Preparation Depth - Area - Duration Curves for Kermanshah Povince
2004
Ahmadi, Mohammad | Beedle, Ramin | Hesadi, Homaun
Depth-Area-Duration curves were " provided for 3,6, ...and 24 hours ,and their relations were estimated for estern part of kermanshah province Qaraso,Gamasiab,Jamishan,kerend,and gavaroud watershed).There are adequate autographic and nonautographic. gauge in these regins.91.3 percent of the selected storm to analyse had 3 hours duration and 8.3 percent had less than 3 hours duration . Mass curve were prepared for nonautographic by using relation between rainfall gradient and altitude the isohyte maps were prepared for any duration and enclosed area were estimated by ILWIS software .Comulative area with mean of maximum depth of rainfall were analysed by spss .Then fit models were calculated and finally for any duration, one model was derived .Models conclution was shown as curves and tables . For example the model of 3,6,9...24 hours is:y = e Where: Y:area squre kilometer , and p is precipitation in milimeter, bo is constant of equation , bi is regrestion coefficient and e is neperien coefficient. Coefficient of equtions are as follow : bo bi Duration 13.45 -0.13 3 14.12 -0.13 6 12.51 -0.06 9 15.94 -0.14 12 14.59 -0.22 18 14.12 -0.13 24
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