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All Journal Journal of Engineering and Technological Sciences Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) Borneo Engineering : Jurnal Teknik Sipil
Mahlil, Teuku
Universitas Pertamina, Department Of Environmental Engineering, Jalan Teuku Nyak Arief, Simprug, Jakarta Selatan, Jakarta 12220,
Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Engineering

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Effect of Nutrient Inputs on Water Quality Change and Phytoplankton Growth in Atsumi Bay Mahlil, Teuku; Inoue, Takanobu; Matsumoto, Yoshitaka; Aoki, Shinichi; Kato, Shigeru; Yokota, Kuriko; Rasul, Ernawaty; Saga, Makoto
Journal of Engineering and Technological Sciences Vol 50, No 4 (2018)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1028.082 KB) | DOI: 10.5614/j.eng.technol.sci.2018.50.4.7

Abstract

Eutrophication in an estuary occurs as an effect of the enrichment of nutrient inputs from rivers. This condition has become one of the most common environmental issues experienced around the globe and especially in Japan. Atsumi Bay is a eutrophic coastal area in Japan. The objective of this research was to analyze the influences of nutrient inputs from the Umeda River into Atsumi Bay on pre- and post-rainfall water quality conditions. This study was conducted from July to October 2010. The results showed a decrease of surface salinity after rainfall indicating that huge freshwater inputs had overlaid the surface layer of Atsumi Bay rather than the bottom layer. Moreover, post-rainfall conditions showed an increase of chlorophyll a as an effect of phytoplankton growth, followed by an increase of particulate nutrients. On the other hand, dissolved nutrients decreased due to uptake by phytoplankton and dilution by freshwater.
Children's Environmental Waste Reduction Education Rawa Simprug IX, South Jakarta, Special Capital Region of Jakarta to Increase Public Awareness of Environmental Issues Wira Aulia; Ari Rahman; Teuku Mahlil; Evi Siti Sofiyah; Ariyanti Sarwono; I Wayan Koko Suryawan
Jurnal Pengabdian kepada Masyarakat (Indonesian Journal of Community Engagement) Vol 7, No 4 (2021): December
Publisher : Direktorat Pengabdian kepada Masyarakat Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (964.325 KB) | DOI: 10.22146/jpkm.64467

Abstract

ABSTRACT Education is something that serves as a foundation for humans. As educational activists, we can raise a better generation by conducting teaching activities for the nation's children to hone their academic and non-academic abilities outside formal schools. The large number of students dropping out of school causes non-formal education to have an important role in fostering environmental awareness. This activity aims to foster a sense of concern for environmental knowledge, especially among children in Rawa Simprug IX, South Jakarta, Special Capital Region of (DKI) Jakarta. In addition, it also aims to enhance children's interest in reading from an early age and their understanding of various lessons that have been or have not been obtained in formal schools. This activity was conducted from August 2019 to November 2019. The peak of the event was held on Sunday, November 24, 2019. In this activity, several books could be loaned to children for on-the-spot reading (in the Madani Rubric). The book was carried by a mobile library car from the South Jakarta Administration City Library and Archives Service. There were approximately 30 children of Rawa Simprug IX who took part as the participants in this event. This activity teaches children in the Rawa Simprug IX area who need additional education with the help of HMTL (Himpunan Mahasiswa Teknik Lingkungan) and some lecturers from Pertamina University as the teaching staff. The children were also taught about the environment, particularly reducing plastic waste by using drinking bottles. The achievement of this activity is a recycling product made by the target community themselves.
Analisis Probabilistik Bencana Tsunami terhadap Tingkat Kerentanan Bangunan di Kota Painan, Sumatera Barat berdasarkan Rasio Gempa dengan Metode Logic Tree Putra, Gusti Mahendra; Mahlil, Teuku; Januriyadi, Nurul Fajar; Rasyif, Teuku Muhammad
Borneo Engineering : Jurnal Teknik Sipil Volume 8 Nomor 3 Tahun 2024
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v8i3.5884

Abstract

Sumatera Barat khususnya segmen Mentawai Megathrust merupakan suatu segmen yang rentan terjadinya tumbukan antara patahan aktif, sehingga memicu terjadinya gempa bumi yang kemudian disusul dengan bencana tsunami. Tujuan dari penelitian ini adalah mengetahui pengaruh perbedaan variabel tingkat keaktifan seismik dan rasio antara gempa besar dan gempa kecil dengan alat bantu Logic Tree, potensi bahasa tsunami dengan Probabilistic Tsunami Hazard Assessment, serta menentukan gedung yang dapat digunakan sebagai tempat evakuasi berdasarkan nilai indeks Building Tsunami Vulnerability yang berlangsung di Kota Painan terhadap zona patahan padang. Simulasi dalam penelitian ini menggunakan program Cornell Multi-grid Coupled Tsunami. Dari simulasi tersebut, dilakukan perhitungan ketinggian tsunami pada setiap bangunan di Kota Painan, dan waktu periode ulang ditentukan menggunakan persamaan PTHA. Selain itu, dilakukan penentuan tingkat kerentanan bangunan dengan menggunakan persamaan BTV. Hasil pengolahan data PTHA menunjukkan bahwa ketinggian tsunami maksimal dalam periode ulang 1000 tahun adalah 5.664 meter, sedangkan pada periode ulang 4000 tahun adalah 36 meter. Berdasarkan nilai Building Tsunami Vulnerability, solusi mitigasi yang direkomendasikan adalah menggunakan bangunan dengan nilai kelas BTV 0 (tidak ada), 1 (rendah), dan 2 (sedang). Seperti bangunan Kantor Cabang Bank Nagari yang merupakan bangunan beton bertulang 4 lantai, dikhususkan untuk masyarakat yang tinggal di sekitar garis pantai atau yang jauh dari perbukitan. Selain itu, masyarakat yang tinggal dapat memanfaatkan dataran tinggi atau perbukitan sebagai tempat evakuasi.
Co-Authors Aoki, Shinichi Ari Rahman Ariyanti Sarwono Evi Siti Sofiyah Inoue, Takanobu Januriyadi, Nurul Fajar Kato, Shigeru Matsumoto, Yoshitaka Putra, Gusti Mahendra Rasul, Ernawaty Rasyif, Teuku Muhammad Saga, Makoto Suryawan, I Wayan Koko Ujang Sumarwan Wira Aulia Yokota, Kuriko