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Fitriani, Eka Nur
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Penerapan Pengelolaan Drainase Berwawasan Lingkungan (Ecodrain) di Kelurahan Kembangan Utara Fitriani, Eka Nur; Ashadi, Reza Ferial; Kussumardianadewi, Bernadette Detty; Suprapti, Suprapti
Jurnal Pengabdian West Science Vol 3 No 02 (2024): Jurnal Pengabdian West Science
Publisher : Westscience Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58812/jpws.v3i02.1005

Abstract

Kegiatan pengabdian masyarakat ini memfokuskan kepada penerapan pengelolaan drainase secara terpadu berwawasan lingkungan (ecodrain) di Kelurahan Kembangan Utara. Permasalahan yang sering muncul di area perkotaan khususnya daerah yang padat penduduk yaitu genangan air pada saat intensitas hujan tinggi. Hal ini disebabkan karena buruknya sistem drainase yang ada di daerah tersebut. Pradigma lama mengenai penanganan drainase yaitu secepatnya mengalirkan limpasan air hujan ke saluran atau bada air terdekat sedangkan paradigma baru sedapat mungkin menahan dulu, meresapkan ke dalam tanah melalui sumur resapan, waduk, kolam retensi dan sebagainya serta konsep drainase berwawasan lingkungan. Salah satu metode penanganan saluran drainase terpadu berwawasan lingkungan adalah dengan metode ecodrain. Salah satunya yaitu pemanfaatan air hujan dengan pembuatan sumur-sumur resapan penampung air hujan guna mengurangi volume limpasan air hujan yang akan mengalir ke saluran drainase dan sungai. Hasil dari kegiatan ini adalah pembuatan sumur resapan dengan menggunakan modular tank dan non woven geotextile sebagai filtrasi di kantor kelurahan Kembangan Utara. Sumur resapan yang dibuat dapat menampung air sebanyak 0,63 m3 yang diharapkan dapat mengurangi permasalahan banjir yang terjadi di daerah Kelurahan Kembangan Utara.
Evaluation of liquefaction potential in reworked volcanic-colluvial deposits of the Bawen Area, Semarang Regency Vidayanti, Desiana; Ramli Nazir; Ratnaningsih, Ratnaningsih; Komerdevi, Det; Simatupang , Pintor Tua; Fitriani, Eka Nur
Teknisia Vol 30 No 2 (2025): Teknisia
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol30.iss2.art1

Abstract

Liquefaction is a major geotechnical hazard that can severely damage infrastructure in earthquake-prone areas. This study evaluates the liquefaction potential of volcanic–colluvial deposits in Semarang Regency, Central Java, using Standard Penetration Test (SPT) data and the Simplified Procedure of Seed and Idriss (1971). Cyclic Stress Ratio (CSR) and Cyclic Resistance Ratio (CRR) were computed to obtain Factors of Safety (FS) under three earthquake scenarios (Mw = 5.0, 5.9, and 6.5). Results show that for Mw = 6.5, the shallow sandy layers at 0-3 m have FS = 0.07-0.21 (highly susceptible), while the 4.5-9 m interval is FS = 0.8-0.96 (marginal to near-threshold) and and the >10 m strata remain stable (FS > 1.2). For Mw = 5.9, shallow liquefaction is confined to 0-3 m (FS = 0.09-0.27), with the 4.5-9 m zone showing FS = 1.0-1.2 (marginal to stable). Even for Mw = 5.0, the 0-3 m layer yields FS = 0.14-0.41, indicating liquefaction susceptibility, whereas deeper layers are stable (FS > 1.0-1.2). These findings indicate that loose, saturated silty-sand layers with shallow perched groundwater are the most critical to cyclic softening. The site is underlain by reworked volcanic-colluvial materials derived from Mount Ungaran, characterized by fine-grained, near-saturated deposits within the upper 10 m. Compared with previous studies in northern Semarang, this study highlights the moderate liquefaction susceptibility of southern volcanic-colluvial terrains, an area rarely analyzed in Central Java and provides practical insights for toll-road foundation design and mitigation strategies in similar geological settings.
Co-Authors Anom Wibisono Ashadi, Reza Ferial Aspara, Wimpie Agoeng Noegroho Bernadette Detty Kussumardianadewi Budi Susetyo Desiana Vidayanti Komerdevi, Det Lily Kholida Pintor Tua Simatupang Ramli Nazir Ratnaningsih Ratnaningsih, Ratnaningsih Suprapti Suprapti Suprapti Suprapti Wibowo, Paksi Dwiyanto