للمهندسين المدنيين (مدني+موارد مائية)

Date
Gumbel
Max.24 hr
rainfall at
Duhok
station
mm/day
جدول رقم )2(
تحليل بيانات االمطار بطريقة
(pi-px) (pi-px)2
Max.24 hr
rainfall at
Duhok from
max to min
mm/day
Rank
m
Tr=N+1/
m
Gamble
24/11/1992 70.40 8.2 67.1 150.00 1 19.0
11/05/1993 150.00 87.8 7707.1 120.90 2 9.5
01/04/1994 120.90 58.7 3444.5 71.60 3 6.3
12/03/1995 41.20 -21.0 441.4 70.40 4 4.8
27/12/1996 47.00 -15.2 231.3 67.40 5 3.8
09/12/1997 60.00 -2.2 4.9 65.00 6 3.2
28/03/1998 52.00 -10.2 104.2 64.00 7 2.7
14/12/1999 37.40 -24.8 615.5 60.00 8 2.4
03/01/2000 67.40 5.2 26.9 60.00 9 2.1
08/03/2001 37.30 -24.9 620.5 57.50 10 1.9
20/12/2002 60.00 -2.2 4.9 52.00 11 1.7
15/12/2003 41.00 -21.2 449.9 47.00 12 1.6
19/04/2004 65.00 2.8 7.8 41.20 13 1.5
23/01/2005 64.00 1.8 3.2 41.00 14 1.4
17/04/2006 71.60 9.4 88.2 38.50 15 1.3
05/01/2007 38.50 -23.7 562.2 38.50 16 1.2
29/11/2008 38.50 -23.7 562.2 37.40 17 1.1
19/12/2009 57.50 -4.7 22.2 37.30 18 1.1
Average 62.21 14964.0
Px: Average of the rainfall data
N: No. of data
Tr: Return period (Year)
Px: Average of the rainfall data = Σpi/N
N: No. of data
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