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All Journal Aptekmas : Jurnal Pengabdian Kepada Masyarakat Jurnal Konstruksi Jurnal Inovasi Konstruksi
Syamsul Bahri
Politeknik Pekerjaan Umum
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Pengendalian Limpasan Air Hujan di Rusun Mahasiswa Kampus 2 Politeknik PU Semarang Wildan Herwindo; Ingerawi Sekaring Bumi; Suhardi Suhardi; Syamsul Bahri; Andi Patiroi
Jurnal Konstruksi Vol 21 No 1 (2023): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.21-1.1302

Abstract

Flood events around the world tend to increase. Based on data from BNPB, floods in Indonesia are one of the disasters with the highest incidence. Flood disasters often occur in big cities in Indonesia such as Jakarta, Bandung, Samarinda and Semarang. Polytechnic of Public Works is a campus located in Semarang City and is a flood-prone area because it is situated on a lowland. Efforts are made to control rain runoff to reduce the potential for flooding on the PU Polytechnic campus. This study aims to determine the effectiveness of controlling rainwater runoff through the construction of infiltration wells in the student flats (flats) on campus 2 of the Public Works Polytechnic. The research was carried out by analyzing runoff discharge in the flat area and testing the soil permeability in that area. The research was conducted using quantitative methods using primary and secondary data. Primary data was obtained from soil permeability measurements while secondary data used included rainfall data, drainage master plans and Digital Elevation Model (DEMNAS) maps. Based on the research, the results obtained from measuring the permeability value of the soil in the PU Polytechnic flats area have a value of 0.029-1.680 cm/hour, which is included in low permeability. The results of soil permeability and geoelectrical tests showed that the soil conditions at the study site were water-saturated soils, making it difficult to absorb water into the soil. Analysis of the capacity of infiltration wells using a minimum permeability value of 0.029 cm/hour required 38,217 infiltration wells, while calculations with a maximum permeability value of 1.680 cm/hour required 660 infiltration wells. The number of needs for infiltration wells can be reduced by taking into account the volume of storage and the pattern of operation of the reservoirs in the student flat area of Campus 2 of the Public Works Polytechnic. The condition of the research location which is relatively saturated with water and has low permeability makes it difficult for water to absorb, so it is necessary to carry out further research to find other alternatives that are more suitable to be applied to that area.
SOSIALISASI PENGELOLAAN BANJIR BANDANG BERBASIS MASYARAKAT DALAM MITIGASI BENCANA DI KABUPATEN CILACAP Wildan Herwindo; Ingerawi Sekaring Bumi; Wahyu Prasetyo; Syamsul Bahri; Tia Hetwisari
Aptekmas Jurnal Pengabdian pada Masyarakat Vol 6 No 2 (2023): Aptekmas Volume 6 Nomor 2 2023
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36257/apts.v6i2.6550

Abstract

Limbangan Village is located at the Wanareja District, Cilacap Regency, Central Java. It is one of the areas prone to flash floods. Based on data, flash floods were recorded on 27 October 2021 which were caused by the overflow of the Cigeugeumeuh River and resulted in hundreds of houses and markets being damaged. Therefore, to reduce losses due to disasters that occur, especially flash floods in Limbangan Village, mitigation efforts are carried out in the form of socialization of community-based management of flash floods. Efforts to carry out community-based flood management in Cilacap Regency, were carried out through collaboration between the Public Works Polytechnic and Limbangan Village. The socialization of flood management in Limbangan Village uses concept of participatory rural community social approach or Participatory Rural Appraisal (PRA). At the end, community service activities in Cilacap Regency by the Public Works Polytechnic, Semarang have been successfully held. The results achieved in the implementation of this community service are the provision of information on rainfall that has the potential to cause flash floods, the learning process of disaster mitigation as a preparedness measure for flash floods, flood-prone and evacuation maps, and communication tools as a continuation of the community service program.
Pengurangan Limpasan Menggunakan Biopori Cocopeat-Bioswale sebagai Cadangan Air Ruang Terbuka Hijau (RTH) Perkotaan Musim Kemarau Waldemar Victoryno Simamora; Muhammad Farizal; Ghaniyyu R. A. L. Raharjo; Syamsul Bahri
Jurnal Inovasi Konstruksi Vol 1, No 2 (2022): October
Publisher : Politeknik Pekerjaan Umum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56911/jik.v1i2.27

Abstract

Penerapan jalur hijau jalan (JHJ) dengan vegetasi dapat mengurangi permasalahan pencemaran udara dan meningkatkan luasan RTH di kawasan perkotaan. Namun, desain JHJ sering kali mengalami permasalahan, seperti vegetasi tidak terawat hingga mati akibat kekeringan pada musim kemarau. Solusi yang dapat dipertimbangkan adalah menerapkan infrastruktur hijau, berupa bioswale yang dikombinasikan dengan biopori cocopeat. Penelitian ini menggunakan metode eksperimental dengan memodelkan bioswale berbentuk box kaca yang dilengkapi biopori berisi cocopeat. Tujuan penelitian ini adalah a). Mengetahui kemampuan cocopeat dalam menyerap air, b). Mengetahui laju infiltrasi air dalam bioswale, c). Mengetahui seberapa besar peran biopori cocopeat pada bioswale dalam mengurangi volume air untuk penyiraman JHJ yang berpengaruh terhadap efisiensi biaya penyiraman. Hasil penelitian menunjukkan cocopeat sebesar 50 dan 75 gram yang direndam selama 24 jam mampu menyerap air sebanyak 5 hingga 6 kali dari berat awalnya. Uji coba cocopeat sebagai isian biopori dan ditempatkan dalam bioswale, nilai rata-rata laju infiltrasi tertinggi sebesar 0,542 cm/jam pada 24 jam, kemudian mengalami penurunan nilai hingga 0,1 cm/jam pada 168 jam. Apabila bioswale ditempatkan pada JHJ seluas 100 m2 dengan penutupan biopori cocopeat sekitar 50%-nya, kemudian terjadi satu hari hujan, dalam bioswale terdapat cadangan air sebagai reservoir mini sehingga pengeluaran biaya penyiraman dapat dihemat lebih dari Rp2.000.000.
Pengembangan Awal Alat Pemanen Alga Sistem Rotating Filtered-Drum Untuk Perbaikan Kualitas Air di Perairan Tergenang Syamsul Bahri; Pranu Arisanto; Suhardi Suhardi; Wildan Herwindo
Jurnal Inovasi Konstruksi Vol 2, No 2 (2023): October
Publisher : Politeknik Pekerjaan Umum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56911/jik.v2i2.76

Abstract

The phenomenon of overgrowth of green algae and cyanobacteria indicates a serious aquatic environmental problem from eutrophication. In aquatic ecosystems, algae are an integral part of the ecological system. But when there is abundant algae growth in the waters it causes the phenomenon of harmful alga blooms. Algae that were previously invisible, due to clumping, this group becomes invisible to the eye. The follow-up impact of the algae blooms is fish death, due to lack of oxygen at night. Algal masses that are swept by the wind onto the shores of bays and reservoir shores cause buildup and decay. Among the efforts that can be made in dealing with the phenomenon of abundant algae in waters is harvesting. In this study, the technique of harvesting by filtration and centrifugal rotation in a drum was applied. The purpose of this study was to design and build a filtration system algae harvester with a Rotating Filtered-Drum type. The results of preliminary research on filtration of water contaminated with algae from the facultative pond of the Bojongsoang-Bandung WWTP by gravity showed that the T 165 filter was able to reduce TSS levels as an indicator of algae by 72.85%. The Rotating Filtered-Drum tool requires further research for operational trials using pool water contaminated with algae. Keywords: algal blooming, lentic waters, euthrophic, green algae, cyanobacteria.
Co-Authors Andi Patiroi Ghaniyyu R. A. L. Raharjo Ingerawi Sekaring Bumi Ingerawi Sekaring Bumi Muhammad Farizal Pranu arisanto Suhardi Suhardi Suhardi Suhardi Tia Hetwisari Wahyu Prasetyo Waldemar Victoryno Simamora Wildan Herwindo Wildan Herwindo