Development of envelope curve for Indus and Jhelum River basin in Pakistan and estimation of upper bound using envelope curve
Keywords:
Envelope curve; PMF; Gumbel method; Log Pearson Type- III; Two parameter gamma.Abstract
Envelope curves developed by plotting the largest flood peaks versus the catchment area can be used in estimating peak flood discharges. This study, therefore, provides a basic understanding of the relationship between the basin area and the peak flood. Envelope curve developed for Indus and Jhelum River basins is obtained by using the recent data as well, can be used for the estimation of peak flood discharge that has occurred in the specific region within these catchments and compared with the curve for Danube River basin. This work is also helpful for the improvement of flood frequency analysis at high return periods. Purpose of this work is deriving an upper bounds and to use them in the distribution function. By this approach, the estimation of discharge for higher return periods seems to provide more realistic discharge estimation for higher return periods.
References
Bayazit, M., Onoz, B., 2004. Envelope Curves for Maximum Floods in Turkey, 927-931.
Biondić, D., Barbalić, D., Petraš, J., 2007. Creager and Francou Rodier envelope curves for Extreme floods in the Danube River basin in Croatia. Pub Kick-Off meeting held in Brasilia, Proceedings, November, 2002, 221-227.
Castellarin, A., 2007. Probabilistic envelope curves for design flood estimation at ungauged sites. Water Resources Research, 43.
Guse, B., Thieken, A., Merz, B., 2007. Estimation of upper bounds using envelope curves. Disaster Reduction in Climate Change, 15, Karlsruhe University.
John, R., Crippen, B., 1982. Envelope Curves for Extreme Flood Events. Journal of the Hydraulics Division, 108, 1208-1212.
Matalas, C., Vogel, R., Castellarin, A., 2007. An assessment of exceedance probabilities of envelope curves.
