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Hari Nugroho
Departemen Teknik Sipil, Universitas Diponegoro
Engineering

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Metode Pemasangan Instrumen Keamanan Bendungan Lausimeme Henu Satya Aliputa; Sukamta Sukamta; Hari Nugroho
TEKNIK Vol 45, No 1 (2024)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v45i1.59938

Abstract

Penelitian ini bertujuan untuk membuat metode pemasangan instrumen keamanan Bendungan Lausimeme sesuai gambar kerja (shopdrawing) dan keadaan di lapangan. Hasil penelitian menunjukkan terdapat 16 Piezometer Vibrating Wire (PVW), 4 Inklinometer, 4 Multilayer Settlement, dan 8 Open Standpipe Piezometer dipasang dengan pengeboran. Total kedalaman pengeboran untuk pemasangan instrumen adalah 438,92 m. Sebanyak 42 PVW, 9 Crest Settlement Survey Point, dan 21 Surface Settlement Survey Point dipasang bersamaan tubuh bendungan. Sebanyak 1 Seepage Measuring Device, 1 Seismograf dan 1 Observation Well dipasang diluar tubuh bendungan. Tahapan umum pemasangan dengan pengeboran dimulai dengan persiapan instrumen, marking titik pengeboran, pengeboran, pemasangan instrumen, pembacaan instrumen, pengisian lubang bor, dan penempatan pipa/kabel. Pemasangan instrumen bersamaan dengan tubuh bendungan dimulai dengan persiapan instrumen, marking titik, pemasangan instrumen, dan pembacaan instrumen. Instrumen observation well yang dipasang diluar tubuh bendungan memiliki tahap yang sama seperti pisometer pipa terbuka. Seepage measuring device dan seismograf memiliki tahap pekerjaan yang bervariasi. Sumber daya utama yang diperlukan untuk pengeboran adalah tim pengeboran, material pengisi lubang bor, dan 1 set alat bor kering. Sumber daya utama untuk pemasangan bersamaan dengan tubuh bendungan adalah waterpass dan handtamper. Kontraktor harus menyiapkan sumberdaya yang dibutuhkan 1 bulan sebelum pekerjaan dimulai.
Simulation Analysis of Base Year Operation Pattern Method of Marangkayu Reservoir East Kalimantan Province Gonzales Sihite; Hari Nugroho
TEKNIK Vol 46, No 1 (2025)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i1.67652

Abstract

Marangkayu is a multi-purpose dam that serves irrigation water needs for a functional area of 1,500 hectares and provides raw water supplementation of approximately 450 liter per second. One of the requirements for impounding certification involves the preparation of an operational guideline for the dam. Therefore, this study aims to analyze the reservoir operation pattern by simulating water availability and demand. The reservoir operation pattern is determined through simulations based on calculations of water inflow, water demand, and losses, constrained by the reservoir's storage capacity. The simulation calculations employ the baseline year method, which includes dry years, normal years, and wet years. Reservoir water availability simulations are conducted under three conditions: dry year (probability of being equaled or exceeded 65%), normal year (probability of being equaled or exceeded 50%), and wet year (probability of being equaled or exceeded 35%). The results of this study indicate that the simulation of Marangkayu reservoir's operation pattern for dry, normal, and wet conditions can sufficiently meet the water needs for a functional irrigation area of 1,500 hectares with a cropping pattern of rice–rice–secondary crops, raw water demand of 450 liter per second, and river maintenance flow of 0.848 m³/second.
Co-Authors Gonzales Sihite Henu Satya Aliputa Sukamta Sukamta