Perhitungan Curah Hujan
2
No . Tahu n CurahHujan ( Xi - Xa ) ( Xi - Xa )² Xi (mm) (mm) (mm) 1 2003 868.20 -493,2 243246,24 2 2004 1387.40 26 676 3 2005 1198.50 -162,9 26536,41 4 2006 1566.10 204,7 41902,09 5 2007 1098.30 -263,1 69221,61 6 2008 1405.10 43,7 1909,69 7 2009 1228.50 -132,9 17662,41 8 2010 1499.80 138,4 19154,56 9 2011 1681,0 319,6 102144,2 10 2012 1681,1 319,7 12208,09 n 10 ƩXi = 13614,0 Ʃ = 624661,26 Xa = ƩXi n = 13614,0 10 = 1361,4 mm/thn Xt = Xa + Yt− Yn Sn √ Ʃ ¿¿¿ = 1361,4 + 2,2502−0,4952 0,9456 √ 624661,26 10 −1 = 1850,357 mm/thn = 154,196 mm/bulan Keterangan : Xt = Curah hujan rata-rata Xa= Harga pengamatan rata-rata Lampiran P.2 Perhitungan Curah Hujan Rata-rata
Transcript of Perhitungan Curah Hujan
No. TahunCurahHujan ( Xi - Xa ) ( Xi - Xa )²
Xi (mm) (mm) (mm)
1 2003 868.20 -493,2 243246,24
2 2004 1387.40 26 676
3 2005 1198.50 -162,9 26536,41
4 2006 1566.10 204,7 41902,09
5 2007 1098.30 -263,1 69221,61
6 2008 1405.10 43,7 1909,69
7 2009 1228.50 -132,9 17662,41
8 2010 1499.80 138,4 19154,56
9 2011 1681,0 319,6 102144,2
10 2012 1681,1 319,7 12208,09
n 10 ƩXi = 13614,0 Ʃ = 624661,26
Xa = Ʃ Xi
n =
13614,010
= 1361,4 mm/thn
Xt = Xa + Yt−Yn
Sn√Ʃ ¿¿¿
= 1361,4 + 2,2502−0,49520,9456 √ 624661,26
10−1 = 1850,357
mm/thn
= 154,196 mm/bulanKeterangan :
Xt = Curah hujan rata-rata
Xa= Harga pengamatan rata-rata
Xi = Harga pengamatan tertentu
Yn= Reduced Mean
Yt= Reduced Variate
Sn = Reduced Standard Deviation
Lampiran P.2 Perhitungan Curah Hujan Rata-rata
