Development of precipitation intensity-duration-frequency curves for litani river basin - Lebanon

  • Authors

    • Hilal Obeid Beirut Arab University
    • Mohamad El Kholy Beirut Arab University
  • Rainfall, Litani River, IDF Curves, Rainfall Intensity, Distribution, Rainfall Probability Distribution Semicolon.
  • Most countries in the Middle East region lack the availability of rainfall data and relationships for the rainfall durations and frequencies. In this study, the daily rainfall data collected from Lebanese Agricultural Research Institute and Beirut Airport Weather Forecast for five stations in Litani River Basin-Lebanon over a period of twenty-three years are analyzed. SCS Type II rainfall distribution was adopted for short duration intervals. Gumbel, Normal, and the Log Pearson Type III distributions are used to develop the relationship between the rainfall intensity, storm duration, and return periods. Chi-Square test is used to confirm the suitability of the fitted distributions. Results obtained using Log Pearson and Gumbel distributions are very close and are more applicable compared to that of the Normal Distribution. Also, results show that IDF equations of Kimijima and Sherman may fit well at all stations.




  • References

    1. [1] Bell, F. C. (1969): Generalized rainfall-duration-frequency relationships, Journal of the Hydraulics Division, 95(1), 311–327.

      [2] Chen, C. L. (1983): Rainfall intensity-duration-frequency formulas, Journal of Hydraulic Engineering, 109(12), 1603–1621.

      [3] Chow, V. T., Maidment, D. R., Mays, L. W. (1998): Applied Hydrology, McGraw-Hill.

      [4] Hosking, J. R. M., and J. R. Wallis (1997): Regional Frequency Analysis, Cambridge Univ. Press, New York.

      [5] Koutsoyiannis, D., Kozonis, D., Manetas, A., 1998. “A mathematical framework for studying rainfall intensity–duration frequency relationships†J. Hydrol. 206, 118–135.

      [6] Maidment, D.R., (1993): Handbook of Hydrology, McGraw-Hill.

      [7] Nhat, L. M., Tachikawa, Y. and Takara, K. (2006a): Establishment of Intensity-Duration- Frequency curves for precipitation in the monsoon area of Vietnam, Annuals of Disas. Prev. Res. Inst., Kyoto Univ., No. 49B.

      [8] Nhat, L. M., Tachikawa, Y., Sayama, T., and Takara, K. (2006b): Generalized IDF for Precipitation in the Monsoon Areas, Proc. of the 7th Inter. Workshop on Precipitation in Urban Areas, St. Moritz, Switzerland, 180-184.

      [9] Hamzeh H. Ramadan, 2012 “Climate effects on the Litani basin watershed in Lebanonâ€.

      [10] Raghunah, H.M. 2006 Hydrologyâ€Principles, Analysis, Designâ€- 2nd Edition.

      [11] United States Agency for International Development (USAID), 2011 Litani River Basin Management Support Program.

      [12] U.C. Kothyari and R.J. Grade, “Rainfall intensity duration frequency formula for India,†Journal of Hydr. Engrg., ASCE, Vol. 118, No. 2, pp 323-336, 1992.

      [13] Ayman G. Awadallah, Mostafa Magdy, Ehab Helmy and Ehab Rashed, “Assessment of Rainfall Intensity Equations Enlisted in the Egyptian Code for Designing Potable Water and Sewage Networks,†Hindawi, Vol.2017.

      [14] Litani Water Authority,

  • Downloads

  • How to Cite

    Obeid, H., & El Kholy, M. (2021). Development of precipitation intensity-duration-frequency curves for litani river basin - Lebanon. International Journal of Engineering & Technology, 10(2), 190-198.