Assessment of drainage capacity of a surface drain in Rajshahi, Bangladesh

Abstract

The drainage capacity of a community is essential for promoting environmental resilience, effective water management, and fostering a healthy urban lifestyle. The surface drains in Rajshahi City receive a mix of waste, including sanitary wastewater, stormwater runoff, and solid waste from roadsides and households. To improve the drainage facilities of Rajshahi, some new drains have been constructed. This study considered a recently constructed drain in the Rajshahi City Corporation (RCC), running from Talaimari to Chowddopai. The primary objective of this study is to assess the drainage capacity of this drain during both dry and monsoon seasons, ensuring its capability to contain the generated waste. Additionally, the investigation encompasses observing the sludge depth, and clear space of the drain. A field survey was conducted, employing a measuring rod and scale to precisely measure the depth, width, and sludge accumulation. The results show that the total volume of the drainage system is 117670 ft³, while the total volume of solid deposition is 6287.60 ft³. Solid deposition occupies 95% of the entire drainage path, leaving 5% as clear space. The total solid deposition volume represents approximately 5.34% of the total volume of the drainage system (6287.60 ft³ of 117670 ft³). This study revealed that during typical rainfall intensity in Rajshahi City, the portions of drains from Talaimari to Octroimor and from Rajshahi University main gate to Chowddopai have sufficient open space to prevent water overflow, but the capacity of the drains in the portion between Kajla and Rajshahi University main gate is inadequate.

Keywords

• Surface drains
• drainage capacity
• sludge depth
• clear space

References

1. M. M. E. Zumrawi, ‘International Journal of Multidisciplinary and Scientific Emerging Research The Impacts of Poor Drainage on Road Performance in Khartoum’, 2014.
2. G. Kebede Warati, ‘Assessment of the Effect of Urban Road Surface Drainage: A Case Study at Ginjo Guduru Kebele of Jimma Town’, International Journal of Science, Technology and Society, vol. 3, no. 4, p. 194, 2015.
3. C. O. Owuama, ‘Sustainable Drainage System for Road Networking’, International Journal of Innovation, Management and Technology, vol. 5, no. 2, 2014.
4. V. Stovin, R. Quinn, and C. Rouge, ‘Study of Continuous Simulation Supporting Multiple Design Criteria for Sustainable Drainage Systems’, Journal of Sustainable Water in the Built Environment, vol. 9, no. 3, Aug. 2023.
5. C. Chapman and J. W. Hall, ‘The influence of built form and area on the performance of sustainable drainage systems (Suds)’, Future Cities and Environment, vol. 7, 2021.
6. K. Frost and M. Scholz, ‘Capacity Down Pipe: Comparisons with Other Sustainable Drainage Systems’, Science Discovery, vol. 3, no. 1, pp. 7–17, 2015.
7. Y. Shen, Y. de Li, W. jun Huang, H. dong Xu, and P. fei Hu, ‘Vertical drainage capacity of new electrical drainage board on improvement of super soft clayey ground’, Journal of Central South University, vol. 22, no. 10, pp. 4027–4034, Oct. 2015.
8. J. Pablo, R. Sánchez, J. Hathaway, E. A. Barragán, C. Chapman, and J. W. Hall, ‘The potential for sustainable drainage systems (SuDS) in a regional urbanization project’, 2030.

9. B. G. Sockness and K. B. Gran, ‘An experimental study of drainage network development by surface and subsurface flow in low-gradient landscapes’, Earth Surface Dynamics, vol. 10, no. 3, pp. 581–603, Jun. 2022, doi: 10.5194/esurf-10-581-2022.
10. G. E. Tucker and R. L. Bras, ‘Hillslope processes, drainage density, and landscape morphology’, Water Resources Research, vol. 34, no. 10, pp. 2751–2764, 1998.
11. J. Pešková and J. Štibinger, ‘Computation method of the drainage retention capacity of soil layers with a subsurface pipe drainage system’, Soil and Water Research, vol. 10, no. 1, pp. 24–31, 2015.
12. Q. Zhou, T. E. Panduro, B. J. Thorsen, and K. Arnbjerg-Nielsen, ‘Adaption to extreme rainfall with open urban drainage system: An integrated hydrological cost-benefit analysis’, Environmental Management, vol. 51, no. 3, pp. 586–601, Mar. 2013.
13. H. Q. Peng, Y. Liu, H. W. Wang, and L. M. Ma, ‘Assessment of the service performance of drainage system and transformation of pipeline network based on urban combined sewer system model’, Environmental Science and Pollution Research, vol. 22, no. 20, pp. 15712–15721, Oct. 2015.
14. M. A. Ashraf and M. S. A. Chowdhury, ‘Drainage Planning in the Cities of Bangladesh: Case Study of Drainage and Water Logging in Chaktai Commercial area, Chittagong’, Journal of Bangladesh Institute of Planners, vol. 2, pp. 49–60, Jan. 1970.
15. I. Faridatul and S. Jahan, ‘People’s Perception Regarding the Development of Community Facilities: A Case Study of Rajshahi City Corporation’, 2014.
16. M. S. Islam, S. M. Islam, and A. M. Islam, ‘Assessment of efficacy of drainage system in Rajshahi City Corporation, Bangladesh’, Advances in Environmental Research, vol. 10, no. 2, pp. 105–116, 2021.
17. M.M.M.N. Ullah, M.S. Hossain, M. Shahiduzaman, M.S. Islam, M.Z. Islam, M.S.R. Choudhary, “A study on some aspects of drainage system in Rajshahi city, Bangladesh’, Scientific Journal of Environmental Sciences, no. 2, pp. 118–124, 2013.
18. N. Md. Bari, A. Chowdhury, J. Islam, M.M. Alam, M. Munni, S. Hasan, M. Shahorian, M.K.A. Limon, ‘Study on the characteristics of drainage liquid wastes and diposited drainage solids of Rajshahi City’, 2024.