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Perhitungan Unit Hidrograf Metode Nakayasu Parameter HSS Nakayasu 1 Luas DAS ( A ) Panjang Sungai Utama ( L ) 2 Parameter Alfa ( a ) 3 Koefisien Pengaliran ( C ) 4 Ro 5
= = = = =
280 km2 23 km 3 0.45 1 mm
Parameter Bentuk Hidrograf Menghitung waktu antara hujan samapi debit puncak banjir (tg) tg = 0.4 + 0.058 L = 1.73 jam Menghitung waktu untuk mencapai puncak (Tp) tr = 0.75*tg Tp = tg + (0,8 * tr)
Menghitung besarnya T0,3 T0,3 = a * tg 1,5 * T0,3 2 * T0,3
=
1.30 jam
= =
2.77 jam 3 jam
= = = =
5.20 jam 5 jam 7.80 jam 8 jam 10.40 jam 10
=
Menghitung debit maksimum hidrograf satuan (Qp) Qp = (CA * Ro) / (3,6 * ((0,3 * Tp) + T0,3) Perhitungan besarnya Qb D Qb (0,4751 A0,6444 D0,943)
=
= =
12.89 m3/dt
0.63 11.60 m3/dt
Tabel 7.3. Ordinat Hidrograf Satuan Sintetik Nakayasu T (jam)
Q (m3/dt/mm)
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 16.00 17.00 18.00 19.00 20.00 21.00 22.00 23.00 24.00 25.00 26.00 27.00 28.00 29.00 30.00 31.00 32.00 33.00 34.00 35.00 36.00 37.00 38.00 39.00 40.00 41.00 42.00
0.000 1.113 5.876 12.889 9.706 7.701 6.110 4.847 3.846 3.302 2.830 2.425 2.078 1.781 1.527 1.308 1.121 1.007 0.897 0.799 0.712 0.634 0.565 0.503 0.448 0.399 0.355 0.317 0.282 0.251 0.224 0.199 0.178 0.158 0.141 0.125 0.112 0.100 0.089 0.079 0.070 0.063 0.056
Keterangan Qa Qp
Qd1
Qd2
Qd3
Tp
Qd3
43.00 44.00 45.00 46.00 47.00 48.00
0.050 0.044 0.039 0.035 0.031 0.028
Tabel 7.4. Perhitungan Hidrograf Debit Banjir Rancangan Dengan Kala Ulang 2 Tahun (Met
T
Hujan Jam - Jaman (mm)
U(t,1) m3/det/mm
0.00
0.000
1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 16.00 17.00 18.00 19.00 20.00 21.00 22.00 23.00 24.00 25.00 26.00 27.00 28.00 29.00 30.00 31.00 32.00 33.00 34.00 35.00 36.00 37.00 38.00
1.113 5.876 12.889 9.706 7.701 6.110 4.847 3.846 3.302 2.830 2.425 2.078 1.781 1.527 1.308 1.121 1.007 0.897 0.799 0.712 0.634 0.565 0.503 0.448 0.399 0.355 0.317 0.282 0.251 0.224 0.199 0.178 0.158 0.141 0.125 0.112 0.100 0.089
R1
R2
R3
R4
R5
61.970
16.107
11.299
8.995
7.596
68.993 364.148 798.752 601.479 477.206 378.609 300.383 238.320 204.617 175.360 150.287 128.799 110.383 94.600 81.074 69.482 62.418 55.597 49.522 44.110 39.290 34.996 31.172 27.766 24.731 22.029 19.622 17.477 15.568 13.866 12.351 11.001 9.799 8.728 7.775 6.925 6.168 5.494
17.933 94.650 207.612 156.337 124.036 98.408 78.076 61.944 53.184 45.580 39.063 33.478 28.691 24.589 21.073 18.060 16.224 14.451 12.872 11.465 10.212 9.096 8.102 7.217 6.428 5.726 5.100 4.543 4.046 3.604 3.210 2.859 2.547 2.269 2.021 1.800 1.603
12.579 66.395 145.635 109.667 87.008 69.031 54.768 43.453 37.308 31.973 27.402 23.484 20.126 17.248 14.782 12.669 11.381 10.137 9.029 8.043 7.164 6.381 5.684 5.062 4.509 4.016 3.578 3.187 2.838 2.528 2.252 2.006 1.787 1.591 1.418 1.263
10.014 52.857 115.940 87.306 69.267 54.956 43.601 34.593 29.700 25.454 21.814 18.695 16.022 13.731 11.768 10.085 9.060 8.070 7.188 6.403 5.703 5.080 4.525 4.030 3.590 3.198 2.848 2.537 2.260 2.013 1.793 1.597 1.422 1.267 1.128
8.457 44.635 97.907 73.726 58.493 46.408 36.819 29.212 25.081 21.495 18.421 15.787 13.530 11.596 9.938 8.517 7.651 6.815 6.070 5.407 4.816 4.290 3.821 3.403 3.031 2.700 2.405 2.142 1.908 1.700 1.514 1.348 1.201 1.070
39.00 0.079 40.00 0.070 41.00 0.063 42.00 0.056 43.00 0.050 44.00 0.044 45.00 0.039 46.00 0.035 47.00 0.031 48.00 0.028 Sumber : Hasil Perhitungan
4.894 4.359 3.883 3.458 3.080 2.744 2.444 2.177 1.939 1.727
1.428 1.272 1.133 1.009 0.899 0.801 0.713 0.635 0.566 0.504
1.125 1.002 0.892 0.795 0.708 0.631 0.562 0.500 0.446 0.397
1.005 0.895 0.797 0.710 0.633 0.564 0.502 0.447 0.398 0.355
0.953 0.849 0.756 0.673 0.600 0.534 0.476 0.424 0.378 0.336
t Banjir Rancangan Dengan Kala Ulang 2 Tahun (Metode Nakayasu) Hujan Jam - Jaman (mm)
Base Flow
Q
m3/det
m3/det
11.601
11.601
11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601
80.595 393.682 917.582 897.102 852.093 791.881 721.631 625.604 510.826 424.738 356.754 302.533 258.933 223.609 193.296 167.317 147.923 131.281 117.114 104.984 94.551 85.543 77.463 70.266 63.855 58.145 53.059 48.529 44.493 40.899 37.697 34.846 32.306 30.043 28.028 26.233 24.634 23.210
R6 6.640
7.392 39.017 85.582 64.445 51.130 40.566 32.184 25.535 21.924 18.789 16.102 13.800 11.827 10.136 8.687 7.445 6.688 5.957 5.306 4.726 4.210 3.750 3.340 2.975 2.650 2.360 2.102 1.873 1.668 1.486 1.323 1.179 1.050
0.935 0.833 0.742 0.661 0.589 0.524 0.467 0.416 0.371 0.330
11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601
21.941 20.811 19.805 18.908 18.110 17.399 16.765 16.201 15.698 15.251
Tabel 7.5. Perhitungan Hidrograf Debit Banjir Rancangan Dengan Kala Ulang 5 Tahun (Metode Nakayasu)
T
Base Flow
Q
m3/det
m3/det
0.000
11.601
11.601
1.113 5.876 12.889 9.706 7.701
11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601
92.535 459.808 1074.379 1050.354 997.556
m3/det/mm 0.00 1.00 2.00 3.00 4.00 5.00
Hujan Jam - Jaman (mm)
U(t,1) R1
R2
R3
R4
R5
R6
72.696
18.895
13.254
10.552
8.911
7.789
80.934 427.171 936.990 705.576 559.795
6.00 6.110 444.134 7.00 4.847 352.370 8.00 3.846 279.566 9.00 3.302 240.030 10.00 2.830 205.710 11.00 2.425 176.297 12.00 2.078 151.090 13.00 1.781 129.487 14.00 1.527 110.972 15.00 1.308 95.105 16.00 1.121 81.507 17.00 1.007 73.221 18.00 0.897 65.219 19.00 0.799 58.092 20.00 0.712 51.744 21.00 0.634 46.090 22.00 0.565 41.053 23.00 0.503 36.567 24.00 0.448 32.571 25.00 0.399 29.012 26.00 0.355 25.841 27.00 0.317 23.018 28.00 0.282 20.502 29.00 0.251 18.262 30.00 0.224 16.266 31.00 0.199 14.489 32.00 0.178 12.905 33.00 0.158 11.495 34.00 0.141 10.239 35.00 0.125 9.120 36.00 0.112 8.123 37.00 0.100 7.236 38.00 0.089 6.445 39.00 0.079 5.741 40.00 0.070 5.113 41.00 0.063 4.555 42.00 0.056 4.057 43.00 0.050 3.614 44.00 0.044 3.219 45.00 0.039 2.867 46.00 0.035 2.554 47.00 0.031 2.275 48.00 0.028 2.026 Sumber : Hasil Perhitungan
21.036 111.031 243.544 183.394
14.757 77.885 170.840
11.748 62.004
9.920
145.503 115.440 91.588 72.665 62.389 53.468 45.823 39.271 33.656 28.844 24.720 21.185 19.032 16.952 15.099 13.449 11.980 10.671 9.505 8.466 7.541 6.717 5.983 5.329 4.747 4.228 3.766 3.354 2.988 2.661 2.371 2.111 1.881 1.675 1.492 1.329 1.184 1.054 0.939 0.837 0.745 0.664 0.591
128.647 102.067 80.978 64.247 50.973 43.764 37.507 32.144 27.548 23.609 20.233 17.340 14.861 13.350 11.891 10.592 9.434 8.403 7.485 6.667 5.939 5.290 4.712 4.197 3.738 3.330 2.966 2.642 2.353 2.096 1.867 1.663 1.481 1.319 1.175 1.047 0.932 0.830 0.740 0.659 0.587 0.523 0.466
136.006 102.415 81.255 64.467 51.147 40.579 34.841 29.859 25.590 21.931 18.795 16.108 13.805 11.831 10.628 9.467 8.432 7.511 6.690 5.959 5.308 4.728 4.211 3.751 3.341 2.976 2.651 2.361 2.103 1.873 1.669 1.486 1.324 1.179 1.050 0.936 0.833 0.742 0.661 0.589 0.525 0.467 0.416
52.360 114.851 86.486 68.617 54.440 43.192 34.268 29.422 25.215 21.610 18.520 15.872 13.602 11.658 9.991 8.975 7.994 7.121 6.343 5.649 5.032 4.482 3.992 3.556 3.168 2.821 2.513 2.238 1.994 1.776 1.582 1.409 1.255 1.118 0.996 0.887 0.790 0.704 0.627 0.558 0.497 0.443 0.395
8.672 45.769 100.393 75.599 59.979 47.587 37.755 29.954 25.718 22.041 18.889 16.188 13.874 11.890 10.190 8.733 7.845 6.988 6.224 5.544 4.938 4.399 3.918 3.490 3.108 2.769 2.466 2.197 1.957 1.743 1.552 1.383 1.232 1.097 0.977 0.870 0.775 0.691 0.615 0.548 0.488 0.435 0.387
926.922 844.514 731.869 597.226 496.239 416.489 352.884 301.738 260.301 224.741 194.266 171.516 151.994 135.374 121.145 108.907 98.340 88.862 80.419 72.899 66.200 60.234 54.919 50.186 45.969 42.214 38.869 35.889 33.235 30.871 28.765 26.889 25.219 23.731 22.405 21.225 20.173 19.236 18.402 17.659 16.997 16.407 15.882
Tabel 7.6. Perhitungan Hidrograf Debit Banjir Rancangan Dengan Kala Ulang 10 Tahun (Metode Nakayasu) T
U(t,1)
Hujan Jam - Jaman (mm) R1
m3/det/mm 76.751 0.00 0.000 1.00 1.113 85.448 2.00 5.876 450.999 3.00 12.889 989.258 4.00 9.706 744.935 5.00 7.701 591.022 6.00 6.110 468.909 7.00 4.847 372.026 8.00 3.846 295.161 9.00 3.302 253.419 10.00 2.830 217.185 11.00 2.425 186.131 12.00 2.078 159.518 13.00 1.781 136.710 14.00 1.527 117.163 15.00 1.308 100.411 16.00 1.121 86.054 17.00 1.007 77.305 18.00 0.897 68.857 19.00 0.799 61.333 20.00 0.712 54.631 21.00 0.634 48.661 22.00 0.565 43.343 23.00 0.503 38.607 24.00 0.448 34.388 25.00 0.399 30.630 26.00 0.355 27.283 27.00 0.317 24.301 28.00 0.282 21.646 29.00 0.251 19.280 30.00 0.224 17.174 31.00 0.199 15.297 32.00 0.178 13.625 33.00 0.158 12.136 34.00 0.141 10.810 35.00 0.125 9.629 36.00 0.112 8.577 37.00 0.100 7.639 38.00 0.089 6.805 39.00 0.079 6.061 40.00 0.070 5.399 41.00 0.063 4.809 42.00 0.056 4.283 43.00 0.050 3.815 44.00 0.044 3.398 45.00 0.039 3.027 46.00 0.035 2.696 47.00 0.031 2.402 48.00 0.028 2.139 Sumber : Hasil Perhitungan
R2
R3
R4
R5
R6
19.949
13.994
11.140
9.408
8.223
22.210 117.224 257.129 193.624 153.619 121.879 96.697 76.718 65.869 56.451 48.379 41.462 35.534 30.453 26.099 22.367 20.093 17.897 15.942 14.200 12.648 11.266 10.035 8.938 7.961 7.091 6.316 5.626 5.011 4.464 3.976 3.541 3.154 2.810 2.503 2.229 1.986 1.769 1.575 1.403 1.250 1.113 0.992 0.883 0.787 0.701 0.624
15.580 82.230 180.370 135.823 107.760 85.495 67.831 53.816 46.206 39.599 33.937 29.085 24.926 21.362 18.308 15.690 14.095 12.555 11.183 9.961 8.872 7.903 7.039 6.270 5.585 4.974 4.431 3.947 3.515 3.131 2.789 2.484 2.213 1.971 1.756 1.564 1.393 1.241 1.105 0.984 0.877 0.781 0.696 0.620 0.552 0.492
12.403 65.463 143.592 108.128 85.788 68.063 54.000 42.843 36.784 31.525 27.017 23.154 19.844 17.006 14.575 12.491 11.221 9.995 8.903 7.930 7.063 6.291 5.604 4.991 4.446 3.960 3.527 3.142 2.799 2.493 2.220 1.978 1.762 1.569 1.398 1.245 1.109 0.988 0.880 0.784 0.698 0.622 0.554 0.493 0.439
10.474 55.281 121.258 91.310 72.444 57.476 45.601 36.179 31.063 26.621 22.815 19.553 16.757 14.361 12.308 10.548 9.476 8.440 7.518 6.696 5.965 5.313 4.732 4.215 3.754 3.344 2.979 2.653 2.363 2.105 1.875 1.670 1.488 1.325 1.180 1.051 0.936 0.834 0.743 0.662 0.589 0.525 0.468 0.417
9.155 48.322 105.994 79.816 63.325 50.241 39.861 31.625 27.153 23.270 19.943 17.091 14.648 12.553 10.758 9.220 8.283 7.378 6.571 5.853 5.214 4.644 4.137 3.684 3.282 2.923 2.604 2.319 2.066 1.840 1.639 1.460 1.300 1.158 1.032 0.919 0.819 0.729 0.649 0.578 0.515 0.459 0.409
Base Flow
Q
m3/det 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601
m3/det 11.601 97.050 484.810 1133.663 1108.298 1052.554 977.981 890.976 772.047 629.893 523.273 439.074 371.922 317.923 274.174 236.631 204.456 180.436 159.826 142.279 127.256 114.335 103.179 93.171 84.258 76.318 69.246 62.947 57.336 52.338 47.887 43.921 40.390 37.244 34.442 31.946 29.722 27.742 25.978 24.407 23.008 21.761 20.651 19.662 18.781 17.997 17.298 16.675 16.121
Tabel 7.7. Perhitungan Hidrograf Debit Banjir Rancangan Dengan Kala Ulang 25 Tahun (Metode Nakayasu) T
U(t,1)
Hujan Jam - Jaman (mm) R1
m3/det/mm 80.603 0.00 0.000 1.00 1.113 89.737 2.00 5.876 473.637 3.00 12.889 1038.913 4.00 9.706 782.327 5.00 7.701 620.688 6.00 6.110 492.446 7.00 4.847 390.700 8.00 3.846 309.976 9.00 3.302 266.139 10.00 2.830 228.086 11.00 2.425 195.474 12.00 2.078 167.525 13.00 1.781 143.572 14.00 1.527 123.044 15.00 1.308 105.451 16.00 1.121 90.373 17.00 1.007 81.185 18.00 0.897 72.314 19.00 0.799 64.411 20.00 0.712 57.373 21.00 0.634 51.103 22.00 0.565 45.519 23.00 0.503 40.545 24.00 0.448 36.114 25.00 0.399 32.168 26.00 0.355 28.652 27.00 0.317 25.521 28.00 0.282 22.732 29.00 0.251 20.248 30.00 0.224 18.036 31.00 0.199 16.065 32.00 0.178 14.309 33.00 0.158 12.746 34.00 0.141 11.353 35.00 0.125 10.112 36.00 0.112 9.007 37.00 0.100 8.023 38.00 0.089 7.146 39.00 0.079 6.365 40.00 0.070 5.670 41.00 0.063 5.050 42.00 0.056 4.498 43.00 0.050 4.007 44.00 0.044 3.569 45.00 0.039 3.179 46.00 0.035 2.831 47.00 0.031 2.522 48.00 0.028 2.246 Sumber : Hasil Perhitungan
R2
R3
R4
R5
R6
20.950
14.696
11.700
9.880
8.636
23.325 123.108 270.035 203.343 161.330 127.997 101.551 80.569 69.175 59.284 50.808 43.543 37.317 31.982 27.409 23.490 21.102 18.796 16.742 14.912 13.283 11.831 10.538 9.387 8.361 7.447 6.634 5.909 5.263 4.688 4.176 3.719 3.313 2.951 2.628 2.341 2.085 1.857 1.654 1.474 1.313 1.169 1.041 0.928 0.826 0.736 0.656
16.362 86.358 189.424 142.640 113.169 89.787 71.236 56.518 48.525 41.587 35.641 30.545 26.177 22.434 19.227 16.478 14.802 13.185 11.744 10.461 9.318 8.299 7.392 6.585 5.865 5.224 4.653 4.145 3.692 3.288 2.929 2.609 2.324 2.070 1.844 1.642 1.463 1.303 1.161 1.034 0.921 0.820 0.731 0.651 0.580 0.516
13.026 68.749 150.800 113.556 90.094 71.479 56.711 44.994 38.631 33.107 28.373 24.316 20.840 17.860 15.306 13.118 11.784 10.496 9.349 8.328 7.418 6.607 5.885 5.242 4.669 4.159 3.704 3.300 2.939 2.618 2.332 2.077 1.850 1.648 1.468 1.307 1.165 1.037 0.924 0.823 0.733 0.653 0.582 0.518 0.461
11.000 58.056 127.345 95.894 76.081 60.361 47.890 37.995 32.622 27.958 23.960 20.534 17.598 15.082 12.926 11.077 9.951 8.864 7.895 7.032 6.264 5.579 4.970 4.427 3.943 3.512 3.128 2.786 2.482 2.211 1.969 1.754 1.562 1.392 1.239 1.104 0.983 0.876 0.780 0.695 0.619 0.551 0.491 0.437
9.615 50.748 111.314 83.822 66.503 52.763 41.861 33.212 28.515 24.438 20.944 17.949 15.383 13.183 11.298 9.683 8.699 7.748 6.901 6.147 5.475 4.877 4.344 3.869 3.447 3.070 2.734 2.436 2.169 1.932 1.721 1.533 1.366 1.216 1.083 0.965 0.860 0.766 0.682 0.607 0.541 0.482 0.429
Base Flow
Q
m3/det 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601
m3/det 11.601 101.339 508.563 1189.985 1163.347 1104.805 1026.488 935.116 810.217 660.928 548.956 460.531 390.008 333.298 287.353 247.926 214.136 188.911 167.266 148.838 133.061 119.492 107.775 97.266 87.905 79.566 72.139 65.524 59.631 54.383 49.708 45.544 41.835 38.531 35.588 32.967 30.632 28.552 26.700 25.050 23.581 22.271 21.105 20.067 19.142 18.318 17.584 16.930 16.348
Tabel 7.8. Perhitungan Hidrograf Debit Banjir Rancangan Dengan Kala Ulang 50 Tahun (Metode Nakayasu) T
U(t,1)
Hujan Jam - Jaman (mm) R1
m3/det/mm 82.851 0.00 0.000 1.00 1.113 92.240 2.00 5.876 486.846 3.00 12.889 1067.886 4.00 9.706 804.144 5.00 7.701 637.997 6.00 6.110 506.179 7.00 4.847 401.596 8.00 3.846 318.621 9.00 3.302 273.561 10.00 2.830 234.447 11.00 2.425 200.925 12.00 2.078 172.197 13.00 1.781 147.576 14.00 1.527 126.475 15.00 1.308 108.391 16.00 1.121 92.893 17.00 1.007 83.449 18.00 0.897 74.330 19.00 0.799 66.208 20.00 0.712 58.973 21.00 0.634 52.528 22.00 0.565 46.788 23.00 0.503 41.675 24.00 0.448 37.121 25.00 0.399 33.065 26.00 0.355 29.451 27.00 0.317 26.233 28.00 0.282 23.366 29.00 0.251 20.813 30.00 0.224 18.539 31.00 0.199 16.513 32.00 0.178 14.708 33.00 0.158 13.101 34.00 0.141 11.669 35.00 0.125 10.394 36.00 0.112 9.258 37.00 0.100 8.247 38.00 0.089 7.345 39.00 0.079 6.543 40.00 0.070 5.828 41.00 0.063 5.191 42.00 0.056 4.624 43.00 0.050 4.118 44.00 0.044 3.668 45.00 0.039 3.267 46.00 0.035 2.910 47.00 0.031 2.592 48.00 0.028 2.309 Sumber : Hasil Perhitungan
R2
R3
R4
R5
R6
21.535
15.106
12.026
10.155
8.877
23.975 126.541 277.566 209.014 165.829 131.567 104.383 82.816 71.104 60.938 52.225 44.758 38.358 32.874 28.173 24.145 21.690 19.320 17.209 15.328 13.653 12.161 10.832 9.649 8.594 7.655 6.819 6.073 5.410 4.819 4.292 3.823 3.405 3.033 2.702 2.406 2.143 1.909 1.701 1.515 1.349 1.202 1.070 0.953 0.849 0.756 0.674
16.818 88.766 194.706 146.618 116.325 92.291 73.222 58.094 49.878 42.746 36.634 31.396 26.907 23.060 19.763 16.937 15.215 13.553 12.072 10.752 9.577 8.531 7.599 6.768 6.029 5.370 4.783 4.260 3.795 3.380 3.011 2.682 2.389 2.128 1.895 1.688 1.504 1.339 1.193 1.063 0.946 0.843 0.751 0.669 0.596 0.531
13.389 70.666 155.005 116.723 92.606 73.473 58.292 46.248 39.708 34.030 29.165 24.995 21.421 18.358 15.733 13.484 12.113 10.789 9.610 8.560 7.625 6.791 6.049 5.388 4.799 4.275 3.808 3.392 3.021 2.691 2.397 2.135 1.902 1.694 1.509 1.344 1.197 1.066 0.950 0.846 0.753 0.671 0.598 0.532 0.474
11.306 59.675 130.896 98.568 78.202 62.045 49.226 39.055 33.532 28.737 24.628 21.107 18.089 15.503 13.286 11.386 10.229 9.111 8.115 7.229 6.439 5.735 5.108 4.550 4.053 3.610 3.216 2.864 2.551 2.272 2.024 1.803 1.606 1.430 1.274 1.135 1.011 0.900 0.802 0.714 0.636 0.567 0.505 0.450
9.883 52.163 114.418 86.160 68.358 54.234 43.029 34.139 29.311 25.120 21.528 18.450 15.812 13.551 11.614 9.953 8.941 7.964 7.094 6.319 5.628 5.013 4.465 3.977 3.543 3.156 2.811 2.504 2.230 1.986 1.769 1.576 1.404 1.250 1.114 0.992 0.884 0.787 0.701 0.624 0.556 0.495 0.441
Base Flow
Q
m3/det 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601
m3/det 11.601 103.841 522.422 1222.847 1195.466 1135.292 1054.791 960.871 832.489 679.036 563.942 473.051 400.561 342.270 295.044 254.517 219.784 193.856 171.607 152.665 136.448 122.501 110.458 99.655 90.033 81.462 73.828 67.028 60.971 55.576 50.771 46.490 42.678 39.282 36.257 33.563 31.163 29.025 27.121 25.425 23.915 22.569 21.371 20.303 19.352 18.505 17.751 17.079 16.480
Tabel 7.9. Perhitungan Hidrograf Debit Banjir Rancangan Dengan Kala Ulang 100 Tahun (Metode Nakayasu) T
U(t,1)
Hujan Jam - Jaman (mm) R1
m3/det/mm 84.701 0.00 0.000 1.00 1.113 94.299 2.00 5.876 497.714 3.00 12.889 1091.727 4.00 9.706 822.097 5.00 7.701 652.241 6.00 6.110 517.479 7.00 4.847 410.561 8.00 3.846 325.734 9.00 3.302 279.669 10.00 2.830 239.681 11.00 2.425 205.411 12.00 2.078 176.041 13.00 1.781 150.870 14.00 1.527 129.299 15.00 1.308 110.811 16.00 1.121 94.967 17.00 1.007 85.312 18.00 0.897 75.990 19.00 0.799 67.686 20.00 0.712 60.289 21.00 0.634 53.701 22.00 0.565 47.833 23.00 0.503 42.606 24.00 0.448 37.950 25.00 0.399 33.803 26.00 0.355 30.109 27.00 0.317 26.819 28.00 0.282 23.888 29.00 0.251 21.278 30.00 0.224 18.952 31.00 0.199 16.881 32.00 0.178 15.037 33.00 0.158 13.393 34.00 0.141 11.930 35.00 0.125 10.626 36.00 0.112 9.465 37.00 0.100 8.431 38.00 0.089 7.509 39.00 0.079 6.689 40.00 0.070 5.958 41.00 0.063 5.307 42.00 0.056 4.727 43.00 0.050 4.210 44.00 0.044 3.750 45.00 0.039 3.340 46.00 0.035 2.975 47.00 0.031 2.650 48.00 0.028 2.361 Sumber : Hasil Perhitungan
R2
R3
R4
R5
R6
22.015
15.443
12.294
10.382
9.075
24.510 129.366 283.763 213.680 169.531 134.504 106.714 84.665 72.692 62.298 53.391 45.757 39.214 33.607 28.802 24.684 22.174 19.751 17.593 15.670 13.958 12.433 11.074 9.864 8.786 7.826 6.971 6.209 5.530 4.926 4.388 3.908 3.481 3.101 2.762 2.460 2.191 1.952 1.739 1.549 1.379 1.229 1.094 0.975 0.868 0.773 0.689
17.193 90.748 199.053 149.892 118.922 94.351 74.857 59.391 50.992 43.701 37.452 32.097 27.508 23.575 20.204 17.315 15.555 13.855 12.341 10.992 9.791 8.721 7.768 6.919 6.163 5.490 4.890 4.355 3.880 3.456 3.078 2.742 2.442 2.175 1.937 1.726 1.537 1.369 1.220 1.086 0.968 0.862 0.768 0.684 0.609 0.543
13.688 72.244 158.466 119.329 94.674 75.113 59.594 47.281 40.594 34.790 29.816 25.553 21.899 18.768 16.084 13.785 12.383 11.030 9.825 8.751 7.795 6.943 6.184 5.508 4.907 4.370 3.893 3.467 3.088 2.751 2.450 2.183 1.944 1.732 1.542 1.374 1.224 1.090 0.971 0.865 0.770 0.686 0.611 0.544 0.485
11.559 61.007 133.818 100.768 79.948 63.430 50.325 39.927 34.280 29.379 25.178 21.578 18.493 15.849 13.583 11.641 10.457 9.314 8.297 7.390 6.582 5.863 5.222 4.652 4.143 3.691 3.287 2.928 2.608 2.323 2.069 1.843 1.642 1.462 1.303 1.160 1.033 0.920 0.820 0.730 0.650 0.579 0.516 0.460
10.104 53.327 116.973 88.083 69.884 55.445 43.989 34.901 29.965 25.681 22.009 18.862 16.165 13.854 11.873 10.175 9.141 8.142 7.252 6.460 5.754 5.125 4.565 4.066 3.622 3.226 2.873 2.559 2.280 2.031 1.809 1.611 1.435 1.278 1.139 1.014 0.903 0.805 0.717 0.638 0.569 0.506 0.451
Base Flow
Q
m3/det 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601
m3/det 11.601 105.901 533.826 1249.888 1221.896 1160.378 1078.080 982.063 850.815 693.937 576.273 483.353 409.245 349.652 301.371 259.940 224.432 197.925 175.179 155.814 139.235 124.976 112.665 101.621 91.784 83.021 75.217 68.265 62.073 56.558 51.645 47.269 43.371 39.900 36.807 34.053 31.599 29.414 27.468 25.734 24.189 22.814 21.589 20.497 19.525 18.659 17.888 17.201 16.589
Tabel 7.10. Perhitungan Hidrograf Debit Banjir Rancangan Dengan Kala Ulang 200 Tahun (Metode Nakayasu) T
U(t,1)
Hujan Jam - Jaman (mm) R1
m3/det/mm 86.245 0.00 0.000 1.00 1.113 96.018 2.00 5.876 506.786 3.00 12.889 1111.626 4.00 9.706 837.081 5.00 7.701 664.129 6.00 6.110 526.912 7.00 4.847 418.045 8.00 3.846 331.671 9.00 3.302 284.766 10.00 2.830 244.050 11.00 2.425 209.155 12.00 2.078 179.250 13.00 1.781 153.620 14.00 1.527 131.655 15.00 1.308 112.831 16.00 1.121 96.698 17.00 1.007 86.867 18.00 0.897 77.375 19.00 0.799 68.919 20.00 0.712 61.388 21.00 0.634 54.680 22.00 0.565 48.705 23.00 0.503 43.382 24.00 0.448 38.642 25.00 0.399 34.419 26.00 0.355 30.658 27.00 0.317 27.308 28.00 0.282 24.323 29.00 0.251 21.665 30.00 0.224 19.298 31.00 0.199 17.189 32.00 0.178 15.311 33.00 0.158 13.638 34.00 0.141 12.147 35.00 0.125 10.820 36.00 0.112 9.638 37.00 0.100 8.584 38.00 0.089 7.646 39.00 0.079 6.811 40.00 0.070 6.066 41.00 0.063 5.404 42.00 0.056 4.813 43.00 0.050 4.287 44.00 0.044 3.819 45.00 0.039 3.401 46.00 0.035 3.030 47.00 0.031 2.699 48.00 0.028 2.404 Sumber : Hasil Perhitungan
R2
R3
R4
R5
R6
22.417
15.725
12.519
10.571
9.241
24.957 131.724 288.935 217.575 172.621 136.955 108.659 86.208 74.017 63.434 54.364 46.591 39.929 34.220 29.327 25.134 22.579 20.111 17.914 15.956 14.212 12.659 11.276 10.044 8.946 7.969 7.098 6.322 5.631 5.016 4.468 3.980 3.545 3.157 2.812 2.505 2.231 1.987 1.770 1.577 1.404 1.251 1.114 0.993 0.884 0.787 0.701
17.507 92.402 202.681 152.624 121.090 96.071 76.221 60.473 51.921 44.497 38.135 32.682 28.009 24.005 20.572 17.631 15.838 14.108 12.566 11.193 9.970 8.880 7.910 7.045 6.276 5.590 4.979 4.435 3.950 3.519 3.134 2.792 2.487 2.215 1.973 1.757 1.565 1.394 1.242 1.106 0.985 0.878 0.782 0.696 0.620 0.552
13.937 73.561 161.354 121.504 96.399 76.482 60.680 48.143 41.334 35.424 30.359 26.018 22.298 19.110 16.378 14.036 12.609 11.231 10.004 8.911 7.937 7.070 6.297 5.609 4.996 4.450 3.964 3.531 3.145 2.801 2.495 2.222 1.980 1.763 1.571 1.399 1.246 1.110 0.989 0.881 0.784 0.699 0.622 0.554 0.494
11.769 62.119 136.257 102.605 81.406 64.586 51.242 40.655 34.905 29.914 25.637 21.972 18.830 16.138 13.830 11.853 10.648 9.484 8.448 7.525 6.702 5.970 5.318 4.736 4.219 3.758 3.347 2.981 2.656 2.365 2.107 1.877 1.672 1.489 1.326 1.181 1.052 0.937 0.835 0.744 0.662 0.590 0.525 0.468
10.288 54.299 119.105 89.689 71.158 56.456 44.791 35.537 30.511 26.149 22.410 19.206 16.460 14.106 12.089 10.361 9.307 8.290 7.384 6.577 5.859 5.218 4.648 4.140 3.688 3.285 2.926 2.606 2.321 2.068 1.842 1.640 1.461 1.302 1.159 1.033 0.920 0.819 0.730 0.650 0.579 0.516 0.459
Base Flow
Q
m3/det 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601
m3/det 11.601 107.620 543.345 1272.459 1243.957 1181.317 1097.519 999.752 866.112 706.374 586.565 491.952 416.492 355.814 306.653 264.466 228.311 201.321 178.161 158.443 141.562 127.043 114.507 103.261 93.245 84.323 76.376 69.298 62.993 57.377 52.375 47.919 43.951 40.416 37.267 34.462 31.964 29.739 27.757 25.991 24.419 23.018 21.771 20.659 19.670 18.788 18.003 17.303 16.680
Tabel 7.11. Perhitungan Hidrograf Debit Banjir Rancangan Dengan Kala Ulang 1000 Tahun (Metode Nakayasu) T
U(t,1) m3/det/mm
Hujan Jam - Jaman (mm) R1
R2
R3
R4
R5
R6
88.989
23.130
16.225
12.917
10.908
9.535
0.00 0.000 1.00 1.113 99.074 2.00 5.876 522.915 3.00 12.889 1147.003 4.00 9.706 863.721 5.00 7.701 685.265 6.00 6.110 543.680 7.00 4.847 431.349 8.00 3.846 342.227 9.00 3.302 293.829 10.00 2.830 251.817 11.00 2.425 215.811 12.00 2.078 184.954 13.00 1.781 158.509 14.00 1.527 135.845 15.00 1.308 116.422 16.00 1.121 99.776 17.00 1.007 89.632 18.00 0.897 79.837 19.00 0.799 71.113 20.00 0.712 63.342 21.00 0.634 56.420 22.00 0.565 50.255 23.00 0.503 44.763 24.00 0.448 39.871 25.00 0.399 35.514 26.00 0.355 31.633 27.00 0.317 28.177 28.00 0.282 25.098 29.00 0.251 22.355 30.00 0.224 19.912 31.00 0.199 17.736 32.00 0.178 15.798 33.00 0.158 14.072 34.00 0.141 12.534 35.00 0.125 11.164 36.00 0.112 9.944 37.00 0.100 8.858 38.00 0.089 7.890 39.00 0.079 7.027 40.00 0.070 6.260 41.00 0.063 5.575 42.00 0.056 4.966 43.00 0.050 4.424 44.00 0.044 3.940 45.00 0.039 3.510 46.00 0.035 3.126 47.00 0.031 2.784 48.00 0.028 2.480 Sumber : Hasil Perhitungan
25.751 135.917 298.130 224.499 178.115 141.314 112.117 88.952 76.372 65.452 56.094 48.074 41.200 35.309 30.261 25.934 23.297 20.751 18.484 16.464 14.665 13.062 11.635 10.363 9.231 8.222 7.324 6.523 5.811 5.176 4.610 4.106 3.658 3.258 2.902 2.585 2.302 2.051 1.827 1.627 1.449 1.291 1.150 1.024 0.912 0.813 0.724
18.064 95.342 209.131 157.481 124.943 99.128 78.647 62.398 53.573 45.913 39.349 33.722 28.901 24.768 21.227 18.192 16.342 14.557 12.966 11.549 10.287 9.163 8.162 7.270 6.475 5.768 5.137 4.576 4.076 3.631 3.234 2.880 2.566 2.285 2.036 1.813 1.615 1.439 1.281 1.141 1.017 0.905 0.807 0.718 0.640 0.570
14.381 75.902 166.489 125.370 99.467 78.916 62.611 49.675 42.650 36.552 31.325 26.846 23.008 19.718 16.899 14.483 13.010 11.588 10.322 9.194 8.189 7.295 6.497 5.787 5.155 4.592 4.090 3.643 3.245 2.890 2.574 2.293 2.043 1.819 1.621 1.443 1.286 1.145 1.020 0.909 0.809 0.721 0.642 0.572 0.509
12.144 64.096 140.594 105.871 83.996 66.642 52.873 41.948 36.016 30.866 26.453 22.671 19.429 16.651 14.270 12.230 10.987 9.786 8.717 7.764 6.916 6.160 5.487 4.887 4.353 3.877 3.454 3.076 2.740 2.441 2.174 1.936 1.725 1.536 1.368 1.219 1.086 0.967 0.861 0.767 0.683 0.609 0.542 0.483
10.615 56.028 122.895 92.543 73.422 58.252 46.217 36.668 31.482 26.981 23.123 19.817 16.983 14.555 12.474 10.690 9.604 8.554 7.619 6.787 6.045 5.385 4.796 4.272 3.805 3.389 3.019 2.689 2.395 2.133 1.900 1.693 1.508 1.343 1.196 1.065 0.949 0.845 0.753 0.671 0.597 0.532 0.474
Base Flow
Q
m3/det 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601
m3/det 11.601 110.675 560.267 1312.585 1283.176 1218.543 1132.078 1031.199 893.306 728.485 604.863 507.238 429.378 366.768 316.043 272.513 235.208 207.358 183.461 163.116 145.698 130.717 117.782 106.178 95.843 86.638 78.438 71.134 64.629 58.834 53.672 49.075 44.980 41.333 38.084 35.190 32.612 30.316 28.271 26.449 24.827 23.382 22.094 20.948 19.926 19.017 18.206 17.485 16.842
PERHITUNGAN HIDROGRAF DEBIT BANJIR RANCANGAN KALA ULANG 1000 TAHUNAN
Tabel 7.11. Perhitungan Hidrograf Debit Banjir Rancangan Dengan Kala Ulang PMP (M T 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 16.00 17.00 18.00 19.00 20.00 21.00 22.00 23.00 24.00 25.00 26.00 27.00 28.00 29.00 30.00 31.00 32.00 33.00 34.00 35.00 36.00 37.00 38.00 39.00 40.00 41.00 42.00
U(t,1)
Hujan Jam - Jaman (mm) R1
R2
R3
R4
m3/det/mm
106.787
27.756
19.470
15.500
0.000 1.113 5.876 12.889 9.706 7.701 6.110 4.847 3.846 3.302 2.830 2.425 2.078 1.781 1.527 1.308 1.121 1.007 0.897 0.799 0.712 0.634 0.565 0.503 0.448 0.399 0.355 0.317 0.282 0.251 0.224 0.199 0.178 0.158 0.141 0.125 0.112 0.100 0.089 0.079 0.070 0.063 0.056
118.889 627.498 1376.404 1036.465 822.318 652.416 517.619 410.672 352.595 302.180 258.974 221.945 190.211 163.014 139.706 119.731 107.558 95.805 85.335 76.010 67.704 60.305 53.715 47.846 42.617 37.960 33.812 30.117 26.826 23.894 21.283 18.958 16.886 15.041 13.397 11.933 10.629 9.468 8.433 7.511 6.691 5.959
30.902 163.100 357.756 269.399 213.738 169.577 134.540 106.742 91.647 78.543 67.313 57.688 49.440 42.371 36.313 31.121 27.957 24.902 22.180 19.757 17.598 15.675 13.962 12.436 11.077 9.867 8.788 7.828 6.973 6.211 5.532 4.927 4.389 3.909 3.482 3.102 2.763 2.461 2.192 1.952 1.739
21.677 114.411 250.958 188.977 149.932 118.954 94.377 74.877 64.288 55.096 47.218 40.467 34.681 29.722 25.472 21.830 19.611 17.468 15.559 13.859 12.344 10.995 9.794 8.724 7.770 6.921 6.165 5.491 4.891 4.357 3.881 3.457 3.079 2.742 2.443 2.176 1.938 1.726 1.538 1.370
17.257 91.082 199.787 150.444 119.361 94.699 75.133 59.610 51.180 43.862 37.590 32.216 27.609 23.662 20.279 17.379 15.612 13.906 12.387 11.033 9.827 8.753 7.797 6.945 6.186 5.510 4.908 4.372 3.894 3.468 3.089 2.752 2.451 2.183 1.945 1.732 1.543 1.374 1.224
43.00 44.00 45.00 46.00 47.00 48.00
0.050 0.044 0.039 0.035 0.031 0.028
Sumber : Hasil Perhitungan
5.308 4.728 4.211 3.751 3.341 2.976
1.549 1.380 1.229 1.095 0.975 0.868
1.220 1.087 0.968 0.862 0.768 0.684
1.090 0.971 0.865 0.770 0.686 0.611
EBIT BANJIR RANCANGAN 00 TAHUNAN
ngan Dengan Kala Ulang PMP (Metode Nakayasu)
man (mm)
Base Flow
Q
11.442
m3/det
m3/det
12.738 67.233 147.474 111.052 88.107 69.903 55.460 44.001 37.779 32.377 27.748 23.780 20.380 17.466 14.969 12.829 11.524 10.265 9.143 8.144 7.254 6.461 5.755 5.126 4.566 4.067 3.623 3.227 2.874 2.560 2.280 2.031 1.809 1.612 1.435 1.279 1.139
11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601 11.601
11.601 130.490 670.001 1572.782 1537.491 1459.931 1356.173 1235.119 1069.647 871.861 723.515 606.366 512.933 437.801 376.931 324.696 279.929 246.510 217.833 193.419 172.517 154.540 139.018 125.094 112.692 101.645 91.805 83.041 75.234 68.280 62.087 56.570 51.656 47.279 43.380 39.907 36.814 34.059 31.605 29.419 27.472 25.738 24.193
R5
R6
13.089
14.573 76.915 168.713 127.045 100.796 79.970 63.447 50.338 43.219 37.040 31.744 27.205 23.315 19.981 17.124 14.676 13.184 11.743 10.460 9.317 8.299 7.392 6.584 5.865 5.224 4.653 4.144 3.692 3.288 2.929 2.609 2.324 2.070 1.844 1.642 1.463 1.303 1.160
1.034 0.921 0.820 0.730 0.651 0.580
1.014 0.904 0.805 0.717 0.639 0.569
11.601 11.601 11.601 11.601 11.601 11.601
22.817 21.591 20.500 19.527 18.661 17.890
Tabel 7.12 Rekapitulasi Perhitungan Hidrograf Debit Banjir Rancangan Dengan Menggunakan Metode Nakayasu Waktu (jam)
Debit Banjir Rancangan (m3/dt) 2 th
5 th
10 th
25 th
50 th
100 th
200 th
1000 th
0.00
11.601
11.601
11.601
11.601
11.601
11.601
11.601
11.601
1.00
80.595
92.535
97.050
101.339
103.841
105.901
107.620
110.675
2.00
393.682
459.808
484.810
508.563
522.422
533.826
543.345
560.267
3.00
917.582
1074.379
1133.663
1189.985
1222.847
1249.888
1272.459
1312.585
4.00
897.102
1050.354
1108.298
1163.347
1195.466
1221.896
1243.957
1283.176
5.00
852.093
997.556
1052.554
1104.805
1135.292
1160.378
1181.317
1218.543
6.00
791.881
926.922
977.981
1026.488
1054.791
1078.080
1097.519
1132.078
7.00
721.631
844.514
890.976
935.116
960.871
982.063
999.752
1031.199
8.00
625.604
731.869
772.047
810.217
832.489
850.815
866.112
893.306
9.00
510.826
597.226
629.893
660.928
679.036
693.937
706.374
728.485
10.00
424.738
496.239
523.273
548.956
563.942
576.273
586.565
604.863
11.00
356.754
416.489
439.074
460.531
473.051
483.353
491.952
507.238
12.00
302.533
352.884
371.922
390.008
400.561
409.245
416.492
429.378
13.00
258.933
301.738
317.923
333.298
342.270
349.652
355.814
366.768
14.00
223.609
260.301
274.174
287.353
295.044
301.371
306.653
316.043
15.00
193.296
224.741
236.631
247.926
254.517
259.940
264.466
272.513
16.00
167.317
194.266
204.456
214.136
219.784
224.432
228.311
235.208
17.00
147.923
171.516
180.436
188.911
193.856
197.925
201.321
207.358
18.00
131.281
151.994
159.826
167.266
171.607
175.179
178.161
183.461
19.00
117.114
135.374
142.279
148.838
152.665
155.814
158.443
163.116
20.00
104.984
121.145
127.256
133.061
136.448
139.235
141.562
145.698
21.00
94.551
108.907
114.335
119.492
122.501
124.976
127.043
130.717
22.00
85.543
98.340
103.179
107.775
110.458
112.665
114.507
117.782
23.00
77.463
88.862
93.171
97.266
99.655
101.621
103.261
106.178
24.00
70.266
80.419
84.258
87.905
90.033
91.784
93.245
95.843
25.00
63.855
72.899
76.318
79.566
81.462
83.021
84.323
86.638
26.00
58.145
66.200
69.246
72.139
73.828
75.217
76.376
78.438
27.00
53.059
60.234
62.947
65.524
67.028
68.265
69.298
71.134
28.00
48.529
54.919
57.336
59.631
60.971
62.073
62.993
64.629
29.00
44.493
50.186
52.338
54.383
55.576
56.558
57.377
58.834
30.00
40.899
45.969
47.887
49.708
50.771
51.645
52.375
53.672
31.00
37.697
42.214
43.921
45.544
46.490
47.269
47.919
49.075
32.00
34.846
38.869
40.390
41.835
42.678
43.371
43.951
44.980
33.00
32.306
35.889
37.244
38.531
39.282
39.900
40.416
41.333
34.00
30.043
33.235
34.442
35.588
36.257
36.807
37.267
38.084
35.00
28.028
30.871
31.946
32.967
33.563
34.053
34.462
35.190
36.00
26.233
28.765
29.722
30.632
31.163
31.599
31.964
32.612
37.00
24.634
26.889
27.742
28.552
29.025
29.414
29.739
30.316
38.00
23.210
25.219
25.978
26.700
27.121
27.468
27.757
28.271
39.00
21.941
23.731
24.407
25.050
25.425
25.734
25.991
26.449
40.00
20.811
22.405
23.008
23.581
23.915
24.189
24.419
24.827
41.00
19.805
21.225
21.761
22.271
22.569
22.814
23.018
23.382
42.00
18.908
20.173
20.651
21.105
21.371
21.589
21.771
22.094
43.00
18.110
19.236
19.662
20.067
20.303
20.497
20.659
20.948
44.00
17.399
18.402
18.781
19.142
19.352
19.525
19.670
19.926
45.00
16.765
17.659
17.997
18.318
18.505
18.659
18.788
19.017
46.00
16.201
16.997
17.298
17.584
17.751
17.888
18.003
18.206
47.00
15.698
16.407
16.675
16.930
17.079
17.201
17.303
17.485
48.00
15.251
15.882
16.121
16.348
16.480
16.589
16.680
16.842
Q maksimum
917.582
1074.379
1133.663
1189.985
1222.847
1249.888
1272.459
1312.585
Sumber : Hasil Perhitungan
Hidrograf Debit Banjir Rancangan Metode Nakayasu
1800
1600
1400
Q ( m3/dt )
Q 2 th Q 5 th
1200
Q 10 th Q 25 th Q 50 th
1000
Q 100 th Q 200 th
800
Q 1000 th Q PMP
600
400
200
0
0
2
4
6
8
10
12
14
16
18
20
22
24
T (jam)
26
28
30
32
34
36
38
40
42
44
4
1000
Q 100 th Q 200 th
800
Q 1000 th Q PMP
600
400
200
0
0
2
4
6
8
10
12
14
16
18
20
22
24
T (jam)
26
28
30
32
34
36
38
40
42
44
4
Hidrograf Debit Banjir Rancangan Metode Nakayasu
Q 2 th Q 5 th Q 10 th Q 25 th Q 50 th Q 100 th Q 200 th Q 1000 th Q PMP
14
16
18
20
22
24
T (jam)
26
28
30
32
34
36
38
40
42
44
46
48
Q 100 th Q 200 th Q 1000 th Q PMP
14
16
18
20
22
24
T (jam)
26
28
30
32
34
36
38
40
42
44
46
48
