Developing a design rainfall intensity equation using measurement data from the Ha Dong meteorological station in Hanoi, Vietnam

  • Ha Xuan Anh Faculty of Urban Environment and Infrastructure Engineering, Hanoi Architectural University, Km 10, Nguyen Trai street, Thanh Xuan district, Hanoi, Vietnam
  • Tran Thi Viet Nga Faculty of Environmental Engineering, Hanoi University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam
  • Nguyen Van Nam Faculty of Urban Environment and Infrastructure Engineering, Hanoi Architectural University, Km 10, Nguyen Trai street, Thanh Xuan district, Hanoi, Vietnam
DOI: https://doi.org/10.31814/stce.huce2025-19(1)-05
Keywords: design rainfall intensity, intensity-duration-frequency curves, probability distribution functions, rainwater drainage systems

Abstract

In the design and calculation of stormwater drainage systems, the design rainfall intensity plays a crucial role and is widely used in runoff calculations. Due to the influence of local climatic factors, the selection of probability distributions for rainfall frequency analysis and the methods used to determine parameters for empirical equations result in a variety of equations compared to traditional Rainfall Intensity-Duration-Frequency curves. This paper focuses on developing a design rainfall intensity equation based on observed rainfall data from the Ha Dong meteorological station in Hanoi. The Generalized reduced gradient nonlinear method was applied to derive the equation. The results indicate that the proposed equation aligns more closely with Rainfall IntensityDuration-Frequency curves. The methods introduced in this paper can be effectively applied to develop design rainfall intensity equations for other urban areas, providing valuable support for the design of urban stormwater drainage systems.

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Published
25-03-2025
How to Cite
Xuan Anh, H., Thi Viet Nga, T., & Van Nam, N. (2025). Developing a design rainfall intensity equation using measurement data from the Ha Dong meteorological station in Hanoi, Vietnam. Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE, 19(1), 47-58. https://doi.org/10.31814/stce.huce2025-19(1)-05
Issue
Vol 19 No 1 (2025)
Section
Research Papers

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