Title Laporan dan Lampiran Tugas Besar_Kelompok 7_Perancangan Bangunan Sungai.pdf ✅

KATA PENGANTAR Penulis memanjatkan syukur ke hadirat Tuhan Yang Maha Esa atas berkat dan karunia-Nya, Tugas Besar Perancangan Bangunan Sungai untuk memenuhi syarat kelulusan mata kuliah tersebut dapat selesai dengan baik dan tepat waktu. Proses pengerjaan tugas besar itu tentu mengalami banyak kendala dan tidak dapat diselesaikan tanpa bantuan dan dukungan dari berbagai pihak. Oleh karena itu, kami sampaikan ucapan terima kasih kepada : 1. Bapak Dr.techn. Umboro Lasminto, S.T., M.Sc. selaku dosen pengajar mata kuliah yang juga sekaligus sebagai dosen pembimbing asistensi yang telah memberikan arahan serta bimbingan dalam menyelesaikan Laporan Tugas Besar Perancangan Bangunan Sungai. 2. Teman-teman Departemen teknik Sipil ITS sebagai tempat berdiskusi bersama dalam menyelesaikan laporan ini. Dalam penyusunan laporan ini, penulis menyadari masih jauh dari sempurna. Oleh karena itu, penulis tidak menutup diri akan saran dan kritik yang sifatnya membangun demi perbaikan penyusunan laporan tugas besar di masa yang akan datang. Penulis berharap laporan ini dapat bermanfaat bagi penulis sebagai penyusun laporan dan juga pembaca. Surabaya, 31 Mei 2024 Penulis 2
DAFTAR ISI KATA PENGANTAR...................................................................................................... 2 DAFTAR ISI.....................................................................................................................3 DAFTAR TABEL.............................................................................................................5 DAFTAR GAMBAR........................................................................................................6 BAB I................................................................................................................................ 7 PENDAHULUAN............................................................................................................ 7 1.1 Latar Belakang.......................................................................................................7 1.2 Rumusan Masalah.................................................................................................7 1.3 Tujuan.................................................................................................................... 7 1.4 Manfaat..................................................................................................................8 BAB II...............................................................................................................................9 TINJAUAN PUSTAKA...................................................................................................9 2.1 Daerah Aliran Sungai (DAS).................................................................................9 2.2 Analisis Hujan Rencana........................................................................................9 2.2.1 Metode Gumbel.......................................................................................... 10 2.2.2 Metode Log Pearson Tipe III......................................................................12 2.2.3 Metode Normal...........................................................................................13 2.3 Analisis Debit Banjir Rencana............................................................................ 14 2.3.1 Metode Rasional......................................................................................... 14 2.3.1 Metode HSS Nakayasu...............................................................................16 2.4 Analisis Muka Air Banjir.................................................................................... 18 2.5 Bangunan Penahan Sedimen............................................................................... 19 BAB III........................................................................................................................... 24 DAERAH ALIRAN SUNGAI.......................................................................................24 3.1 Data Sungai..........................................................................................................24 3.2 Daerah Aliran Sungai......................................................................................... 24 BAB IV............................................................................................................................28 ANALISIS TINGGI HUJAN RENCANA...................................................................28 4.1 Data Hujan...........................................................................................................28 4.1.1 Metode Polygon Thiessen.......................................................................... 28 4.1.2 Metode Aritmatika......................................................................................30 4.2 Perhitungan Tinggi Hujan Rencana....................................................................31 4.2.1 Metode Gumbel.......................................................................................... 31 4.2.2 Metode Log Pearson Tipe III......................................................................33 4.2.3 Metode Normal...........................................................................................34 BAB V............................................................................................................................. 36 ANALISIS DEBIT BANJIR RENCANA....................................................................36 5.1 Data Sungai..........................................................................................................36 3
5.2 Perhitungan Debit Banjir Rencana..................................................................... 36 5.2.1 Metode Rasional......................................................................................... 36 5.2.1 Metode HSS Nakayasu...............................................................................37 BAB VI............................................................................................................................48 ANALISIS MUKA AIR BANJIR................................................................................ 48 6.1 Rating Curve........................................................................................................48 6.2 Penentuan Muka Air Banjir................................................................................49 BAB VII..........................................................................................................................50 DESAIN BANGUNAN PENAHAN SEDIMEN..........................................................50 7.1 Tinggi Bendung Utama........................................................................................50 7.2 Desain Tubuh Bendung Utama............................................................................51 7.2.1 Dimensi Pelimpah.......................................................................................51 7.2.2 Tinggi Jagaan Pelimpah..............................................................................52 7.2.3 Lebar Mercu Pelimpah............................................................................... 53 7.2.4 Kecepatan Air di atas Pelimpah..................................................................53 7.2.5 Kedalaman Pondasi Bendung Utama......................................................... 54 7.2.6 Kemiringan Badan Bendung Utama...........................................................54 7.3 Dimensi Kolam Olak........................................................................................... 56 7.4 Dimensi Tubuh Sub Bendung..............................................................................58 7.5 Stabilitas Bendung dalam Keadaan Normal dan Banjir...................................... 58 7.6 Stabilitas Tembok Tepi........................................................................................ 60 BAB VIII........................................................................................................................ 64 PENUTUP...................................................................................................................... 64 8.1 Kesimpulan..........................................................................................................64 8.2 Saran.................................................................................................................... 66 DAFTAR PUSTAKA..................................................................................................... 67 LAMPIRAN................................................................................................................... 68 4