agricultural University 3(2): 271-280.