1. DAFTAR ISI
KATA PENGANTAR ...................................................................................i
LEMBAR PENGESAHAN ...........................................................................iii
DAFTAR ISI...................................................................................................iv
DAFTAR TABEL ..........................................................................................ix
DAFTAR GAMBAR .....................................................................................xii
BAB I PENDAHULUAN......................................................................1
1.1 Latar Belakang ................................................................1
1.2 Maksud dan Tujuan Penulisan ........................................3
1.3 Batasan Masalah .............................................................4
1.4 Teknik Pengumpulan Data .............................................5
1.5 Sistematika Penulisan......................................................6
BAB II TINJAUAN PUSTAKA ............................................................8
2.1 Pengertian Bendung ........................................................8
2.2 Pemilihan Lokasi Bendung .............................................13
2.3 Analisa Curah Hujan .......................................................15
2.3.1 Analisa Curah Hujan Rata-rata.............................15
2.4 Analisa Curah Hujan Rencana ........................................17
2.4.1 Distribusi Normal ................................................18
2.4.2 Distribusi Log Normal..........................................19
2.4.3 Distribusi Gumbel ................................................20
2.4.4 Distribusi Hasper .................................................23
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2. 2.4.5 Distribusi Weduwen ............................................25
2.5 Analisa Debit Rencana ...................................................26
2.5.1 Metode Hasper .....................................................26
2.5.2 Metode Weduwen ................................................28
2.5.3 Metode Rasional ..................................................29
2.6 Perencanaan Teknis Bendung .........................................31
2.6.1 Penentuan Elevasi Mercu Bendung .....................32
2.6.2 Penentuan Lebar Bendung ...................................33
2.6.3 Tipe Mercu Bendung ...........................................34
2.6.4 Perhitungan Hidrolis Bendung ............................40
2.6.5 Peredam Energi ....................................................47
2.6.6 Perencanaan Lantai di Hulu Bendung .................51
2.6.7 Bangunan Pelengkap ...........................................53
2.7 Stabilitas Bendung ..........................................................54
2.7.1 Gaya Akibat Sendiri ............................................54
2.7.2 Gaya Akibat Gempa ............................................55
2.7.3 Gaya Hidrostatis ..................................................56
2.7.4 Gaya Akibat Tekanan Lumpur ............................57
2.7.5 Gaya Akibat Tekanan Tanah ...............................58
2.7.6 Gaya Angkat (Uplift Pressure) ............................59
2.8 Kontrol Stabilitas ............................................................60
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3. BAB III METODOLOGI PENULISAN.................................................64
3.1 Gambaran Umum ...........................................................64
3.2 Lokasi Perencanaan ........................................................65
3.3 Kondisi Topografi ..........................................................67
3.4 Geologi dan Tanah .........................................................67
3.5 Hidrologi .........................................................................68
3.6 Kondisi Masyarakat Setempat .........................................69
3.7 Perencanaan Teknis Bendung ..........................................70
3.8 Standar Perencanaan ........................................................71
BAB IV PEMBAHASAN DAN PERENCANAAN ...............................72
4.1 Data Curah Hujan Harian Maksimum ............................72
4.2 Analisa Curah Hujan.......................................................72
4.2.1 Analisa Curah Hujan Maksimum Rata-rata .........72
4.3 Analisa Curah Hujan Rencana.........................................74
4.3.1 Distribusi Normal ................................................75
4.3.2 Distribusi Log Normal .........................................76
4.3.3 Distribusi Gumbel ................................................77
4.3.4 Distribusi Hasper .................................................79
4.3.5 Distribusi Weduwen ............................................82
4.4 Analisa Debit Banjir Rencana ........................................85
4.4.1 Metode Rasional ..................................................85
4.4.2 Metode Hasper .....................................................88
4.4.3 Metode Weduwen ................................................90
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4. 4.5 Perhitungan dan Perencanaan Hidrolis Bendung ..........92
4.5.1 Pemilihan Tipe Bendung .....................................94
4.5.2 Penentuan Elevasi Mercu Bendung .....................95
4.5.3 Penentuan Lebar Bendung ...................................96
4.5.4 Tinggi Muka Air di Atas Mercu Bendung ...........97
4.5.5 Tinggi Air di Hilir Bendung ................................100
4.5.6 Air Balik (Back Water) ........................................102
4.5.7 Perencanaan Lantai Olak (Peredam Energi) ........102
4.5.8 Bangunan Pelengkap ...........................................105
4.5.8.1 Pengambilan (Intake) .............................105
4.5.8.2 Bangunan Pembilasan ............................107
4.6 Perhitungan Panjang Lantai hulu .....................................110
4.7 Gaya-Gaya yang Bekerja Pada Bendung ........................115
4.7.1 Gaya Akibat Sendiri ............................................115
4.7.2 Gaya Akibat Gempa ............................................117
4.7.3 Gaya Hidrostatis ..................................................120
4.7.4 Gaya Akabat Tekanan Lumpur ............................123
4.7.5 Gaya Angkat (Uplift Pressure) ............................125
4.7.6 Gaya Akibat Tekanan Tanah ...............................128
4.8 Kontrol Stabilitas Bendung ............................................130
4.8.1 Kondisi Air Normal .............................................130
4.8.2 Kondisi Air banjir ................................................134
4.8.3 Kondisi Air Kering ..............................................138
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