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All Journal Indonesian Journal of Geography Jurnal Teknik Sipil dan Perencanaan Rengganis Jurnal Pengabdian Masyarakat
Muhammad Islamy Rusyda
Universitas Muhammadiyah Mataram
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Economics, Econometrics & Finance Education Mathematics Social Sciences

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Flume Experiments on Wood Debris Jam at An Arch Bridge in Upstream River Reach during Flash Flood Rusyda, Muhammad Islamy; Ikematsu, Shinya; Hashimoto, Haruyuki
Jurnal Teknik Sipil dan Perencanaan Vol 22, No 1 (2020): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v22i1.21336

Abstract

Abstract During our field surveys, two types of woody debris deposition were found. One is deposition of individual wood pieces and the other is formation of woody debris jams at obstructions such as a bridge. To investigate behavior of wood debris jam at a bridge, a series of flume experiments was performed in a smooth acrylic rectangular flume. A model of an arch bridge was used as an obstacle in river. The arch bridge was based on Yoriguci bridge. Wooden cylinder was used as model of wood debris. An interpretation of experimental results shows that the wood debris jam can be determined by number of released wood pieces and shaded area of obstructions. These experimental results also reveal that wood debris jam formed by the model bridge contribute to backwater rise. From investigation on flow around model bridge, it is clearly shown the presence of backwater rise caused by the number of wood pieces trapped by a model of an arch bridge. The results also show that the loss coefficient depends on trapped wood pieces. A simple procedure was proposed in this study which seem to provide for predicting backwater rise due to wood debris jam at obstructions.
Flume Experiments on Wood Debris Jam at An Arch Bridge in Upstream River Reach during Flash Flood Rusyda, Muhammad Islamy; Ikematsu, Shinya; Hashimoto, Haruyuki
Jurnal Teknik Sipil dan Perencanaan Vol 22, No 1 (2020)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v22i1.21336

Abstract

Abstract During our field surveys, two types of woody debris deposition were found. One is deposition of individual wood pieces and the other is formation of woody debris jams at obstructions such as a bridge. To investigate behavior of wood debris jam at a bridge, a series of flume experiments was performed in a smooth acrylic rectangular flume. A model of an arch bridge was used as an obstacle in river. The arch bridge was based on Yoriguci bridge. Wooden cylinder was used as model of wood debris. An interpretation of experimental results shows that the wood debris jam can be determined by number of released wood pieces and shaded area of obstructions. These experimental results also reveal that wood debris jam formed by the model bridge contribute to backwater rise. From investigation on flow around model bridge, it is clearly shown the presence of backwater rise caused by the number of wood pieces trapped by a model of an arch bridge. The results also show that the loss coefficient depends on trapped wood pieces. A simple procedure was proposed in this study which seem to provide for predicting backwater rise due to wood debris jam at obstructions.
Woody debris production and deposition during floods at extreme rainfall period 2012-2013 in Yabe and Tsuwano River Basin, Japan Muhammad Islamy Rusyda; Sinya Ikematsu; Haruyuki Hashimoto
Indonesian Journal of Geography Vol 52, No 3 (2020): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.55449

Abstract

The behavior of woody debris has become a critical issue in river dynamics. It is still not widely understood, particularly during a flood event. Field investigations were performed to investigate the characteristics of woody debris production and deposition during the 2012 and 2013 floods in Yabe and Tsuwano River Basin, Japan. Ground-level photos, aerial photos, and direct measurements were used to measure the length and diameter of woody debris,   characteristics of obstacles (length. width, diameter, and shape). These investigations revealed that woody debris deposition was divided into two types: the rest of individual woody debris pieces on the riverside slope or floodplain and the formation of a woody debris jam at obstacles such as bridges, riparian trees, houses, and irregular topographic relief. Individual woody debris pieces at the production sites are around two times longer than those at the deposition sites. However, the variation coefficient of piece length at the production sites is smaller than that at the deposition site. Our results also show that the most extended piece in the jam and horizontal scale of the obstacle are two essential factors in jam formation. An empirical equation for predicting the apparent volume of jam at an obstacle is also proposed.
Penerapan Sistem Pemanenan Air Hujan Sebagai Upaya Antisipasi Bencana Kekeringan Di Dusun Sepi, Sekotong Muhammad Khalis Ilmi; Muhammad Islamy Rusyda; Agustini Ernawati; Titik Wahyungingsih; Ari Ramadhan Hidayat; Anwar Efendy; Intan Novianti; Feri Irawan; Chairil Anhar
Rengganis Jurnal Pengabdian Masyarakat Vol. 2 No. 2 (2022): November 2022
Publisher : Pendidikan Matematika, FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/rengganis.v2i2.207

Abstract

The threat of drought that occurs every year will have an impact on hampering the activities of residents Dusun Sepi, Buwun Mas Village, Sekotong District. Therefore, it is necessary to make efforts to overcome the threat of a clean water crisis due to drought by conserving water or looking for alternative water sources. The application of a rainwater harvesting system (PAH) can be a solution to this problem. The purpose of this community service activity is to provide socialization and applications regarding efforts to anticipate drought disasters. The method used is a knowledge approach by providing socialization and application of the PAH system in one of the buildings at the Zainul Hafidz Islamic Boarding School At-Taufiq, Dusun Sepi, Buwun Mas Village, Sekotong District. The socialization activity took place on June 4, 2022 and went smoothly and orderly. During the implementation of the service activities, partners, in this case the residents of the Zainul Hafidz At-Taufiq Islamic Boarding School and the residents of the quiet hamlet, were very enthusiastic in participating in the socialization and application of rainwater harvesting (PAH) or roof-based rain water harvesting on a household scale with 54 participants. who came from the residents of the Islamic boarding school and residents around Dusun Sepi. From the estimated demand for clean water for Islamic boarding schools, with the PAH system as an alternative water source, the fulfillment of clean water needs for Islamic boarding schools can be helped by 3%.
Co-Authors Agustini Ernawati Anwar Efendy Ari Ramadhan Hidayat Chairil Anhar Feri Irawan Haruyuki Hashimoto Hashimoto, Haruyuki Ikematsu, Shinya Intan Novianti Muhammad Khalis Ilmi Sinya Ikematsu Titik Wahyungingsih