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All Journal Ocean Engineering: Jurnal Ilmu Teknik dan Teknologi Maritim Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipil
Cahyono Ikhsan
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Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Electrical & Electronics Engineering Engineering Mechanical Engineering

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Evaluasi Ketinggian Bendungan Plumbon Kabupaten Wonogiri terhadap Debit Desain Tahun 2024 Aditya Eka Setiawan; Agus Hari Wahyudi; Cahyono Ikhsan
Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipil Vol. 2 No. 4 (2024): Oktober: Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik S
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/konstruksi.v2i4.555

Abstract

Indonesia has many dams that have been established since the Dutch Colonial era, including the Plumbon Dam located in Wonogiri Regency. During this time, many changes have occurred, including changes in flood discharge. The impact of climate change and land use change around the watershed has led to an increase in the frequency of extreme rainfall, which contributes to an increase in flood discharge. This study aims to evaluate the height of Plumbon Dam, assessing its safety against the new planned flood discharge. A 1000-year return period discharge and PMF analysis of Plumbon Dam was conducted for the year 2024. The calculation of rainfall R1000 and PMP using the Isohyet method, with the calculation of synthetic unit hygrograph using the HSS Nakayasu method. The calculation results obtained flood discharge Q1000 value of 73,33 m3/s and QPMF obtained at 107,75 m3/s. The required dam crest elevation was obtained, for Q1000 discharge + 227,43 m and QPMF + 226,96 m. The results of calculations using the 2024 design flood discharge are stated to experience overtopping of the 1000-year return period discharge because the flood water level exceeds the existing dam crest height of + 227 m and is safe against QPMF discharge.
Evaluasi Efektivitas Kinerja Instalasi Pengolahan Air Limbah (IPAL) di Kota Surakarta Rizky Nugraha Ramadhan; Budi Utomo; Solichin Solichin; Cahyono Ikhsan; Koosdaryani Soeryodarundio
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 3 No. 3 (2024): September: Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v3i3.2421

Abstract

Household sewage treatment in Surakarta City depends on the performance of the available domestic wastewater treatment plants (IPAL), including Pucangsawit IPAL, Semanggi IPAL, Mojosongo IPAL, and UNS IPAL. Each of these IPAL’s serves a specific area, such as the UNS IPAL which serves the UNS area and its surroundings, the Mojosongo IPAL which is in charge of the North Area of Surakarta, the Semanggi IPAL which takes care of the South Area of Surakarta, and the Pucangsawit IPAL which serves the Central Area of Surakarta City. This research aimed at the effectiveness of the performance and development plan of each IPAL in the next 20 years. This research used descriptive qualitative and quantitative analysis methods. Qualitative descriptive analysis was conducted by observing the existing condition of IPAL Komunal in the research location. Quantitative descriptive analysis in this study was carried out by testing samples at the inlet, aeration, and outlet points of the IPAL. Based on the quality standards of the Minister of Environment and Forestry Regulation number P 68 of 2016, each IPAL. UNS IPAL is 47.27% for BOD, 73.81% for COD, 76.36% for TSS. Mojosongo IPAL is 88.71% for BOD, 76.50% for COD, 78.57% for TSS. Pucangsawit IPAL was 91.88% for BOD, 83.20% for COD, 74.82% for TSS. Semanggi IPAL is 20.45% for BOD, 69.95% for COD, 69.05% for TSS. Alternative development at the IPAL that can be done to prepare for the next 20 years is to increase the volume in the initial settling basin, aerobic biofilter basin, and also the final settling basin.
Co-Authors Aditya Eka Setiawan Agus Hari Wahyudi Aminuyati BUDI UTOMO Fakhrizal Arifandi Fariza Rubawi Achmad Koosdaryani Koosdaryani Koosdaryani Soeryodarundio Lanaria Pangestu Pury Mregawati Rizky Nugraha Ramadhan Setiono Setiono Solichin Solichin Wildan Yoga Pratama