Document Type : Original Article


1 Department of Hydraulic and Water Resources Engineering, University of Gondar, Gondar, Ethiopia

2 School of Civil and Water Resources Engineering, Bahir Dar University (BIT), Bahir Dar, Ethiopia


With urbanization impervious surfaces increase, drainage pattern changes, overland flow becomes speedy, flooding and environmental problems such as land degradation increases. The objective of this study is to evaluate the hydraulic performance of storm water drainage system of the study area. The drainage channels are filled with or blocked by silt and garbage, the blockage of drainage structures is due to flat areas and siltation of drainage system which leads to failures on roadways.  Spatial analyses were conducted using Arc GIS, Bentley Flow master, Google Earth pro and Auto CAD software’s as analytical tools. The hydrological analysis was computed by rational method. The existing depth and width of the storm water drainage channel were measured for all sub catchments of the town and used to determine the existing drainage capacity using Bentley Flow master. The existing condition drainage channel depths of sub-catchments 6,7 and 8 increased by 68.40%, 160.20% and 121.07%; and the widths by 55.44%, 116.83% and 100.98%, and the design discharge was also 9.29m3/s, 16.47m3/s and 9.13m3/s, respectively. Therefore, this study recommends improvement in the integration of road and drainage structure; integration of solid waste management system in order to prevent the over flowing of storm water as a result of blockage of drains; the stations of the road requires proper maintenance and suitable measures should be taken in order to make the road and storm water drainage structures serve for the intended purposes sustainably to the stakeholders.


1.     Adugna, D., Lemma, B., Jensen, M.B. and Gebrie, G.S., 2019. Evaluating the hydraulic capacity of existing drain systems and the management challenges of stormwater in Addis Ababa, Ethiopia. Journal of Hydrology: Regional Studies, 25, pp.1-15.
2.     Chaudhuri, K., 2018. Study of storm and sewer drains for rajarhat (ward no 4) in west bengal using sewergems software. Thesis for Master of Engineering in Water Resources and Hydraulic Engineering, Jadavpur University, India.
3.     Noel, P., and Shah, Jagruti., 2019. Critical Review on Smart Systems adopted in Stormwater Drainage Design. Global Research and Development Journal, 4(9), pp.125-127.
4.     Pawar, P., Pawar, R.P., Shende, U.B. and Kanoje, P., 2018. Storm Water Management at Approach Road Miet Bhandara. International Research Journal of Engineering and Technology, 5(9), pp.588-594.
5.     Patel, K., Patel, K., Patel, R., Trivedi, K. and Patel, D.M., 2017. Storm Water Drainage for Underpass. International Journal for Innovative Research in Science & Technology, 3(9), pp.23-29.
6.     Patel, K.H. and Bhatt, B.V., 2017. Analyses of two existing stormwater drainage lines of surat in west zone using bentley stormcad. Journal of Emerging Technologies and Innovative Research, 4(5), pp. 42-45.
7.     Thiagarajan, M., Newman, G. and Van Zandt, S., 2018. The Projected Impact of a Neighborhood-Scaled Green-Infrastructure Retrofit. Sustainability, 10(10), pp.1-13.
8.     Nora, M.B. and Reddy, K.N.S., 2018. Performance Assessment of Road Drainage Systems of Burayu Town, Oromia Region, Ethiopia. International Journal of Research in Engineering and Management, 2(2), 40-55.
9.     Subramanian, T.S., Cheyapalan, T., Selvaraj, T. and Mariappan, V.N., 2014. Mapping Storm Water Sewer System and using GIS. Journal of Advanced Research in Civil and Environmental Engineering, 1(3&4), pp.23- 32.
10.   Fagan, C., 2015. Introduction to Bentley FlowMaster CE 365K, Hydraulic Engineering Design. maidment/CE365KSpr15/Bentley/FlowMaster.pdf.
11.   Subramanya, K., 2013. Engineering Hydrology. 4th Edition, Tata McGraw-Hill Education.
12.   Ethiopian Roads Authority, 2013. Drainage Design Manual. Federal Democratic Republic of Ethiopia.
13.   Chow, V.T., 1964. Handbook of applied hydrology.McGraw- Hill Book Company International Editions.
14.   Desai, M. and Patel, J.N., 2016. An Advanced GIS based Storm Water Drainage Networking Design for Bhimrad Area of Surat City (India). International Journal of Earth Sciences and Engineering, 9(3), pp.221-228.