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All Journal Jurnal Nuansa Akademik: Jurnal Pembangunan Masyarakat
Muhammad Ryan Iskandar
Universitas Cokroaminoto Yogyakarta Indonesia
Religion Civil Engineering, Building, Construction & Architecture Education Law, Crime, Criminology & Criminal Justice Social Sciences

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Genangan Banjir Sungai Gajahwong Yang Berdampak Terhadap Permukiman Bantaran Sungai di Kelurahan Pandeyan Muchamad Arif Budiyanto; Muhamad Arifin; Muhammad Ryan Iskandar; Muhammad Arif Hidayatullah
Nuansa Akademik: Jurnal Pembangunan Masyarakat Vol. 10 No. 1 (2025)
Publisher : Lembaga Dakwah dan Pembangunan Masyarakat Universitas Cokroaminoto Yogyakarta (LDPM UCY)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47200/jnajpm.v10i1.3075

Abstract

Flood events in Gajah Wong River have caused significant damages such as collapsed riverbanks, damaged neighborhood roads, and forced evacuations. The objective of this study is to visualize the areas along the Gajah Wong River that are affected by flooding during rainfall events, in order to determine the extent of inundated areas under specific return period discharges. This research aims to produce a flood inundation prediction map for the Gajah Wong River as a basis for flood mitigation efforts. The study uses primary data obtained through GNSS surveys, aerial photography, and river depth sampling. Secondary data used include return period discharges for Q2, Q10, and Q25. To calculate the inundated area, the researchers applied photogrammetry methods to generate orthophoto and DEM data, which were then simulated using HEC-RAS software to determine the flood inundation extent. The results of the study show that the flood-affected areas along the Gajah Wong River have inundation extents of 3.208 hectares for Q2, 3.942 hectares for Q10, and 4.601 hectares for Q25.
Pendampingan Teknis Pemilihan Sistem Atap untuk Meningkatkan Efisiensi Revitalisasi Gedung SMK Bakti 17 Jakarta Nurokhman Nurokhman; Muhammad Ryan Iskandar
Nuansa Akademik: Jurnal Pembangunan Masyarakat Vol. 11 No. 2 (2026): In Progress
Publisher : Lembaga Dakwah dan Pembangunan Masyarakat Universitas Cokroaminoto Yogyakarta (LDPM UCY)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47200/jnajpm.v11i2.3687

Abstract

This community service activity aims to provide technical assistance in the selection of an efficient roof system in the Revitalization Program of SMK Bakti 17 Jakarta. Assistance is carried out through a comparative evaluation between the reinforced concrete slab roof system and the light steel frame with concrete tile cover based on structural aspects, material needs, construction costs, and duration of implementation. The results of the assistance showed that the use of a light steel roof system was able to reduce the dead load by 78.09%, reduce the volume of concrete by 31.17%, reduce the need for reinforcement by 37.30%, produce construction cost efficiency by 30.08%, and accelerate the duration of work from 38 days to 19 days. This activity benefits partners by enabling more effective technical decision-making through the application of value engineering concepts to the revitalization of educational buildings, thereby fostering sustainable independence in school asset management.
Co-Authors Muchamad Arif Budiyanto Muhamad Arifin Muhammad Arif Hidayatullah Nurokhman, Nurokhman