Data Irigasi

Data Kelembaban Relatif (%)Stasiun Pengamatan Klimatologi Semarang

Elevasi : + 3m dpl

BulanJanuari Februari Maret April Mei Juni Juli Agustus September

Tahun

2001 83.00 81.00 83.00 82.00 71.00 75.00 71.00 72.00 68.002002 84.00 84.00 84.00 78.00 72.00 73.00 70.00 69.00 69.002003 82.00 82.00 82.00 76.00 75.00 74.00 69.00 68.00 67.002004 84.00 83.00 82.00 77.00 78.00 75.00 68.00 65.00 66.002005 84.00 81.00 79.00 76.00 77.00 78.00 67.00 64.00 68.002006 85.00 84.00 82.00 81.00 74.00 74.00 73.00 70.00 71.002007 83.00 87.00 84.00 82.00 75.00 72.00 69.00 67.00 66.002008 86.00 84.00 81.00 78.00 73.00 69.00 68.00 68.00 67.002009 84.00 85.00 83.00 80.00 75.00 73.00 70.00 69.00 68.00

2010 83.00 82.00 80.00 78.00 74.00 72.00 71.00 71.00 70.00Jumlah 838.00 833.00 820.00 788.00 744.00 735.00 696.00 683.00 680.00

83.80 83.30 82.00 78.80 74.40 73.50 69.60 68.30 68.00

Sumber : BMKG Balai Wilayah II Stasiun Meteorologi Semarang

Koordinat : 06o 59' LS dan 110o 23' BT

Rata2

Data Kelembaban Relatif (%)Stasiun Pengamatan Klimatologi Semarang

Elevasi : + 3m dpl

Oktober Nopember Desember

74.00 80.00 81.0072.00 76.00 77.0070.00 74.00 75.0071.00 73.00 78.0072.00 75.00 82.0073.00 76.00 78.0068.00 74.00 75.0070.00 77.00 81.0073.00 79.00 79.00

72.00 78.00 80.00715.00 762.00 786.00

71.50 76.20 78.60

Stasiun Pengamatan Klimatologi Semarang

Elevasi : + 3m dpl

BulanJanuari Februari Maret April Mei Juni Juli Agustus

Tahun

2001 27.30 26.50 27.40 27.30 27.97 28.00 27.16 27.402002 26.90 26.80 27.50 28.40 27.97 27.30 27.16 27.702003 26.70 26.90 26.90 28.30 27.97 27.60 27.16 27.502004 26.90 27.00 27.40 28.20 27.97 26.40 26.40 26.802005 27.10 27.30 27.40 27.40 28.10 27.40 27.50 27.502006 27.30 27.10 27.50 27.50 28.20 27.60 27.40 27.402007 27.20 26.90 26.80 27.50 27.80 27.50 27.20 27.402008 27.20 26.90 27.40 28.30 27.90 27.50 27.50 27.102009 27.30 26.80 27.00 27.70 28.30 27.60 27.50 27.50

2010 27.30 27.00 27.50 27.90 27.80 27.40 27.30 27.20Jumlah 271.20 269.20 272.80 278.50 279.98 274.30 272.28 273.50

27.12 26.92 27.28 27.85 28.00 27.43 27.23 27.35


Data Suhu Udara (oC)


Rata2

Stasiun Pengamatan Klimatologi Semarang

Elevasi : + 3m dpl

September Oktober Nopember Desember

27.70 28.40 27.80 27.4027.60 28.30 27.50 27.5027.80 28.60 27.60 27.6028.10 28.40 27.40 27.8027.40 28.50 27.50 28.2027.50 29.20 27.60 27.7027.80 28.40 28.10 27.6027.60 28.40 27.60 27.8027.40 28.60 27.70 27.70

27.70 28.40 27.70 27.90276.60 285.20 276.50 277.20

27.66 28.52 27.65 27.72

23' BT

Data Kecepatan Angin (km/jam)Stasiun Pengamatan Klimatologi Semarang

Elevasi : + 3m dpl


Tahun

2001 7.13 9.00 7.16 6.55 8.39 9.00 9.22 9.86 11.092002 10.44 9.14 7.06 7.06 9.04 8.89 8.89 8.86 9.722003 8.69 10.80 6.77 6.62 8.60 8.32 9.07 9.29 9.182004 7.31 7.74 7.74 6.30 8.42 8.28 9.00 8.42 8.422005 6.88 11.56 6.39 6.01 6.88 8.71 10.61 8.42 8.222006 9.00 7.99 5.54 5.58 9.14 9.29 8.86 9.50 9.142007 8.64 7.31 6.84 7.78 8.38 8.22 7.87 9.72 8.562008 8.86 10.04 6.73 6.84 8.75 7.13 9.05 10.01 9.322009 10.01 8.86 7.45 6.78 8.48 8.43 10.45 10.01 9.07

2010 9.65 8.34 7.16 6.52 8.13 8.21 9.12 9.43 9.32Jumlah 86.61 90.78 68.84 66.04 84.21 84.48 92.14 93.52 92.04

8.66 9.08 6.88 6.60 8.42 8.45 9.21 9.35 9.20



Rata2

Data Kecepatan Angin (km/jam)Stasiun Pengamatan Klimatologi Semarang

Elevasi : + 3m dpl


9.00 7.31 7.658.28 6.62 7.238.64 6.08 6.828.14 7.45 7.328.56 7.45 7.12

10.04 8.14 7.887.23 7.20 6.899.56 7.06 7.248.89 7.69 6.98

9.44 7.33 7.1187.78 72.33 72.24

8.78 7.23 7.22

Data Kecepatan Angin (m/detik)Stasiun Pengamatan Klimatologi Semarang

Elevasi : + 3m dpl


Tahun

2001 1.98 2.50 1.99 1.82 2.33 2.50 2.56 2.74 3.082002 2.90 2.54 1.96 1.96 2.51 2.47 2.47 2.46 2.702003 2.41 3.00 1.88 1.84 2.39 2.31 2.52 2.58 2.552004 2.03 2.15 2.15 1.75 2.34 2.30 2.50 2.34 2.342005 1.91 3.21 1.78 1.67 1.91 2.42 2.95 2.34 2.282006 2.50 2.22 1.54 1.55 2.54 2.58 2.46 2.64 2.542007 2.40 2.03 1.90 2.16 2.33 2.28 2.19 2.70 2.382008 2.46 2.79 1.87 1.90 2.43 1.98 2.51 2.78 2.592009 2.78 2.46 2.07 1.88 2.36 2.34 2.90 2.78 2.52

2010 2.68 2.32 1.99 1.81 2.26 2.28 2.53 2.62 2.59Jumlah 24.06 25.22 19.12 18.34 23.39 23.47 25.59 25.98 25.57

2.41 2.52 1.91 1.83 2.34 2.35 2.56 2.60 2.56



Rata2

Data Kecepatan Angin (m/detik)Stasiun Pengamatan Klimatologi Semarang

Elevasi : + 3m dpl


2.50 2.03 2.132.30 1.84 2.012.40 1.69 1.892.26 2.07 2.032.38 2.07 1.982.79 2.26 2.192.01 2.00 1.912.66 1.96 2.012.47 2.14 1.94

2.62 2.04 1.9824.38 20.09 20.07

2.44 2.01 2.01

Data Penyinaran Matahari (%)Stasiun Pengamatan Klimatologi Semarang

Elevasi : + 3m dpl


Tahun

2001 45.00 55.00 64.00 70.00 72.00 65.00 68.00 63.00 69.002002 72.00 62.00 58.00 56.00 67.00 69.00 66.00 68.00 68.002003 46.00 48.00 66.00 68.00 70.00 73.00 72.00 74.00 72.002004 42.00 41.00 51.00 58.00 65.00 67.00 74.00 69.00 74.002005 37.00 52.00 62.00 63.00 63.00 75.00 75.00 73.00 78.002006 41.00 44.00 59.00 57.00 72.00 67.00 78.00 81.00 69.002007 43.00 35.00 60.00 65.00 69.00 71.00 72.00 74.00 79.002008 35.00 40.00 68.00 70.00 73.00 63.00 74.00 91.00 58.002009 40.00 59.00 54.00 56.00 78.00 68.00 70.00 81.00 70.00

2010 42.00 45.00 61.00 57.00 65.00 62.00 77.00 85.00 67.00Jumlah 443.00 481.00 603.00 620.00 694.00 680.00 726.00 759.00 704.00

44.30 48.10 60.30 62.00 69.40 68.00 72.60 75.90 70.40



Rata2

Data Penyinaran Matahari (%)Stasiun Pengamatan Klimatologi Semarang

Elevasi : + 3m dpl


72.00 58.00 60.0066.00 61.00 62.0069.00 63.00 64.0076.00 70.00 71.0077.00 51.00 54.0047.00 42.00 50.0076.00 53.00 48.0078.00 65.00 57.0064.00 62.00 60.00

55.00 53.00 56.00680.00 578.00 582.00

68.00 57.80 58.20

Data Curah Hujan (mm)Kabupaten : Semarang

Kecamatan : Mijen

BulanJanuari Februari Maret April Mei Juni Juli Agustus

Tahun

2001 465.00 329.00 791.00 750.00 40.00 142.00 0.00 0.002002 437.00 489.00 190.00 186.00 41.00 11.00 24.00 0.002003 322.00 500.00 294.00 256.00 93.00 8.00 0.00 0.002004 267.00 318.00 422.00 47.00 56.00 10.00 10.00 7.002005 165.00 179.00 219.00 229.00 13.00 187.00 103.00 104.002006 0.00 0.00 0.00 237.00 160.00 13.00 0.00 0.002007 80.00 168.00 292.00 124.00 57.00 70.00 0.00 39.002008 545.00 442.00 397.00 209.00 76.00 31.00 1.00 72.002009 816.00 479.00 177.00 189.00 316.00 189.00 17.00 0.00

2010 356.00 142.00 323.00 267.00 496.00 107.00 34.00 92.00

Jumlah 3453.00 3046.00 3105.00 2494.00 1348.00 768.00 189.00 314.00

345.30 304.60 310.50 249.40 134.80 76.80 18.90 31.40

Std. Deviasi (Sx) 238.77 175.09 207.82 187.83 154.21 74.26 31.90 42.39

k 1.85 1.85 1.85 1.85 1.85 1.85 1.85 1.85Xt 786.58 628.19 694.58 596.53 419.80 214.05 77.86 109.75

mm/hari 25.37 22.44 22.41 19.88 13.54 7.13 2.51 3.54

Curah Hujan Rencana :Xt = Xr + (K x Sx)

(Metode Gumbel)

Xt = Hujan dalam periode ulang tahunXr = Harga rata - rataK = Faktor frekuensi

Menghitung Nilai K :

Yt = Reduce Variate (Tabel terlampir)Yn = Harga Rata - rata reduce variate (Tabel terlampir)Sn = Reduce Standar Deviasi (Tabel terlampir)n = Jumlah data

Rata2 (Xr)

Data Curah Hujan (mm)Kabupaten : Semarang

Kecamatan : Mijen

September Oktober Nopember Desember

55.00 283.00 242.00 397.000.00 29.00 282.00 766.00

62.00 61.00 98.00 284.007.00 8.00 32.00 116.00

50.00 243.00 177.00 452.000.00 22.00 134.00 330.000.00 123.00 209.00 379.00

43.00 314.00 375.00 434.0091.00 70.00 215.00 311.00

267.00 237.00 228.00 396.00

575.00 1390.00 1992.00 3865.00

57.50 139.00 199.20 386.50

80.12 118.24 96.44 164.451.85 1.85 1.85 1.85

205.58 357.53 377.44 690.43

6.85 11.53 12.58 22.27

Tabel 2 Suhu(20 - 30 derajat Celcius)

Suhu 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.88.37 8.38 8.40 8.41 8.42 8.43 8.44 8.46 8.47

20 1.84 1.86 1.87 1.88 1.89 1.90 1.91 1.92 1.9317.53 17.64 17.75 17.86 17.97 18.08 18.31 18.20 18.43

1.58 1.58 1.59 1.60 1.60 1.61 1.62 1.61 1.628.49 8.50 8.51 8.52 8.53 8.54 8.56 8.57 8.58

21 1.96 1.97 1.98 1.99 2.00 2.01 2.02 2.04 2.0518.65 18.77 18.88 19.00 19.11 19.23 19.35 19.45 19.58

1.64 1.65 1.66 1.66 1.66 1.67 1.67 1.68 1.688.60 8.61 8.62 8.63 8.64 8.65 8.67 8.68 8.69

22 2.07 2.08 2.09 2.10 2.11 2.12 2.14 2.15 2.1619.82 19.94 20.06 20.19 20.31 20.43 20.54 20.69 20.80

1.70 1.71 1.72 1.72 1.73 1.74 1.74 1.75 1.758.72 8.73 8.74 8.76 8.77 8.78 8.79 8.81 8.82

23 2.18 2.19 2.21 2.22 2.23 2.24 2.26 2.27 2.2821.05 21.19 21.32 21.45 21.58 21.71 21.84 21.97 22.10

1.77 1.78 1.78 1.79 1.80 1.80 1.81 1.82 1.828.84 8.85 8.86 8.88 8.89 8.90 8.90 8.93 8.94

24 2.30 2.32 2.33 2.34 2.36 2.37 2.38 2.40 2.4122.37 22.50 22.63 22.76 22.91 23.05 23.15 23.31 23.45

1.83 1.84 1.85 1.86 1.87 1.87 1.88 1.89 1.898.96 8.97 8.98 9.00 9.01 9.02 9.03 9.05 9.06

25 2.43 2.45 2.46 2.47 2.49 2.50 2.51 2.52 2.5423.75 23.90 24.03 24.20 24.35 24.49 24.64 24.79 24.94

1.91 1.92 1.92 1.93 1.94 1.95 1.95 1.96 1.979.08 9.09 9.10 9.12 9.13 9.14 9.15 9.17 9.18

26 2.56 2.57 2.59 2.60 2.62 2.63 2.64 2.66 2.6725.31 25.45 25.60 25.74 25.89 26.03 26.11 26.32 26.46

1.98 1.99 2.00 2.01 2.01 2.02 2.03 2.04 2.049.20 9.21 9.22 9.24 9.25 9.26 9.27 9.29 9.30

27 2.70 2.71 2.73 2.74 2.76 2.78 2.79 2.80 2.8226.74 26.90 27.05 27.21 27.37 27.53 27.69 27.85 28.10

2.06 2.07 2.08 2.08 2.09 2.09 2.10 2.11 2.129.32 9.33 9.35 9.36 9.37 9.39 9.40 9.41 9.43

28 2.86 2.87 2.88 2.89 2.90 2.91 2.92 2.94 2.9628.32 28.49 28.66 28.83 29.00 29.17 29.34 29.51 29.68

210)( xTf ai

21 10xL

SaP Waz }

2.14 2.15 2.16 2.17 2.18 2.18 2.19 2.20 2.219.45 9.46 9.47 9.49 9.50 9.51 9.52 9.54 9.55

29 2.99 3.01 3.02 3.04 3.05 3.07 3.08 3.10 3.1130.03 30.20 30.38 30.56 30.74 30.92 31.10 31.28 31.46

2.23 2.24 2.25 2.25 2.26 2.27 2.28 2.29 2.309.57 9.58 9.60 9.61 9.62 9.64 9.65 9.66 9.68

30 3.14 3.16 3.18 3.19 3.21 3.23 3.24 3.26 3.2831.82 32.00 32.19 32.38 32.57 32.76 32.95 33.14 33.33

2.32 2.33 2.34 2.35 2.36 2.37 2.38 2.38 2.39Sumber : Pedoman perhitungan kebutuhan air PIJT

Tabel 3 Tdp

Tdp 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.815 0.195 0.194 0.194 0.193 0.192 0.191 0.190 0.189 0.188

12.780 12.860 12.950 13.030 13.110 13.200 13.280 13.370 13.45016 0.186 0.185 0.184 0.183 0.182 0.181 0.180 0.179 0.178

13.630 13.710 13.800 13.900 13.990 14.080 14.170 14.260 14.35017 0.176 0.175 0.175 0.174 0.173 0.172 0.171 0.170 0.169

14.530 14.620 14.710 14.800 14.900 14.990 15.090 15.170 15.37018 0.167 0.166 0.165 0.164 0.163 0.162 0.161 0.160 0.159

15.460 15.560 15.660 15.760 15.860 15.960 16.060 16.160 16.26019 0.157 0.156 0.156 0.155 0.154 0.153 0.152 0.151 0.150

16.460 16.570 16.680 16.790 16.900 17.000 17.100 17.100 17.32020 0.148 0.147 0.146 0.145 0.144 0.143 0.142 0.141 0.140

17.530 17.640 17.750 17.860 17.970 18.090 18.200 18.310 18.43021 0.137 0.136 0.135 0.134 0.133 0.132 0.131 0.130 0.129

18.650 18.770 18.880 19.000 19.110 19.230 19.350 19.460 19.58022 0.127 0.126 0.125 0.124 0.123 0.122 0.121 0.120 0.119

19.820 19.940 20.060 20.190 20.310 20.430 20.580 20.650 20.80023 0.116 0.115 0.114 0.113 0.112 0.111 0.110 0.109 0.108

21.050 21.190 21.320 21.450 21.580 21.710 21.840 21.970 22.10024 0.106 0.105 0.104 0.103 0.102 0.101 0.100 0.099 0.097

22.370 22.500 22.600 22.760 22.910 23.050 23.190 23.330 23.45025 0.095 0.094 0.093 0.092 0.091 0.090 0.089 0.088 0.087

23.750 23.900 24.030 24.200 24.330 24.490 24.640 24.790 24.940Sumber : Pedoman perhitungan kebutuhan air PIJT

Tabel 4 x F(U2)= 0,49 x 0,35 (0,5 + 0,54 U2)

U2 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80 0.086 0.095 0.104 0.123 0.132 0.142 0.151 0.161 0.1631 0.178 0.187 0.197 0.206 0.215 0.225 0.234 0.244 0.2592 0.271 0.280 0.290 0.299 0.308 0.318 0.327 0.337 0.3463 0.364 0.373 0.382 0.392 0.401 0.410 0.420 0.429 0.4384 0.456 0.465 0.475 0.484 0.493 0.503 0.512 0.522 0.531

5 0.549 0.558 0.568 0.577 0.586 0.596 0.605 0.614 0.6246 0.642 0.651 0.660 0.670 0.679 0.688 0.698 0.707 0.7167 0.734 0.743 0.752 0.762 0.771 0.790 0.799 0.808 0.9018 0.826 0.835 0.845 0.854 0.863 0.873 0.882 0.891 0.9019 0.919 0.928 0.938 0.947 0.956 0.966 0.975 0.984 0.994

10 1.012 1.021 1.031 1.040 1.049 1.059 1.068 1.077 1.087

Jika Elevasi pencatat / alat elevasi bukan pada + 2 m, maka data yang tercata harus dikonversi

z = elevasi pencatat dalam m

z 0.50 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 f(z) 1.220 1.105 1.000 0.954 0.906 0.877 0.854 0.836 0.820

Sumber : Pedoman perhitungan kebutuhan air PIJT

Tabel 5 Letak lintang

Latitude Jan Feb Mar April Mei Juni Juli Agustus Septeb0 8.590 8.870 8.930 8.670 8.230 7.950 8.030 8.410 8.7701 8.660 8.920 8.930 8.620 8.150 7.850 7.940 8.340 8.7402 8.740 8.960 8.920 8.570 8.060 7.750 7.850 8.270 8.7103 8.820 9.000 8.920 8.520 7.980 7.650 7.750 8.210 8.6904 8.890 9.040 7.910 8.470 7.890 7.550 7.660 8.140 8.6705 8.970 9.080 8.910 8.420 7.810 7.450 7.560 8.080 8.6406 9.040 9.120 8.900 8.370 7.720 7.350 7.470 8.010 8.620

6.59 9.087 9.144 8.900 8.341 7.673 7.291 7.411 7.975 8.6027 9.120 9.160 8.900 8.320 7.640 7.250 7.370 7.950 8.5908 9.190 9.200 8.900 8.270 7.550 7.150 7.280 7.880 8.5709 9.270 9.240 8.900 8.220 7.470 7.050 7.180 7.810 8.540

10 9.350 9.280 8.890 8.170 7.380 6.950 7.090 7.740 8.510Sumber : Pedoman perhitungan kebutuhan air PIJT

Tabel 6

r0 10 20 30 40 50 60 70 80

90 0.000 0.039 0.078 0.117 0.156 0.195 0.234 0.273 0.31280 0.019 0.058 0.097 0.136 0.175 0.214 0.253 0.292 0.33170 0.074 0.113 0.152 0.191 0.230 0.269 0.308 0.347 0.38660 0.120 0.159 0.198 0.237 0.276 0.315 0.354 0.393 0.43250 0.140 0.179 0.218 0.257 0.296 0.335 0.374 0.413 0.45240 0.167 0.206 0.245 0.284 0.323 0.362 0.401 0.440 0.47930 0.188 0.227 0.266 0.305 0.344 0.383 0.422 0.461 0.50020 0.204 0.243 0.282 0.321 0.360 0.399 0.438 0.477 0.516

Degrees N or S

zz xUzfxUz

U )(2 7

1

2

10 0.214 0.253 0.292 0.331 0.370 0.409 0.449 0.487 0.5266.59 0.216 0.255 0.294 0.333 0.372 0.411 0.450 0.489 0.528

6 0.216 0.255 0.294 0.333 0.372 0.411 0.450 0.489 0.5280 0.218 0.257 0.296 0.335 0.374 0.413 0.452 0.491 0.530


Tabel 6'Besaran m Besaran m

Octan f(m) tenth f(m)0 1 0 11 0.9 1 0.922 0.8 2 0.843 0.7 3 0.764 0.6 4 0.685 0.5 5 0.66 0.4 6 0.527 0.3 7 0.448 0.2 8 0.36

9 0.2910 0.2


PERHITUNGAN ANGKA EVAPORASI

Dasar Unit Jan Feb1 Suhu Udara C 27.12 26.92

2 Kelembaban Relatif % 83.80 83.30

3 Kecepatan Angin U2 m/dt 2.41 2.52

4 Penyinaran Matahari (12jam); Q1 % 44.30 48.10

5 Lintang 6.59 6.59

6 Albedo7 Transfer ke 8 jam 0,786 Q1+3,46 % 38.28 41.27

Perhitungan (prosida/Penman)

0.98.48 8 Tabel 2 dan (1) 9.21 9.19

1.94 9 Tabel 2 dan (1) 2.71 2.69

18.54 10 Tabel 2 dan (1) mmHg 26.90 26.60

1.63 11 Tabel 2 dan (1) 2.07 2.05

8.59 12 = (2) x (10) mmHg 22.54 22.16 2.06 13 Tabel 3 dan (12) 0.122 0.125

19.70 14 = (10) - (12) mmHg 4.36 4.44 1.70 15 Tabel 4 dan (3) 0.308 0.318

8.71 16 = (14) x (15) 1.342 1.4132.17 17 Tabel 5 dan (5) 9.087 9.144

20.93 18 Tabel 6 dan (7) dan (5) 0.365 0.377

1.76 19 = (17) x (18) mm/hari 3.32 3.44 8.83 20 = (8) x {1.00 - (7)} 5.68 5.40 2.29 21 =1.00-{(20)/10} 0.43 0.46

22.23 22 = (8) x (13) x (21) mm/hari 0.48 0.53 1.83 23 = (19) - (22) mm/hari 2.83 2.92 8.95 24 = (9) x (23) mm/hari 7.67 7.84 2.42 25 = (16) x (24) mm/hari 10.30 11.08

23.60 26 Eo= (25 )/ (11) mm/hari 4.976 5.4041.909.072.55

25.081.989.192.69

26.602.059.312.83

28.162.139.442.93

29.85

2.229.563.13

31.612.319.693.29

33.522.40

0.90.187

13.5400.177

14.4600.168

15.3800.158

16.3600.149

17.4300.139

18.5400.128

19.7000.117

20.9300.107

22.2300.096

23.6000.860

25.090

0.90.1690.2620.3550.4470.540

0.6320.7250.9100.9101.0031.096

9.00 10.00 0.807 0.795

Oktober Nopemb Des8.830 8.620 8.4608.850 8.680 8.5508.880 8.750 8.6308.910 8.810 8.7208.930 8.880 8.8008.950 8.940 8.8908.970 9.010 8.9708.982 9.051 9.0238.990 9.080 9.0609.010 9.140 9.1409.030 9.210 9.2309.060 9.270 9.320

r 38.28 41.27 50.86 52.1990 100 0.365 0.377 0.414 0.4190.351 0.3900.370 0.4090.425 0.4640.471 0.5100.491 0.5300.518 0.5570.539 0.5780.555 0.594

0.565 0.6040.567 0.6060.567 0.6060.569 0.608

PERHITUNGAN ANGKA EVAPORASI

Mar Apr Mei Jun Jul Agt Sep Okt Nov Des27.28 27.85 28.00 27.43 27.23 27.35 27.66 28.52 27.65 27.72

82.00 78.80 74.40 73.50 69.60 68.30 68.00 71.50 76.20 78.60

1.91 1.83 2.34 2.35 2.56 2.60 2.56 2.44 2.01 2.01

60.30 62.00 69.40 68.00 72.60 75.90 70.40 68.00 57.80 58.20

6.59 6.59 6.59 6.59 6.59 6.59 6.59 6.59 6.59 6.59

50.86 52.19 58.01 56.91 60.52 63.12 58.79 56.91 48.89 49.21

9.24 9.30 9.32 9.25 9.22 9.24 9.29 9.39 9.27 9.29

2.74 2.82 2.86 2.76 2.73 2.74 2.80 2.91 2.79 2.80

27.21 28.10 28.32 27.37 27.05 27.21 27.85 29.17 27.69 27.85

2.08 2.12 2.14 2.09 2.08 2.08 2.11 2.18 2.10 2.11

22.31 22.14 21.07 20.12 18.83 18.58 18.94 20.86 21.10 21.89 0.124 0.126 0.136 0.147 0.159 0.161 0.158 0.139 0.136 0.128

4.90 5.96 7.25 7.25 8.22 8.63 8.91 8.31 6.59 5.96 0.262 0.259 0.299 0.299 0.327 0.327 0.327 0.308 0.271 0.271

1.283 1.543 2.168 2.169 2.689 2.821 2.914 2.561 1.786 1.6158.900 8.341 7.673 7.291 7.411 7.975 8.602 8.982 9.051 9.023

0.414 0.419 0.442 0.438 0.452 0.462 0.445 0.438 0.406 0.408

3.69 3.50 3.39 3.19 3.35 3.68 3.83 3.93 3.68 3.68 4.54 4.45 3.91 3.99 3.64 3.41 3.83 4.05 4.74 4.72 0.55 0.56 0.61 0.60 0.64 0.66 0.62 0.60 0.53 0.53 0.63 0.65 0.77 0.82 0.93 0.98 0.91 0.78 0.66 0.63 3.06 2.85 2.62 2.37 2.42 2.70 2.92 3.15 3.01 3.05 8.38 8.03 7.49 6.55 6.60 7.41 8.18 9.18 8.41 8.54 10.76 12.38 16.25 14.21 17.74 20.89 23.85 23.51 15.02 13.79 5.172 5.841 7.591 6.799 8.528 10.045 11.304 10.783 7.153 6.537

58.01 56.91 60.52 63.12 58.79 56.91 48.89 49.210.442 0.438 0.452 0.462 0.445 0.438 0.406 0.408

PERHITUNGAN KEBUTUHAN AIR TANAMAN PADI

BULAN MAR APR MEI JUN JUL AGT SEP OKTEVAPORASI (Eo) 5.172 5.841 7.591 6.799 8.528 10.045 11.304 10.783

PERKOLASI (P) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00

Eo+P 6.172 6.841 8.591 7.799 9.528 11.045 12.304 11.783

Rh=HUJAN(1 IN 5 DRY)=XT/JML HARI 22.406 19.884 13.542 7.135 2.512 3.540 6.853 11.533

1 0.12 2.689 2.386 1.625 0.856 0.301 0.425 0.822 1.384

2 0.35 7.842 6.960 4.740 2.497 0.879 1.239 2.398 4.037

3 0.48 10.755 9.545 6.500 3.425 1.206 1.699 3.289 5.536

4 0.50 11.203 9.942 6.771 3.567 1.256 1.770 3.426 5.767

5 0.40 8.962 7.954 5.417 2.854 1.005 1.416 2.741 4.613

6 0.40 8.962 7.954 5.417 2.854 1.005 1.416 2.741 4.613

7 0.40 8.962 7.954 5.417 2.854 1.005 1.416 2.741 4.613

8 0.27 6.050 5.369 3.656 1.926 0.678 0.956 1.850 3.114

9 0.13 2.913 2.585 1.760 0.928 0.326 0.460 0.891 1.499

1 1.20 6.207 7.010 9.110 8.158 10.234 12.054 13.565 12.939

2 1.27 6.569 7.419 9.641 8.634 10.831 12.757 14.356 13.694

3 1.33 6.879 7.769 10.097 9.042 11.343 13.359 15.035 14.341

4 1.30 6.724 7.594 9.869 8.838 11.087 13.058 14.695 14.018

5 1.15 5.948 6.718 8.730 7.818 9.808 11.551 13.000 12.400

6 0.00 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000TANAMAN PADI MAR APR MEI JUN JUL AGT SEP OKT

GOLONGAN 1

LP 11.00 11.00 10.70 11.20 12.53 10.70 11.00 11.80

LP-RE1 =A=Ir 8.31 8.61 9.07 10.34 12.23 10.28 10.18 10.42

A*0.116 =B 0.96 1.00 1.05 1.20 1.42 1.19 1.18 1.21

B*1.25 =C 1.21 1.25 1.32 1.50 1.77 1.49 1.48 1.51C*1.15 =D 1.39 1.44 1.51 1.72 2.04 1.71 1.70 1.74D*1.1 =E 1.52 1.58 1.66 1.90 2.24 1.88 1.87 1.91LP 11.00 11.00 10.70 11.20 7.18 10.70 11.00 11.80LP-RE2 =A=Ir 3.16 4.04 5.96 8.70 6.30 9.46 8.60 7.76

A*0.116 =B 0.37 0.47 0.69 1.01 0.73 1.10 1.00 0.90

B*1.25 =C 0.46 0.59 0.86 1.26 0.91 1.37 1.25 1.13C*1.15 =D 0.53 0.67 0.99 1.45 1.05 1.58 1.43 1.29

D*1.1 =E 0.58 0.74 1.09 1.60 1.16 1.74 1.58 1.42

Et1+P+W-RE3 =A=Ir -0.22 1.80 6.94 9.07 13.36 14.69 14.61 11.74

A*0.116 =B -0.02 0.21 0.81 1.05 1.55 1.70 1.69 1.36

B*1.25 =C -0.03 0.26 1.01 1.31 1.94 2.13 2.12 1.70C*1.15 =D -0.04 0.30 1.16 1.51 2.23 2.45 2.44 1.96

D*1.1 =E -0.04 0.33 1.27 1.66 2.45 2.69 2.68 2.15

Et2+P+W-RE4 =A=Ir -0.30 1.81 7.20 9.40 13.91 15.32 15.26 12.26

A*0.116 =B -0.04 0.21 0.84 1.09 1.61 1.78 1.77 1.42

B*1.25 =C -0.04 0.26 1.04 1.36 2.02 2.22 2.21 1.78C*1.15 =D -0.05 0.30 1.20 1.57 2.32 2.55 2.54 2.04D*1.1 =E -0.06 0.33 1.32 1.72 2.55 2.81 2.80 2.25

Et3+P+W-RE5 =A=Ir 2.25 4.15 9.01 10.52 14.67 16.27 16.62 14.06

A*0.116 =B 0.26 0.48 1.05 1.22 1.70 1.89 1.93 1.63

Faktor Hujan

dengan 3 gol (FH) tiap 2 mingguan

HUJAN EFEKTIF Re= hujan * FH

KOEFISIEN TANAMAN

HYV Prosida (Kc)

Evapotranspirasi ET = Eo * Kc

Re ke1 Pengolahan tanah untuk

tanaman Padi kejenuhan 200 mm 2 minggu I


tanaman Padi kejenuhan 200 mm 2 minggu II

Pertumbuhan 2 minggu I Re ke3

ET ke 1 w=3,3333

Pertumbuhan 2 minggu II Re ke4 ET ke 2 w=3,3333

Pertumbuhan 2 minggu III Re

ke5 ET ke 3 w=3,3333

B*1.25 =C 0.33 0.60 1.31 1.53 2.13 2.36 2.41 2.04

C*1.15 =D 0.37 0.69 1.50 1.75 2.45 2.71 2.77 2.34

D*1.1 =E 0.41 0.76 1.65 1.93 2.69 2.98 3.05 2.58

Et4+P+W-RE6 =A=Ir 2.09 3.97 8.78 10.31 14.41 15.97 16.28 13.73

A*0.116 =B 0.24 0.46 1.02 1.20 1.67 1.85 1.89 1.59

B*1.25 =C 0.30 0.58 1.27 1.50 2.09 2.32 2.36 1.99

C*1.15 =D 0.35 0.66 1.46 1.72 2.40 2.66 2.72 2.29

D*1.1 =E 0.38 0.73 1.61 1.89 2.64 2.93 2.99 2.52

Et5+P-RE7 =A=Ir -2.01 -0.24 4.31 5.96 9.80 11.14 11.26 8.79

A*0.116 =B -0.23 -0.03 0.50 0.69 1.14 1.29 1.31 1.02

B*1.25 =C -0.29 -0.03 0.63 0.86 1.42 1.61 1.63 1.27

C*1.15 =D -0.34 -0.04 0.72 0.99 1.63 1.86 1.88 1.47

D*1.1 =E -0.37 -0.04 0.79 1.09 1.80 2.04 2.07 1.61

Et6+P-RE8 =A=Ir -5.05 -4.37 -2.66 -0.93 0.32 0.04 -0.85 -2.11

A*0.116 =B -0.59 -0.51 -0.31 -0.11 0.04 0.01 -0.10 -0.25

B*1.25 =C -0.73 -0.63 -0.39 -0.13 0.05 0.01 -0.12 -0.31

C*1.15 =D -0.84 -0.73 -0.44 -0.15 0.05 0.01 -0.14 -0.35

D*1.1 =E -0.93 -0.80 -0.49 -0.17 0.06 0.01 -0.16 -0.39GOLONGAN 2

LP 11.00 11.00 10.70 11.20 7.79 10.70 11.00 11.80

LP-RE2 =A=Ir 3.16 4.04 5.96 8.70 6.91 9.46 8.60 7.76

A*0.116 =B 0.37 0.47 0.69 1.01 0.80 1.10 1.00 0.90

B*1.25 =C 0.46 0.59 0.86 1.26 1.00 1.37 1.25 1.13C*1.15 =D 0.53 0.67 0.99 1.45 1.15 1.58 1.43 1.29D*1.1 =E 0.58 0.74 1.09 1.60 1.27 1.74 1.58 1.42LP 11.00 11.00 10.70 11.20 7.94 10.70 11.00 11.80LP-RE3 =A=Ir 0.25 1.46 4.20 7.78 6.73 9.00 7.71 6.26

A*0.116 =B 0.03 0.17 0.49 0.90 0.78 1.04 0.89 0.73

B*1.25 =C 0.04 0.21 0.61 1.13 0.98 1.31 1.12 0.91C*1.15 =D 0.04 0.24 0.70 1.30 1.12 1.50 1.29 1.04

D*1.1 =E 0.04 0.27 0.77 1.43 1.24 1.65 1.41 1.15

Et1+P+W-RE4 =A=Ir 5.18 8.99 13.47 17.45 23.36 25.92 25.25 18.66

A*0.116 =B 0.60 1.04 1.56 2.02 2.71 3.01 2.93 2.16

B*1.25 =C 0.75 1.30 1.95 2.53 3.39 3.76 3.66 2.71C*1.15 =D 0.86 1.50 2.25 2.91 3.89 4.32 4.21 3.11

D*1.1 =E 0.95 1.65 2.47 3.20 4.28 4.75 4.63 3.42

Et2+P+W-RE5 =A=Ir 7.11 9.64 16.15 16.91 22.69 25.72 27.25 24.20

A*0.116 =B 0.82 1.12 1.87 1.96 2.63 2.98 3.16 2.81

B*1.25 =C 1.03 1.40 2.34 2.45 3.29 3.73 3.95 3.51C*1.15 =D 1.19 1.61 2.69 2.82 3.78 4.29 4.54 4.03D*1.1 =E 1.30 1.77 2.96 3.10 4.16 4.72 5.00 4.44

Et3+P+W-RE6 =A=Ir 7.42 9.99 16.60 17.32 23.20 26.32 27.93 24.84

A*0.116 =B 0.86 1.16 1.93 2.01 2.69 3.05 3.24 2.88

B*1.25 =C 1.08 1.45 2.41 2.51 3.36 3.82 4.05 3.60

C*1.15 =D 1.24 1.67 2.77 2.89 3.87 4.39 4.66 4.14

D*1.1 =E 1.36 1.83 3.05 3.18 4.26 4.83 5.12 4.56

Et4+P+W-RE7 =A=Ir 7.27 9.81 16.38 17.12 22.94 26.02 27.59 24.52

A*0.116 =B 0.84 1.14 1.90 1.99 2.66 3.02 3.20 2.84


ke5 ET ke 3 w=3,3333

Pertumbuhan 2 minggu IV Re

ke6 ET ke 4 w=3,3333

Pertumbuhan 2 minggu V Re ke7

ET ke 5

Pertumbuhan 2 minggu VI Re ke8

ET ke 6






ET ke 1 w=3,3333



ke6 ET ke 3 w=3,3333


ke7 ET ke 4 w=3,3333

B*1.25 =C 1.05 1.42 2.37 2.48 3.33 3.77 4.00 3.56

C*1.15 =D 1.21 1.64 2.73 2.85 3.83 4.34 4.60 4.09

D*1.1 =E 1.33 1.80 3.00 3.14 4.21 4.77 5.06 4.50

Et5+P-RE8 =A=Ir 6.07 8.19 13.67 13.69 18.66 21.64 23.45 21.07

A*0.116 =B 0.70 0.95 1.59 1.59 2.16 2.51 2.72 2.44

B*1.25 =C 0.88 1.19 1.98 1.99 2.71 3.14 3.40 3.06

C*1.15 =D 1.01 1.37 2.28 2.28 3.11 3.61 3.91 3.51

D*1.1 =E 1.11 1.50 2.51 2.51 3.42 3.97 4.30 3.86

Et6+P-RE9 =A=Ir 3.26 4.26 6.83 6.87 9.20 10.58 11.41 10.28

A*0.116 =B 0.38 0.49 0.79 0.80 1.07 1.23 1.32 1.19

B*1.25 =C 0.47 0.62 0.99 1.00 1.33 1.53 1.65 1.49

C*1.15 =D 0.54 0.71 1.14 1.15 1.53 1.76 1.90 1.71

D*1.1 =E 0.60 0.78 1.25 1.26 1.69 1.94 2.09 1.89GOLONGAN 3

LP 11.00 11.00 10.70 11.20 8.49 10.70 11.00 11.80

LP-RE3 =A=Ir 0.25 1.46 4.20 7.78 7.28 9.00 7.71 6.26

A*0.116 =B 0.03 0.17 0.49 0.90 0.84 1.04 0.89 0.73

B*1.25 =C 0.04 0.21 0.61 1.13 1.06 1.31 1.12 0.91C*1.15 =D 0.04 0.24 0.70 1.30 1.21 1.50 1.29 1.04D*1.1 =E 0.04 0.27 0.77 1.43 1.34 1.65 1.41 1.15LP 11.00 11.00 10.70 11.20 8.76 10.70 11.00 11.80LP-RE4 =A=Ir -0.20 1.06 3.93 7.63 7.51 8.93 7.57 6.03

A*0.116 =B -0.02 0.12 0.46 0.89 0.87 1.04 0.88 0.70

B*1.25 =C -0.03 0.15 0.57 1.11 1.09 1.29 1.10 0.87C*1.15 =D -0.03 0.18 0.66 1.27 1.25 1.49 1.26 1.01

D*1.1 =E -0.04 0.19 0.72 1.40 1.38 1.64 1.39 1.11

Et1+P+W-RE5 =A=Ir 6.75 9.23 15.62 16.44 22.09 25.02 26.46 23.44

A*0.116 =B 0.78 1.07 1.81 1.91 2.56 2.90 3.07 2.72

B*1.25 =C 0.98 1.34 2.26 2.38 3.20 3.63 3.84 3.40C*1.15 =D 1.13 1.54 2.60 2.74 3.68 4.17 4.41 3.91

D*1.1 =E 1.24 1.69 2.86 3.01 4.05 4.59 4.85 4.30

Et2+P+W-RE6 =A=Ir 7.11 9.64 16.15 16.91 22.69 25.72 27.25 24.20

A*0.116 =B 0.82 1.12 1.87 1.96 2.63 2.98 3.16 2.81

B*1.25 =C 1.03 1.40 2.34 2.45 3.29 3.73 3.95 3.51C*1.15 =D 1.19 1.61 2.69 2.82 3.78 4.29 4.54 4.03D*1.1 =E 1.30 1.77 2.96 3.10 4.16 4.72 5.00 4.44

Et3+P+W-RE7 =A=Ir 7.42 9.99 16.60 17.32 23.20 26.32 27.93 24.84

A*0.116 =B 0.86 1.16 1.93 2.01 2.69 3.05 3.24 2.88

B*1.25 =C 1.08 1.45 2.41 2.51 3.36 3.82 4.05 3.60

C*1.15 =D 1.24 1.67 2.77 2.89 3.87 4.39 4.66 4.14

D*1.1 =E 1.36 1.83 3.05 3.18 4.26 4.83 5.12 4.56

Et4+P+W-RE8 =A=Ir 10.18 12.40 18.14 18.04 23.27 26.48 28.48 26.02

A*0.116 =B 1.18 1.44 2.10 2.09 2.70 3.07 3.30 3.02

B*1.25 =C 1.48 1.80 2.63 2.62 3.37 3.84 4.13 3.77

C*1.15 =D 1.70 2.07 3.02 3.01 3.88 4.42 4.75 4.34

D*1.1 =E 1.87 2.27 3.33 3.31 4.27 4.86 5.22 4.77

Et5+P-RE9 =A=Ir 9.21 10.97 15.56 14.69 19.01 22.14 24.41 22.68

A*0.116 =B 1.07 1.27 1.81 1.70 2.21 2.57 2.83 2.63


ke7 ET ke 4 w=3,3333


ET ke 5


ET ke 6






ET ke 1 w=3,3333



ke7 ET ke 3 w=3,3333


ke8 ET ke 4 w=3,3333


ET ke 5

B*1.25 =C 1.34 1.59 2.26 2.13 2.76 3.21 3.54 3.29

C*1.15 =D 1.54 1.83 2.59 2.45 3.17 3.69 4.07 3.78

D*1.1 =E 1.69 2.01 2.85 2.69 3.49 4.06 4.48 4.16

Et6+P-RE9 =A=Ir 3.26 4.26 6.83 6.87 9.20 10.58 11.41 10.28

A*0.116 =B 0.38 0.49 0.79 0.80 1.07 1.23 1.32 1.19

B*1.25 =C 0.47 0.62 0.99 1.00 1.33 1.53 1.65 1.49

C*1.15 =D 0.54 0.71 1.14 1.15 1.53 1.76 1.90 1.71

D*1.1 =E 0.60 0.78 1.25 1.26 1.69 1.94 2.09 1.89

Keterangan :

0,11 : Angka konversi dari ( mm / hari ) menjadi ( liter / detik )

1,25 : Kehilangan di saluran petak tersier 25 %

1,15 : Kehilangan di saluran petak sekunder 15 %

1,10 : Kehilangan di bendung bangunan bagi ( saluran primer ) 10 %

C : Kehilangan air di saluran Tersier

D : Kehilangan air di saluran sekunder

E : Kehilangan air di saluran primer


ET ke 5


ET ke 6

PERHITUNGAN KEBUTUHAN AIR TANAMAN PADI PERHITUNGAN KEBUTUHAN AIR TANAMAN PALAWIJA

NOV DES JAN FEB KETERANGAN BULAN

7.153 6.537 4.976 5.404 EVAPORASI (Eo)

1.00 1.00 1.00 1.00 PERKOLASI (P)

8.153 7.537 5.976 6.404 Eo+P

12.581 22.272 25.373 22.435 Rh=HUJAN(1 IN 5 DRY)=XT/JML HARI

1.510 2.673 3.045 2.692

TABEL 1.c mm/hr

1 0.12

4.403 7.795 8.881 7.852 2 0.35

6.039 10.690 12.179 10.769 3 0.48

6.291 11.136 12.687 11.218 4 0.50

5.033 8.909 10.149 8.974 5 0.40

5.033 8.909 10.149 8.974 6 0.40

5.033 8.909 10.149 8.974 7 0.40

3.397 6.013 6.851 6.058 8 0.27

1.636 2.895 3.299 2.917 9 0.13

8.584 7.845 5.971 6.485

TABEL 1.b mm/hr

1 0.50

9.085 8.302 6.320 6.863 2 0.75

9.514 8.694 6.618 7.187 3 1.00

9.299 8.498 6.469 7.025 4 1.00

8.226 7.518 5.723 6.214 5 0.82

0.000 0.000 0.000 0.000 6 0.45NOV DES JAN FEB TANAMAN PALAWIJA

GOLONGAN 1 GOLONGAN 1

11.70 11.60 10.80 10.90 LP

10.19 8.93 7.76 8.21 LP-RE1 =A=Ir

1.18 1.04 0.90 0.95 A*0.116 =B

1.48 1.29 1.12 1.19 B*1.25 =C

1.70 1.49 1.29 1.37 C*1.15 =D

1.87 1.64 1.42 1.51 D*1.1 =E

11.70 11.60 10.80 10.90 Et1+P-RE2 =A=Ir

7.30 3.80 1.92 3.05 A*0.116 =B

0.85 0.44 0.22 0.35 B*1.25 =C

1.06 0.55 0.28 0.44 C*1.15 =D

1.22 0.63 0.32 0.51 D*1.1 =E

1.34 0.70 0.35 0.56 Et2+P-RE3 =A=Ir

6.88 1.49 -1.87 0.05 A*0.116 =B

0.80 0.17 -0.22 0.01 B*1.25 =C

1.00 0.22 -0.27 0.01 C*1.15 =D

1.15 0.25 -0.31 0.01 D*1.1 =E

1.26 0.27 -0.34 0.01 Et3+P-RE4 =A=Ir

7.12 1.50 -2.04 -0.02 A= mm/hari A*0.116 =B

0.83 0.17 -0.24 0.00 B= lt/dt B*1.25 =C

1.03 0.22 -0.30 0.00 C= lt/dt C*1.15 =D

1.19 0.25 -0.34 0.00 D= lt/dt D*1.1 =E

1.31 0.27 -0.37 0.00 E= lt/dt Et4+P-RE5 =A=Ir

8.81 4.12 0.80 2.54 A= mm/hari A*0.116 =B

1.02 0.48 0.09 0.29 B= lt/dt B*1.25 =C

HASIL PERHITUNGAN mm/hari

Faktor Hujan

dengan 3 gol (FH) tiap 2 mingguan

HUJAN EFEKTIF Re= hujan * FH

KOEFISIEN PALAWIJA (KACANG KEDELAI)

(Kc)

Evapotranspirasi ET = Eo * Kc

TABEL ZYLSTRA Berdasarkan Eo+P

mm/hari




mm/hari


ET ke 1 w=3,3333


W=3.33 mm/hari kebutuhan air untuk penggantian air genangan saat pemupukan


ke4 ET ke 3 w=3,3333


ke5 ET ke 4 w=3,3333

1.28 0.60 0.12 0.37 C= lt/dt C*1.15 =D

1.47 0.69 0.13 0.42 D= lt/dt D*1.1 =E

1.62 0.75 0.15 0.47 E= lt/dt Et5+P-RE6 =A=Ir

8.60 3.92 0.65 2.38 A= mm/hari A*0.116 =B

1.00 0.45 0.08 0.28 B= lt/dt B*1.25 =C

1.25 0.57 0.09 0.35 C= lt/dt C*1.15 =D

1.43 0.65 0.11 0.40 D= lt/dt D*1.1 =E

1.58 0.72 0.12 0.44 E= lt/dt GOLONGAN 2

4.19 -0.39 -3.43 -1.76 A= mm/hari LP

0.49 -0.05 -0.40 -0.20 B= lt/dt LP-RE2 =A=Ir

0.61 -0.06 -0.50 -0.26 C= lt/dt A*0.116 =B

0.70 -0.07 -0.57 -0.29 D= lt/dt B*1.25 =C

0.77 -0.07 -0.63 -0.32 E= lt/dt C*1.15 =D

-2.40 -5.01 -5.85 -5.06 A= mm/hari D*1.1 =E

-0.28 -0.58 -0.68 -0.59 B= lt/dt Et1+P-RE3 =A=Ir

-0.35 -0.73 -0.85 -0.73 C= lt/dt A*0.116 =B

-0.40 -0.84 -0.98 -0.84 D= lt/dt B*1.25 =C

-0.44 -0.92 -1.07 -0.93 E= lt/dt C*1.15 =DGOLONGAN 2 D*1.1 =E

11.70 11.60 10.80 10.90 Et2+P-RE4 =A=Ir

7.30 3.80 1.92 3.05 A*0.116 =B

0.85 0.44 0.22 0.35 B*1.25 =C

1.06 0.55 0.28 0.44 C*1.15 =D

1.22 0.63 0.32 0.51 D*1.1 =E

1.34 0.70 0.35 0.56 Et3+P-RE5 =A=Ir

11.70 11.60 10.80 10.90 A*0.116 =B

5.66 0.91 -1.38 0.13 B*1.25 =C

0.66 0.11 -0.16 0.02 C*1.15 =D

0.82 0.13 -0.20 0.02 D*1.1 =E

0.94 0.15 -0.23 0.02 Et4+P-RE6 =A=Ir

1.04 0.17 -0.25 0.02 A*0.116 =B

13.16 6.02 3.02 -1.40 B*1.25 =C

1.53 0.70 0.35 -0.16 C*1.15 =D

1.91 0.87 0.44 -0.20 D*1.1 =E

2.20 1.00 0.50 -0.23 Et5+P-RE7 =A=Ir

2.41 1.10 0.55 -0.26 A*0.116 =B

15.54 10.26 5.48 7.63 A= mm/hari B*1.25 =C

1.80 1.19 0.64 0.88 B= lt/dt C*1.15 =D

2.25 1.49 0.79 1.11 C= lt/dt D*1.1 =E

2.59 1.71 0.91 1.27 D= lt/dt GOLONGAN 3

2.85 1.88 1.01 1.40 E= lt/dt LP

15.97 10.66 5.78 7.95 A= mm/hari LP-RE3 =A=Ir

1.85 1.24 0.67 0.92 B= lt/dt A*0.116 =B

2.32 1.55 0.84 1.15 C= lt/dt B*1.25 =C

2.66 1.78 0.96 1.33 D= lt/dt C*1.15 =D

2.93 1.95 1.06 1.46 E= lt/dt D*1.1 =E

15.75 10.46 5.63 7.79 A= mm/hari Et1+P-RE4 =A=Ir

1.83 1.21 0.65 0.90 B= lt/dt A*0.116 =B


ke5 ET ke 4 w=3,3333


ET ke 5




ET ke 1 w=3,3333


mm/hari



ke5 ET ke 3 w=3,3333TABEL ZYLSTRA

Berdasarkan Eo+P mm/hari


ke6 ET ke 4 w=3,3333W=3.33 mm/hari

kebutuhan air untuk penggantian air genangan saat pemupukan


ET ke 5




ET ke 1 w=3,3333

2.28 1.52 0.82 1.13 C= lt/dt B*1.25 =C

2.63 1.74 0.94 1.30 D= lt/dt C*1.15 =D

2.89 1.92 1.03 1.43 E= lt/dt D*1.1 =E


1.51 1.05 0.56 0.76 B= lt/dt A*0.116 =B

1.88 1.31 0.70 0.95 C= lt/dt B*1.25 =C

2.16 1.51 0.81 1.09 D= lt/dt C*1.15 =D

2.38 1.66 0.89 1.20 E= lt/dt D*1.1 =E


0.76 0.54 0.31 0.40 B= lt/dt A*0.116 =B

0.95 0.67 0.39 0.51 C= lt/dt B*1.25 =C

1.09 0.77 0.45 0.58 D= lt/dt C*1.15 =D

1.20 0.85 0.49 0.64 E= lt/dt D*1.1 =EGOLONGAN 3 Et4+P-RE7 =A=Ir

11.70 11.60 10.80 10.90 A*0.116 =B

5.66 0.91 -1.38 0.13 B*1.25 =C

0.66 0.11 -0.16 0.02 C*1.15 =D

0.82 0.13 -0.20 0.02 D*1.1 =E

0.94 0.15 -0.23 0.02 Et5+P-RE8 =A=Ir

1.04 0.17 -0.25 0.02 A*0.116 =B

11.70 11.60 10.80 10.90 B*1.25 =C

5.41 0.46 -1.89 -0.32 C*1.15 =D

0.63 0.05 -0.22 -0.04 D*1.1 =E

0.78 0.07 -0.27 -0.05

0.90 0.08 -0.31 -0.05 Keterangan :

0.99 0.09 -0.35 -0.06 0,11 : Angka konversi dari ( mm / hari ) menjadi ( liter / detik )

15.04 9.81 5.13 7.25 1,25 : Kehilangan di saluran petak tersier 25 %

1.74 1.14 0.60 0.84 1,15 : Kehilangan di saluran petak sekunder 15 %

2.18 1.42 0.74 1.05 1,10 : Kehilangan di bendung bangunan bagi ( saluran primer ) 10 %

2.51 1.64 0.86 1.21 C : Kehilangan air di saluran Tersier

2.76 1.80 0.94 1.33 D : Kehilangan air di saluran sekunder

15.54 10.26 5.48 7.63 A= mm/hari E : Kehilangan air di saluran primer

1.80 1.19 0.64 0.88 B= lt/dt

2.25 1.49 0.79 1.11 C= lt/dt

2.59 1.71 0.91 1.27 D= lt/dt

2.85 1.88 1.01 1.40 E= lt/dt

15.97 10.66 5.78 7.95 A= mm/hari

1.85 1.24 0.67 0.92 B= lt/dt

2.32 1.55 0.84 1.15 C= lt/dt

2.66 1.78 0.96 1.33 D= lt/dt

2.93 1.95 1.06 1.46 E= lt/dt

17.39 13.36 8.93 10.70 A= mm/hari

2.02 1.55 1.04 1.24 B= lt/dt

2.52 1.94 1.29 1.55 C= lt/dt

2.90 2.23 1.49 1.79 D= lt/dt

3.19 2.45 1.64 1.96 E= lt/dt

14.74 12.16 8.40 9.70 A= mm/hari

1.71 1.41 0.97 1.13 B= lt/dt


ET ke 1 w=3,3333



ke6 ET ke 3 w=3,3333


ke7 ET ke 4 w=3,3333TABEL ZYLSTRA

Berdasarkan Eo+P mm/hari


ET ke 5


mm/hari


2.14 1.76 1.22 1.41 C= lt/dt

2.46 2.03 1.40 1.62 D= lt/dt

2.70 2.23 1.54 1.78 E= lt/dt

6.52 4.64 2.68 3.49 A= mm/hari

0.76 0.54 0.31 0.40 B= lt/dt

0.95 0.67 0.39 0.51 C= lt/dt

1.09 0.77 0.45 0.58 D= lt/dt

1.20 0.85 0.49 0.64 E= lt/dt

PERHITUNGAN KEBUTUHAN AIR TANAMAN PALAWIJA

MAR APR MEI JUN JUL AGT SEP OKT NOV DES JAN FEB

5.172 5.841 7.591 6.799 8.528 10.045 11.304 10.783 7.153 6.537 4.976 5.404

1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00

6.172 6.841 8.591 7.799 9.528 11.045 12.304 11.783 8.153 7.537 5.976 6.404

22.406 19.884 13.542 7.135 2.512 3.540 6.853 11.533 12.581 22.272 25.373 22.435

2.689 2.386 1.625 0.856 0.301 0.425 0.822 1.384 1.510 2.673 3.045 2.692

7.842 6.960 4.740 2.497 0.879 1.239 2.398 4.037 4.403 7.795 8.881 7.852

10.755 9.545 6.500 3.425 1.206 1.699 3.289 5.536 6.039 10.690 12.179 10.769

11.203 9.942 6.771 3.567 1.256 1.770 3.426 5.767 6.291 11.136 12.687 11.218

8.962 7.954 5.417 2.854 1.005 1.416 2.741 4.613 5.033 8.909 10.149 8.974

8.962 7.954 5.417 2.854 1.005 1.416 2.741 4.613 5.033 8.909 10.149 8.974

8.962 7.954 5.417 2.854 1.005 1.416 2.741 4.613 5.033 8.909 10.149 8.974

6.050 5.369 3.656 1.926 0.678 0.956 1.850 3.114 3.397 6.013 6.851 6.058

2.913 2.585 1.760 0.928 0.326 0.460 0.891 1.499 1.636 2.895 3.299 2.917

2.586 2.921 3.796 3.399 4.264 5.022 5.652 5.391 3.577 3.269 2.488 2.702

3.879 4.381 5.694 5.099 6.396 7.533 8.478 8.087 5.365 4.903 3.732 4.053

5.172 5.841 7.591 6.799 8.528 10.045 11.304 10.783 7.153 6.537 4.976 5.404

5.172 5.841 7.591 6.799 8.528 10.045 11.304 10.783 7.153 6.537 4.976 5.404

4.241 4.790 6.225 5.575 6.993 8.237 9.269 8.842 5.866 5.360 4.080 4.431

2.327 2.629 3.416 3.059 3.838 4.520 5.087 4.852 3.219 2.942 2.239 2.432MAR APR MEI JUN JUL AGT SEP OKT NOV DES JAN FEB

GOLONGAN 1

11.00 11.00 10.70 11.20 12.53 10.70 11.00 11.80 11.70 11.60 10.80 10.90

8.31 8.61 9.07 10.34 12.23 10.28 10.18 10.42 10.19 8.93 7.76 8.21

0.96 1.00 1.05 1.20 1.42 1.19 1.18 1.21 1.18 1.04 0.90 0.95

1.21 1.25 1.32 1.50 1.77 1.49 1.48 1.51 1.48 1.29 1.12 1.19

1.39 1.44 1.51 1.72 2.04 1.71 1.70 1.74 1.70 1.49 1.29 1.37

1.52 1.58 1.66 1.90 2.24 1.88 1.87 1.91 1.87 1.64 1.42 1.51

-4.26 -3.04 0.06 1.90 4.39 4.78 4.25 2.35 0.17 -3.53 -5.39 -4.15

-0.49 -0.35 0.01 0.22 0.51 0.55 0.49 0.27 0.02 -0.41 -0.63 -0.48

-0.62 -0.44 0.01 0.28 0.64 0.69 0.62 0.34 0.03 -0.51 -0.78 -0.60

-0.71 -0.51 0.01 0.32 0.73 0.80 0.71 0.39 0.03 -0.59 -0.90 -0.69

-0.78 -0.56 0.01 0.35 0.80 0.88 0.78 0.43 0.03 -0.65 -0.99 -0.76

-5.88 -4.16 0.19 2.67 6.19 6.83 6.19 3.55 0.33 -4.79 -7.45 -5.72

-0.68 -0.48 0.02 0.31 0.72 0.79 0.72 0.41 0.04 -0.56 -0.86 -0.66

-0.85 -0.60 0.03 0.39 0.90 0.99 0.90 0.51 0.05 -0.69 -1.08 -0.83

-0.98 -0.69 0.03 0.45 1.03 1.14 1.03 0.59 0.05 -0.80 -1.24 -0.95

-1.08 -0.76 0.04 0.49 1.14 1.25 1.14 0.65 0.06 -0.88 -1.37 -1.05

-5.03 -3.10 1.82 4.23 8.27 9.27 8.88 6.02 1.86 -3.60 -6.71 -4.81

-0.58 -0.36 0.21 0.49 0.96 1.08 1.03 0.70 0.22 -0.42 -0.78 -0.56

-0.73 -0.45 0.26 0.61 1.20 1.34 1.29 0.87 0.27 -0.52 -0.97 -0.70

-0.84 -0.52 0.30 0.71 1.38 1.55 1.48 1.00 0.31 -0.60 -1.12 -0.80

-0.92 -0.57 0.33 0.78 1.52 1.70 1.63 1.10 0.34 -0.66 -1.23 -0.88

-2.79 -1.11 3.17 4.94 8.52 9.63 9.56 7.17 3.12 -1.37 -4.17 -2.57

-0.32 -0.13 0.37 0.57 0.99 1.12 1.11 0.83 0.36 -0.16 -0.48 -0.30

-0.40 -0.16 0.46 0.72 1.24 1.40 1.39 1.04 0.45 -0.20 -0.61 -0.37

-0.47 -0.19 0.53 0.82 1.42 1.61 1.59 1.20 0.52 -0.23 -0.70 -0.43

-0.51 -0.20 0.58 0.91 1.56 1.77 1.75 1.32 0.57 -0.25 -0.77 -0.47

-3.72 -2.16 1.81 3.72 6.99 7.82 7.53 5.23 1.83 -2.55 -5.07 -3.54

-0.43 -0.25 0.21 0.43 0.81 0.91 0.87 0.61 0.21 -0.30 -0.59 -0.41

-0.54 -0.31 0.26 0.54 1.01 1.13 1.09 0.76 0.27 -0.37 -0.73 -0.51

-0.62 -0.36 0.30 0.62 1.17 1.30 1.26 0.87 0.31 -0.42 -0.85 -0.59

-0.68 -0.40 0.33 0.68 1.28 1.43 1.38 0.96 0.34 -0.47 -0.93 -0.65GOLONGAN 2

11.00 11.00 10.70 11.20 7.28 10.70 11.00 11.80 11.70 11.60 10.80 10.90

3.16 4.04 5.96 8.70 6.41 9.46 8.60 7.76 7.30 3.80 1.92 3.05

0.37 0.47 0.69 1.01 0.74 1.10 1.00 0.90 0.85 0.44 0.22 0.35

0.46 0.59 0.86 1.26 0.93 1.37 1.25 1.13 1.06 0.55 0.28 0.44

0.53 0.67 0.99 1.45 1.07 1.58 1.43 1.29 1.22 0.63 0.32 0.51

0.58 0.74 1.09 1.60 1.17 1.74 1.58 1.42 1.34 0.70 0.35 0.56

-1.33 1.97 5.09 9.50 14.10 15.63 14.15 8.01 5.07 -1.45 -3.29 -8.07

-0.15 0.23 0.59 1.10 1.64 1.81 1.64 0.93 0.59 -0.17 -0.38 -0.94

-0.19 0.29 0.74 1.38 2.04 2.27 2.05 1.16 0.74 -0.21 -0.48 -1.17

-0.22 0.33 0.85 1.58 2.35 2.61 2.36 1.34 0.85 -0.24 -0.55 -1.35

-0.24 0.36 0.93 1.74 2.59 2.87 2.59 1.47 0.93 -0.27 -0.60 -1.48

-1.15 1.28 7.51 9.33 14.67 16.81 17.36 14.10 7.23 1.30 -2.98 -0.76

-0.13 0.15 0.87 1.08 1.70 1.95 2.01 1.64 0.84 0.15 -0.35 -0.09

-0.17 0.19 1.09 1.35 2.13 2.44 2.52 2.04 1.05 0.19 -0.43 -0.11

-0.19 0.21 1.25 1.56 2.45 2.80 2.89 2.35 1.21 0.22 -0.50 -0.13

-0.21 0.23 1.38 1.71 2.69 3.08 3.18 2.59 1.33 0.24 -0.55 -0.14

2.38 4.73 10.77 11.74 17.05 19.67 20.87 17.95 10.27 5.17 0.80 2.83

0.28 0.55 1.25 1.36 1.98 2.28 2.42 2.08 1.19 0.60 0.09 0.33

0.35 0.69 1.56 1.70 2.47 2.85 3.03 2.60 1.49 0.75 0.12 0.41

0.40 0.79 1.80 1.96 2.84 3.28 3.48 2.99 1.71 0.86 0.13 0.47

0.44 0.87 1.97 2.15 3.13 3.61 3.83 3.29 1.88 0.95 0.15 0.52

2.38 4.73 10.77 11.74 17.05 19.67 20.87 17.95 10.27 5.17 0.80 2.83

0.28 0.55 1.25 1.36 1.98 2.28 2.42 2.08 1.19 0.60 0.09 0.33

0.35 0.69 1.56 1.70 2.47 2.85 3.03 2.60 1.49 0.75 0.12 0.41

0.40 0.79 1.80 1.96 2.84 3.28 3.48 2.99 1.71 0.86 0.13 0.47

0.44 0.87 1.97 2.15 3.13 3.61 3.83 3.29 1.88 0.95 0.15 0.52

1.45 3.68 9.40 10.52 15.52 17.87 18.83 16.01 8.99 3.99 -0.09 1.86

0.17 0.43 1.09 1.22 1.80 2.07 2.18 1.86 1.04 0.46 -0.01 0.22

0.21 0.53 1.36 1.53 2.25 2.59 2.73 2.32 1.30 0.58 -0.01 0.27

0.24 0.61 1.57 1.75 2.59 2.98 3.14 2.67 1.50 0.67 -0.02 0.31

0.27 0.67 1.72 1.93 2.85 3.28 3.45 2.94 1.65 0.73 -0.02 0.34GOLONGAN 3

11.00 11.00 10.70 11.20 7.98 10.70 11.00 11.80 11.70 11.60 10.80 10.90

0.25 1.46 4.20 7.78 6.77 9.00 7.71 6.26 5.66 0.91 -1.38 0.13

0.03 0.17 0.49 0.90 0.79 1.04 0.89 0.73 0.66 0.11 -0.16 0.02

0.04 0.21 0.61 1.13 0.98 1.31 1.12 0.91 0.82 0.13 -0.20 0.02

0.04 0.24 0.70 1.30 1.13 1.50 1.29 1.04 0.94 0.15 -0.23 0.02

0.04 0.27 0.77 1.43 1.24 1.65 1.41 1.15 1.04 0.17 -0.25 0.02

-2.44 -0.18 5.62 7.63 12.54 14.30 14.53 11.41 5.44 -0.33 -4.22 -2.11

-0.28 -0.02 0.65 0.89 1.45 1.66 1.69 1.32 0.63 -0.04 -0.49 -0.24

-0.35 -0.03 0.81 1.11 1.82 2.07 2.11 1.65 0.79 -0.05 -0.61 -0.31

-0.41 -0.03 0.94 1.27 2.09 2.38 2.42 1.90 0.91 -0.06 -0.70 -0.35

-0.45 -0.03 1.03 1.40 2.30 2.62 2.67 2.09 1.00 -0.06 -0.77 -0.39

1.09 3.27 8.87 10.04 14.92 17.16 18.04 15.26 8.49 3.53 -0.44 1.48

0.13 0.38 1.03 1.17 1.73 1.99 2.09 1.77 0.98 0.41 -0.05 0.17

0.16 0.47 1.29 1.46 2.16 2.49 2.62 2.21 1.23 0.51 -0.06 0.21

0.18 0.55 1.48 1.67 2.49 2.86 3.01 2.54 1.42 0.59 -0.07 0.25

0.20 0.60 1.63 1.84 2.74 3.15 3.31 2.80 1.56 0.65 -0.08 0.27

2.38 4.73 10.77 11.74 17.05 19.67 20.87 17.95 10.27 5.17 0.80 2.83

0.28 0.55 1.25 1.36 1.98 2.28 2.42 2.08 1.19 0.60 0.09 0.33

0.35 0.69 1.56 1.70 2.47 2.85 3.03 2.60 1.49 0.75 0.12 0.41

0.40 0.79 1.80 1.96 2.84 3.28 3.48 2.99 1.71 0.86 0.13 0.47

0.44 0.87 1.97 2.15 3.13 3.61 3.83 3.29 1.88 0.95 0.15 0.52

2.38 4.73 10.77 11.74 17.05 19.67 20.87 17.95 10.27 5.17 0.80 2.83

0.28 0.55 1.25 1.36 1.98 2.28 2.42 2.08 1.19 0.60 0.09 0.33

0.35 0.69 1.56 1.70 2.47 2.85 3.03 2.60 1.49 0.75 0.12 0.41

0.40 0.79 1.80 1.96 2.84 3.28 3.48 2.99 1.71 0.86 0.13 0.47

0.44 0.87 1.97 2.15 3.13 3.61 3.83 3.29 1.88 0.95 0.15 0.52

4.36 6.26 11.16 11.45 15.84 18.33 19.72 17.51 10.62 6.88 3.21 4.78

0.51 0.73 1.29 1.33 1.84 2.13 2.29 2.03 1.23 0.80 0.37 0.55

0.63 0.91 1.62 1.66 2.30 2.66 2.86 2.54 1.54 1.00 0.46 0.69

0.73 1.04 1.86 1.91 2.64 3.06 3.29 2.92 1.77 1.15 0.53 0.80

0.80 1.15 2.05 2.10 2.91 3.36 3.62 3.21 1.95 1.26 0.59 0.88

: Angka konversi dari ( mm / hari ) menjadi ( liter / detik )

: Kehilangan di saluran petak tersier 25 %

: Kehilangan di saluran petak sekunder 15 %

: Kehilangan di bendung bangunan bagi ( saluran primer ) 10 %

: Kehilangan air di saluran Tersier

: Kehilangan air di saluran sekunder

: Kehilangan air di saluran primer

PERHITUNGAN KEBUTUHAN AIR TANAMAN PALAWIJA

KETERANGAN

TABEL 1.c mm/hr

TABEL 1.b mm/hr

GOLONGAN 1

A= mm/hari

B= lt/dt

C= lt/dt

D= lt/dt

E= lt/dt

A= mm/hari

B= lt/dt

C= lt/dt

D= lt/dt

E= lt/dt

A= mm/hari

B= lt/dt

C= lt/dt

HASIL PERHITUNGAN

mm/hari


mm/hari


D= lt/dt

E= lt/dt

A= mm/hari

B= lt/dt

C= lt/dt

D= lt/dt

E= lt/dt

GOLONGAN 2

A= mm/hari

B= lt/dt

C= lt/dt

D= lt/dt

E= lt/dt

A= mm/hari

B= lt/dt

C= lt/dt

D= lt/dt

E= lt/dt

A= mm/hari

B= lt/dt

C= lt/dt

D= lt/dt

E= lt/dt

A= mm/hari

B= lt/dt

C= lt/dt

D= lt/dt

E= lt/dt

GOLONGAN 3


mm/hari



mm/hari

A= mm/hari

B= lt/dt

C= lt/dt

D= lt/dt

E= lt/dt

A= mm/hari

B= lt/dt

C= lt/dt

D= lt/dt

E= lt/dt

A= mm/hari

B= lt/dt

C= lt/dt

D= lt/dt

E= lt/dt

A= mm/hari

B= lt/dt

C= lt/dt

D= lt/dt

E= lt/dt

Documents

Data Irigasi