%0 Thesis
%9 Other
%A Kurniawan 110018068, Wahyu
%B Fakultas Teknik Sipil dan Perencanaan : Teknik sipil
%D 2022
%F ITNYREPOID:4002
%I Institut Teknologi Nasional Yogyakarta
%K sabo dam, Sungai Leprak, analisis hidrologi, stabilitas ;Sabo Dam, Leprak River, Hydrological Analysis, Stability
%T Perencanaan Sabo Dam LE-CD 01 Tipe Terbuka di Sungai Leprak Wilayah Gunungapi Semeru, Jawa Timur
%U https://repository.itny.ac.id/id/eprint/4002/
%X Gunungapi Semeru adalah salah satu gunungapi aktif di Indonesia yang terletak di Kabupaten Lumajang dan Kabupaten Malang, Provinsi Jawa Timur. Aktifitas vulkanik ini menimbulkan terjadinya banjir lahar dingin (debris) di sekitar Lereng Semeru termasuk Sungai Leprak. Tujuan dari tugas akhir ini yakni merencanakan sabo dam tipe terbuka (jenis slit) yang mampu menahan sedimen hasil banjir debris pada Sungai Leprak.  Perencanaan sabo dam dimulai dengan penentuan lokasi kedudukan sabo dam, dilanjutkan analisis hidrologi. Analisis hidrologi ini menggunakan data hujan tahun 2010-2021 pada Sub DAS Rejali dengan metode rerata dan dilanjutkan analisis frekuensi untuk mendapatkan hujan rencana. Perhitungan debit banjir rencana periode ulang 100 tahunan menggunakan Hidrograf Satuan Sintesis (HSS) Nakayasu. Setelah diperoleh debit banjir rencana kemudian analisis pengaruh sedimen untuk memperoleh debit desain. Perencanaan Sabo Dam LE-CD 01 ini terdiri dari main dam, apron, sub dam, dan dinding tepi serta menghitung kapasitas tampungan sabo dam. Analisis stabilitas sabo dam rencana dilakukan terhadap gaya guling, geser, dan daya dukung tanah fondasi. Tahap terakhir menggambar gambar desain sabo dam.  Berdasarkan analisis hidrologi diperoleh debit banjir desain sebesar 262,041 m3/det. Pada perencanaan ini didapatkan main dam dengan tinggi total 13 m, lebar mercu pelimpah 3 m, kemiringan hulu 0,5 dan hilir 0,2. Apron diperoleh tebal 1,5 m dan panjang 40 m. Sub dam didapatkan tinggi total 8 m dan tinggi dinding tepi sebesar 6 m, sedangkan volume tampungan total sebesar 105.059,947 m3.       Kata Kunci : sabo dam, Sungai Leprak, analisis hidrologi, stabilitas    Semeru Volcano is one of the active volcanoes in Indonesia located in Lumajang Regency and Malang Regency, East Java Province. This volcanic activity has caused cold lava (debris) floods around the Semeru slopes including the Leprak River. The purpose of this final project is to plan an open type sabo dam (slit type) that is able to retain sediment from debris floods in the Leprak River.  Sabo dam planning begins with determining the location of the sabo dam position, followed by hydrological analysis. This hydrological analysis uses rainfall data from 2010-2021 in the Rejali Sub-watershed using the average method and continued with frequency analysis to obtain rainfall plans. The calculation of the 100-year return period plan flood discharge uses the Nakayasu Synthesized Unit Hydrograph (HSS). After obtaining the plan flood discharge then analyze the effect of sediment to obtain the design discharge. This LE-CD 01 Sabo Dam planning consists of main dam, apron, sub dam, and edge wall and calculates the storage capacity of the sabo dam. The stability analysis of the planned sabo dam is carried out on the overturning force, shear, and bearing capacity of the foundation soil. The last stage is drawing the sabo dam design drawings.  Based on hydrological analysis, the design flood discharge is 262,041 m3/det. In this planning, a main dam is obtained with a total height of 13 m, a spillway width of 3 m, an upstream slope of 0.5 and a downstream slope of 0.2. Apron is obtained 1.5 m thick and 40 m long. The sub dam is obtained with a total height of 8 m and an edge wall height of 6 m, while the total storage volume is 105.059,947 m3.      Keywords: Sabo Dam, Leprak River, Hydrological Analysis, Stability