Document Type : Research Paper


1 Instructor, Department of Natural Resources, University of Jiroft

2 . Professor, Department of Natural Resources, University of Tehran

3 Assistant Professor, Department of Natural Resources, University of Tehran


Nowadays, designing hydraulic structures for flood damage mitigation has a significant importance in water engineering. One of the necessary parameters for the design of flood control measures is the probable maximum 24-hour precipitation in a 1000-year return period. This research was done using Jiroft Halilrud watershed data to evaluate Hershfild methods. Firstly, the maximum annual precipitation data series were used to do a frequency analysis using linear moments method to determine the maximum precipitation in 1000-year return period. Then this parameter was determined using the Hershfild method. The results showed a good agreement between the two methods according to correlation coefficient (0.87). The results of this research can be used for the monitoring system of the region



[1] Acreman, M. and Sinclair, C.D. (1986). Classification of drainage basins according to their physical characteristics: an application for flood frequency analysis in Scotland, Journal of Hydrology, 84, 365-380.

[2] Bates, B.C., Rahman, A., Mein, R.G. and Weinmann, P.E. (1998). Climatic and physical factors that influence the homogeneity of regional floods in southeastern Australia, Water Resources Research, 34, 3369-3381.

[3] Burn, D. (1990). Evaluation of regional flood frequency analysis with a region of influence approach, Water Resources Research, 26, 2257-2265.

[4] Chiang, S.M., Tsay, T.K. and Nix, S.J. (2002). Hydrologic regionalization of watersheds. I: Methodology development, Journal of Water Resources Planning and Management, 128, 3-11.

[5] Chow, V.T., Maidment, D.R. and Mays, L.W. (1998). Applied hydrology, McGraw-Hill, USA. 398.

[6] Corrigan, P., fen, D.D., Kluck, D.R. and Vogel, j.L. (1998). Probable maximum, precipitation-far, California, calculation procedure, Hydromoeteorological, Report No. 58, US. Pep. of commeVce Washington. D.s.

[7] Desa, M.N., Noriah, A. and Rakhecha, P.R. (2001). Probable maximum precipitation for 24 h duration over southwest Asian monsoon, Atmospheric research, 58, 41-54.

[8] Eng, K., Tasker, G.D. and Milly, P.C. (2005). An analysis of region-of-influence methods for flood regionalization in the Gulf-Atlantic rolling plains, Journal of the American Water Resources Association, 41, 135-143.

[9] Gahraman, B. (2007). The estimation of one day duration probable precipitation over Atrak watershed Iran, Iranian Journal of Science & Technology, Transaction B, Engineering, 32,175-179.

[10] Ghahreman, B., Davari, K. and Ansari, H. (2008). The estimated 24-hour PMP based on the frequency factor correction Hrshfyld, Iran Water Resources Management Conference, 23 and 25 October, Tabriz.

[11] Hosking, J.R.M. and Wallis, J.R. (1993). Some statistical useful in regional frequency analysis, Water Resources Research, 29, 271-281.

[12] Kjeldson, T.R., Smithers, J.C. and Schulze, R.E. (2002). Regional flood frequency analysis in the KwaZulu-Natal province, South Africa, using the index-flood method, Journal of Hydrology, 255, 194-211.

[13] Khalaji, M. and Sepaskhah, AS. (2002). Curves were plotted and compared PMP synoptic approach to Iran, Journal of Science and Technology of Agriculture and Natural Resources, 6(1), 11-1.

[14] Koutsoyannis, D. (1999). A probabilistic View of Hirschfield methods for estimating probable maximum precipitation, Water Resources Research, 35(4), 1313-1322.

[15] Ouarda, T., Girard, C., Cavadias, G.S. and Bobbie, B. (2001). Regional flood frequency estimation with canonical correlation analysis, Journal of Hydrology, 254, 157-173.

[16] Rao, A. Ramachandra and Khaled, H. Hammed (2000). Flood Frequency Analysis, CRC Press LLc, Boca Raton, FL.

[17] Rao, R. and Hammed, K.H. (1997). Regional frequency analysis of Wabash River flood data by L-moments, Journal of Hydrology Enginier, 2, 169-179.

[18] Rasthchi, J. (1992). Estimation of PMP in various ways: A Case Study Taleghan Basin, MS Thesis, Faculty of Agriculture, University Tehran.

[19] U.S. Army croos of Engineers (1965). Standard project flood determine, Civil Engineer bulletin No -52-8- Engineering manual Em 1110-2-1014.

[20] USBR (1973). Designs of small poems. us. dept. of the interior Washington, D.C.

[21] World metrological organization (1961). Estimate of maximum floods, WMO. tech note. no 98.

[22] Vogel, R.M. and Fennessey, N.M. (1993). L-moment diagram should replace product moment diagram, Water Resource. Res., 29, 1745-1752.

[23] Vogel, R.M. and McMahon, T.A. (1993). Floods-flow frequency model selection in Australia, Journal of Hydrology, 146, 421-449.