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All Journal Teknik Sipil dan Arsitektur Teras Jurnal Jurnal Teknik Sipil dan Arsitektur Aceh International Journal of Science and Technology Jurnal Teknik Indonesia Advance Sustainable Science, Engineering and Technology (ASSET) Widya Teknik
Afifah, Risdiana Cholifatul
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Transportation

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The Identification of River Flow Capacity using the HEC-RAS 1D Model: Case Study of Sringin River Downstreamdy of the Sringin River Downstream Ikhwanudin, .; Afifah, Risdiana Cholifatul; Husodo, Ibnu Toto; Yudaningrum, Farida
Aceh International Journal of Science and Technology Vol 13, No 2 (2024): August 2024
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.13.2.40174

Abstract

The Sringin is a downstream river located in East Semarang. The Sringin River becomes the channel waste of the East Semarang district area. The Sringin River bank is surrounded by the Terboyo industrial area and settlement. The flood occurred in both areas, especially at Ngilir village, Genuk subdistrict. It is caused by low-capacity sedimentation channels and buildings occupying the channel body. The study aims to estimate flood discharge during repeat period 2, 5, 10, 25, 50, and 100 years on Sringin river downstream, analyze the capacity cross-section river, and identify the river water level profile when debit flowed with various period repeat flood. The hydrology calculation showed that flood discharge plans in the repeat period 2, 5, 10, 25, 50, and 100 years are 12.42; 16.67; 19.81; 30.7; 31.6; 33.22 m 3 /s. At the same time, the flow river capacity is 2.95 m/s in the upstream section and 15.52 m/s in the downstream section. Thus, floods occurred in some places when large discharges flowed. In period 2, the water level is about 1.0 to 1.5 meters. In more repeat periods, the level is higher. The conclusion is that the Sringin River cannot flow with perfect discharge, which exceeds its flow capacity.
Upaya Penyediaan Air Baku Melalui Peningkatan Infrastruktur Sumber Daya Air di Wilayah Sungai (WS) Jratunseluna Berdasarkan Sustainable Development Goals (SDG’s) Afifah, Risdiana Cholifatul; Ikhwanudin, Ikhwanudin Ikhwanudin; Anggorowati, Adriana Anteng; Husodo, Ibnu Toto; Nindita, Velma
Widya Teknik Vol. 24 No. 2 (2025): November
Publisher : Fakultas Teknik, Universitas Katolik Widya Mandala Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33508/wt.v24i2.6146

Abstract

Sustainable Development Goals (SDGs) adalah lanjutan dari Program Millenium Development Goals (MDGs). MDGs) adalah upaya untuk meningkatkan kehidupan masyarakat termiskin di dunia melalui 8 tujuan pembangunan, sedangkan SDGs memiliki 17 tujuan pembangunan berkelanjutan dengan 169 target, cakupannya lebih luas dari MDGs. Meskipun SDGs memiliki 17 tujuan utama, fokus pada artikel ini adalah air bersih dan sanitasi layak. Tujuan dari penelitian ini adalah untuk mengidentifikasi neraca air baku di WS Jratunseluna dan upaya-upaya meningkatkan kualitas air baku guna menunjang ketercapaian Target SDG's Tahun 2030. Metode yang dipilih adalah kualitatif, dengan data utama dikumpulkan melalui survei literatur dari berbagai sumber, termasuk buku, jurnal ilmiah, artikel, dan internet. Untuk melakukan review, peneliti akan menyelidiki jurnal-jurnal tertentu secara menyeluruh dan metodis menggunakan protokol yang telah ditetapkan. Berdasarkan analisa yang telah dilakukan, dapat diambil kesimpulan bahwa dengan kebutuhan total air baku di WS Jratunseluna pada awal tahun simulasi (2023) sebesar 50,57 m3/dt ternyata masih defisit dengan suplai yang dapat dilakukan hanya sebesar 48,77 m3/dt. Setelah dilakukan upaya penambahan dan optimalisasi infrastruktur air baku, dapat diprediksikan meningkatkan suplai hingga 62,79 m3/dt pada Tahun 2033 dengan berbagai kegiatan yang dilakukan. Sehingga diklaim dapat menutup defisit air yang terjadi pada awal tahun simulasi.
DISTRIBUSI SEDIMEN PADA WADUK JATIBARANG, KOTA SEMARANG Lestari, Fitria Maya; Pujiastuti, Ratih; Afifah, Risdiana Cholifatul
Jurnal Teknik Indonesia Vol 5, No 2 (2024): JTI (Jurnal Teknik Indonesia)
Publisher : Universitas Darul Ulum Islamic Centre Sudirman GUPPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61689/jti.v5i2.662

Abstract

The main issue in the operation of reservoirs is sedimentation. This can lead to silting and affect the reservoir's storage capacity. The distribution of sediments needs to be understood in order to gain an overview of their spread, so that measures can be taken to address sediment-related issues in the Jatibarang Reservoir. The analysis was conducted using sediment data from previous studies, which reported a total sediment volume of 6.64 million m³ over a period of 50 years. Based on topographic data, it was found that the Jatibarang Reservoir is classified as Type III, with a "hill" classification. The analysis results showed that the dimensionless factor F is 0.22, with a relative depth p of 0.53. Based on the sediment distribution analysis of the Jatibarang Reservoir with Empirical Area Reduction Method, it was found that after 50 years of operation, the new zero elevation of the reservoir would be at an elevation of +126.82 m. In comparison with the low water surface elevation at the existing dead storage of the Jatibarang Reservoir, which is at +136 m, it can be concluded that the Jatibarang reservoir can operate according to the planned lifespan and can still function for more than 50 years
Analisis Kinerja Struktur Bangunan Gedung Laboratorium 5 Lantai Terhadap Gempa Kuat Enggartiasto, Lintang; Kristiawan, Agung; Ikhwanudin, Ikhwanudin; Afifah, Risdiana Cholifatul
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 2 (2024): Volume 14 Nomor 2, September 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i2.1186

Abstract

Abstrak Perencanaan ketahanan gempa untuk bangunan gedung sangat diperlukan sebagai konsekuensi kondisi geografi Negara Indonesia yang sebagian besar memiliki resiko gempa yang tinggi. Penelitian ini membahas kinerja struktur gedung laboratorium 5 lantai eksisting terhadap gempa kuat. Metode yang digunakan meliputi non-linier statik pushover dan non linier dinamik riwayat waktu (time history). Rekaman gempa yang digunakan digunakan adalah gempa kuat dengan percepatan spektrum 0.2 detik dengan rasio redaman 5% untuk periode 2500 tahun. Hasil analisis pushover level kinerja struktur saat performance point arah X termasuk kategori Immediate Occupancy dan arah Y termasuk kategori Damage Control dengan parameter sistem struktur hasil analisis non linier yang memenuhi syarat terhadap parameter desain SNI 1726-2019. Drift ratio terbesar pada analisis riwayat waktu menghasilkan level kinerja struktur dengan kategori Damage Control. Disimpulkan dengan kategori level kinerja struktur tersebut, saat terjadi gempa kuat (periode 2500 tahun) struktur akan mengalami kerusakan struktural yang ringan dan masih dapat diperbaiki untuk difungsikan kembali. Kata kunci: Desain berbasis kinerja, analisis non-linier, level kinerja struktur  Abstract Due to the geography of Indonesia, most of which has a high seismic risk, seismic design of buildings is necessary. This research discusses the structural performance of an existing 5-story laboratory building against strong earthquakes.  The methods used include nonlinear static pushover and nonlinear dynamic time history. The earthquake record used is a strong earthquake with an acceleration spectrum of 0.2 seconds and a damping ratio of 5% for a period of 2500 years. The results of the pushover analysis of the structural performance level at the performance point in the X-direction include the Immediate Occupancy category and in the Y-direction include the Damage Control category with the structural system parameters of the nonlinear analysis results that meet the requirements of the SNI 1726-2019 design parameters. The largest drift ratio in the time history analysis results in a structural performance level with the Damage Control category. It is concluded that with this category of structural performance level, during a strong earthquake (2500 year period), the structure will experience minor structural damage and can still be repaired to function. Keywords: Performance Based Design, Non-Linier Analysis, Structural Performance Level
ALOKASI AIR BAKU DAS PAKIJANGAN DI KABUPATEN BREBES Ikhwanudin; Afifah, Risdiana Cholifatul; Husodo, Ibnu Toto; Wardani, Agustina
Jurnal Teknik Sipil dan Arsitektur Vol 31 No 1 (2026): Jurnal Teknik Sipil dan Arsitektur
Publisher : Fakultas Teknik Universitas Tunas Pembangunan Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jtsa.v31i1.5405

Abstract

The Pakijangan River Basin in Brebes Regency plays a critical role in supplying raw water for domestic, agricultural, and environmental needs. However, the absence of continuous streamflow records and increasing pressure on water resources pose significant challenges to effective management. This study aims to quantitatively estimate water allocation within the basin through a water balance approach. The methodology includes field surveys of existing conditions, analysis of water demand and availability, and water balance simulation using the RIBASIM (River Basin Simulation) model integrated with the Sacramento rainfall-runoff method. Rainfall data were obtained from two representative manual stations: Klampok and Slatri. Simulation results indicate that the Pakijangan Basin remains in surplus throughout the year, with dependable flow sufficient to meet all domestic and non-domestic water demands. With a distribution efficiency indicator (K factor) of 1, the basin even has the capacity to supply neighboring basins (Pemali River Basin) at a rate of 0.1 m³/s. These findings serve as a valuable foundation for sustainable, equitable, and efficient water resource planning and management in the region
Flood Mitigation in East Coast Semarang City: Hydrological and Hydraulic Analysis for Polder System Optimization Ikhwanudin; Harjanto, Imadudin; Afifah, Risdiana Cholifatul; Farida Yudaningrum
Advance Sustainable Science Engineering and Technology Vol. 8 No. 1 (2026): November - January
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i1.2764

Abstract

Flooding is a recurring hazard across Indonesia, particularly in urban regions such as Semarang City, where high-intensity rainfall, tidal surges, land subsidence, and changes in land use contribute to frequent inundation. This study investigates the effectiveness of the Sringin Polder system in mitigating flood risks through an integrated hydrological and hydraulic analysis. The hydrological component involved calculating design rainfall values for various return periods, with a peak intensity of 113 mm recorded for the 10-year event. These values were used to simulate flood discharges using HEC-RAS.For the 25-year return period, the main river channel produced a simulated flood discharge of 47.42 m³/s, resulting in water overtopping the left embankment by 0.545 m at station P.30.  calculated flood flow and the existing capacity of the river cross-sections.
ALOKASI AIR BAKU DAS PAKIJANGAN DI KABUPATEN BREBES Ikhwanudin; Afifah, Risdiana Cholifatul; Husodo, Ibnu Toto; Wardani, Agustina
Jurnal Teknik Sipil dan Arsitektur Vol 31 No 1 (2026): Jurnal Teknik Sipil dan Arsitektur
Publisher : Fakultas Teknik Universitas Tunas Pembangunan Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jtsa.v31i1.5405

Abstract

The Pakijangan River Basin in Brebes Regency plays a critical role in supplying raw water for domestic, agricultural, and environmental needs. However, the absence of continuous streamflow records and increasing pressure on water resources pose significant challenges to effective management. This study aims to quantitatively estimate water allocation within the basin through a water balance approach. The methodology includes field surveys of existing conditions, analysis of water demand and availability, and water balance simulation using the RIBASIM (River Basin Simulation) model integrated with the Sacramento rainfall-runoff method. Rainfall data were obtained from two representative manual stations: Klampok and Slatri. Simulation results indicate that the Pakijangan Basin remains in surplus throughout the year, with dependable flow sufficient to meet all domestic and non-domestic water demands. With a distribution efficiency indicator (K factor) of 1, the basin even has the capacity to supply neighboring basins (Pemali River Basin) at a rate of 0.1 m³/s. These findings serve as a valuable foundation for sustainable, equitable, and efficient water resource planning and management in the region
Co-Authors Adriana Anteng Anggorowati Agung Kristiawan Agustina Wardani Enggartiasto, Lintang Farida Yudaningrum Ibnu Toto Husodo, Ibnu Toto Ikhwanudin Ikhwanudin Ikhwanudin Ikhwanudin Ikhwanudin, Ikhwanudin Ikhwanudin Imadudin Harjanto Lestari, Fitria Maya Ratih Pujiastuti Velma Nindita, Velma Yudaningrum, Farida