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All Journal Maspari Journal BERKALA SAINSTEK Jurnal Teknik Sipil dan Perencanaan Jurnal Teknik Pengairan: Journal of Water Resources Engineering REKAYASA Jurnal Rekayasa Sipil dan Lingkungan Teras Jurnal U Karst Jurnal Rekayasa Sipil Jurnal Riset Rekayasa Sipil Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Jurnal Teknika Journal of the Civil Engineering Forum Warta LPM
Retno Utami Agung Wiyono
Jurusan Teknik Sipil, Fakultas Teknik, Universitas Jember
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Immunology & microbiology Mathematics Physics Social Sciences Transportation

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Flood Vulnerability Assessment of Kali Welang Floodplain by Using AHP-Based Methods Ageng Dwi Wicaksono; Entin Hidayah; Retno Utami Agung Wiyono
U Karst Vol. 5 No. 1 (2021): APRIL
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v5i1.1370

Abstract

Floods occur almost every year in a number of areas in the floodplain of Kali Welang. The floods have caused loss of materials and lives. Assessment of the vulnerability is essential for policy making in non-structural treatment of floods.  The objective of this paper is to compute and elaborate the flood vulnerability index in local scale to assess conditions that affect the magnitude of flood hazards.  This study identifies and evaluates the Flood Vulnerability Index (FVI) of an area by considering the factors of area’s exposure to floods, flood susceptibility, and flood resilience. The Analytic Hierarchy Process (AHP) is used to formulate the weights of each component. The values of the components were collected from interviews with policy makers from relevant governmental agencies. The inputs for the AHP were collected from the respondents in a questionnaire survey. This study selected 18 relevant indicators. The FVI results show very high vulnerability in local scale in one village and high vulnerability in other six villages. The results of this study can be used to construct non-structural strategies in flood mitigation by enhancing community’s resilience toward the flood. In addition, the results can be used for policy making process in spatial urban planning.
Performance Assessment of Bondoyudo Watershed Management Hery Budi Sulaksono; Gusfan Halik; Retno Utami Agung Wiyono
U Karst Vol. 5 No. 1 (2021): APRIL
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v5i1.1429

Abstract

Continues decrease of vegetation will result in a high erosion and sedimentation rate in the Bondoyudo watershed. This will result in reduced water retention capacity and accelerate land degradation. This study aims to monitor and evaluate the performance conditions of the Bondoyudo watershed according to the assessment parameters of the weighting criteria, which include land criteria, water management criteria, socio-economic criteria, water construction investment criteria, and space utilization criteria. Information about the upper part, middle part, and lower part of Bondoyudo River is collected from primary data, secondary data, and analysis results. The score of the watershed evaluation's carrying capacity is obtained from the results of the analysis from each weighting and scoring value of each criterion and sub-criteria. Watershed performance classifications are obtained by adding up the scores of each criterion. The watershed classification's total score is 103.25, which is classified as a medium recovery level category. It necessary to manage and restore the carrying capacity of the Bondoyudo watershed in supporting the development of water resources so that there is no decline in the performance of the Bondoyudowathersed. Recommended activity plans are water resources conservation, and utilization integrated control and involving stakeholders in watershed management
Perencanaan Bangunan Pelindung Pantai Di Desa Pesisir Besuki Kabupaten Situbondo Sabda Alam Akbar; Retno Utami Agung Wiyono; Entin Hidayah
TERAS JURNAL Vol 13, No 1 (2023): Volume 13 No 1, Maret 2023
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v13i1.816

Abstract

Abstrak Desa Pesisir yang terletak di Timur Pelabuhan Besuki Kabupaten Situbondo mengalami tangkis jebol dan rusak sepanjang 450 meter akibat diterjang gelombang laut. Angin kencang dan ombak besar yang menerjang tangkis pada 28 Januari 2021 itu mengakibatkan tangkis hancur di beberapa titik sepanjang garis pantai. Penelitian ini direncanakan 2 alternatif pelindung pantai yaitu revetment dan seawall sebagai perbandingan bangunan pelindung pantai yang cocok di Desa Pesisir Besuki untuk mengatasi permasalahan yang terjadi. Hasil perhitungan dimensi untuk bangunan revetment yaitu elevasi puncak sebesar 5.90 m dan lebar yaitu 2.13 dan dimensi seawall yang didapat yaitu tinggi puncak bangunan yaitu 6.10 m dan lebar 2.55 m. Total Rencana Anggaran Biaya (RAB) perencanaan kedua alternatif bangunan yaitu revetment blok beton 3B sebesar Rp. 59,699,911,000.00 dan seawall sebesar Rp. 59,350,778,000.00 dan dipilih seawall sebagai alternatif solusi bangunan pelindung pantai di Desa Pesisir Besuki Kabupaten Situbondo. Kata kunci: abrasi, revetment, seawall, pantai.   Abstract Pesisir village is located east of Besuki Harbor, Situbondo Regency, experienced a 450-meter being hit by sea waves. Strong winds and big waves that hit the seawall on January 28, 2021 caused the seawall to be destroyed at several points along the coastline. This study plans 2 alternative coastal protection, namely revetment and seawall as a comparison of suitable coastal protection buildings in Village Pesisir Besuki to overcome the problems that occur. The results of the calculation of dimensions for the revetment building are the peak elevation 5.90 m and the width 2.13 m and the dimensions of the seawall obtained are the peak height of the building which is 6.10 m and width is 2.55 m. The Total Budget Plan (RAB) for the planning of the two alternative buildings, namely the 3B concrete block revetment, is Rp. 59,699,911,000.00 and a seawall of Rp. 59,350,778,000.00 and selected seawall as an alternative solution for coastal protection buildings in Village Pesisir Besuki, Situbondo Regency. Keywords: abrasion, revetment, seawall, beach.
Tsunami Disaster Risk Assessment Using a Geographic Information System for Puger Sub-District, Jember Regency Suparno Suparno; Retno Utami Agung Wiyono; Entin Hidayah; Wei Koon Lee
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 14 No. 1 (2023)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2023.014.01.2

Abstract

The southern region of East Java is located on the Indo-Australian plate. The shifting of these plates allows for earthquakes that trigger tsunamis to occur. The earthquake leads to the impact of a tsunami in several areas, one of which is Puger Sub-District, Jember Regency. The main economic activity of the Puger Sub-District is the fishery; hence significant local coastal communities are vulnerable to tsunami threats. This study aims to map the tsunami risk using a Geographic Information System. The tsunami hazard map used the analysis of the tsunami inundation map from the BMKG. Vulnerability and capacity maps were prepared based on BNPB Chief Regulations. Vulnerability is evaluated based on social, physical, environmental, and economic data. Capacity considers components of the institution, early warning and risk analysis or evaluation, disaster awareness education, reduction of basic risk, and preparedness. The hazard, vulnerability, and capacity maps are classified into five classes. The tsunami risk map is then derived by overlaying the three input maps. Results showed that the villages with very high risk are Puger Kulon and Mojosari at the coastal front areas, covering an area of 13.01% of the total regional area of the Puger Sub-District.
Risk Mapping of Tsunami Ambulu Sub-District, Jember Regency Adden Ramadhan Syarif Ardi; Gusfan Halik; Retno Utami Agung wiyono
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 14 No. 1 (2023)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2023.014.01.8

Abstract

Tsunami risk level mapping was carried out in Ambulu Sub-District, Jember Regency, to determine the tsunami risk level in the area. Tsunami risk mapping was carried out by including several components such as vulnerability, which consists of several assessment aspects by the Chief of the National Disaster Management Agency Regulation of the Year 2012, and capacity, which is weighted according to the Chief of the National Disaster Management Agency Regulation of the Year 2012. The hazard component was generated from the bathtub method. The tsunami risk level was obtained after overlaying using a GIS application (Geographic Information System). A very high level of risk is found to apply for Sumberejo Village, with an area of 286 Ha, and Sabrang Village, with an area of 288 Ha. Villages at very high risk are directly adjacent to the coast and have high vulnerability and low disaster management capacity. The other villages, such as Karanganyar Village, Ambulu Village, Tegalsari Village, Andongsari Village, and Pontang Village, do not have a very high tsunami risk because they are far from the coastline and have low vulnerability and high disaster response capacity.
Program Pemasangan Sistem Pemanenan Air Hujan di Masjid Al-Ikhlas Puri Bunga Nirwana Jember Retno Utami Agung Wiyono; Abdur Rohman; Meta Fitri Rizkiana; Joseph Dwi Kurniawan Manno
Warta LPM WARTA LPM, Vol. 25, No. 3, Juli 2022
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1850.866 KB) | DOI: 10.23917/warta.v25i3.1024

Abstract

Air termasuk sumber daya alam yang dapat diperbaharui. Akan tetapi pada kenyataannya, krisis air terus-menerus terjadi sehingga air sumur yang merupakan air tanah harus dihemat penggunaannya. Sebelum program pengabdian ini dilakukan, air sumur merupakan satu-satunya sumber air yang digunakan para jemaah di Masjid Al-Ikhlas, Puri Bunga Nirwana, Jember. Dengan adanya pandemi Covid-19, maka kebutuhan air di masjid semakin meningkat karena jemaah masjid dianjurkan untuk lebih sering mencuci tangan. Di sisi lain, curah hujan di kawasan masjid ini pada musim hujan cukup tinggi. Karena itu, diperlukan upaya untuk memenuhi kebutuhan air jemaah dengan memanfaatkan air hujan untuk mengurangi konsumsi air sumur. Tujuan program pengabdian ini adalah memasang Sistem Pemanenan Air Hujan (PAH) di Masjid Al-Ikhlas untuk menghemat penggunaan air sumur. Sistem PAH memanfaatkan sisi atap sebelah Timur dan Utara masjid untuk menampung air hujan. Air hujan yang ditampung di talang kemudian disalurkan ke pipa yang dihubungkan ke tandon pertama. Dari tandon pertama, air masuk ke dalam filter yang kemudian dihubungkan ke tandon kedua tempat penyimpanan air yang sudah bersih. Setelah itu, air disalurkan melalui pompa untuk masuk ke tandon utama masjid yang digunakan untuk mensuplai kebutuhan air masjid. Hasil dari program pengabdian ini adalah bahwa sistem PAH betul-betul mengurangi konsumsi air sumur. Pada waktu-waktu tertentu, air dari sistem PAH dapat memenuhi kebutuhan air secara penuh sehingga air sumur tidak perlu digunakan. Dapat disimpulkan bahwa PAH sangat bermanfaat untuk mensuplai air di masjid sekaligus mengurangi konsumsi air sumur terutama saat musim penghujan. Setelah dipasang sekitar 6 bulan, perlu dilakukan perawatan terhadap sistem PAH di antaranya memperkuat sistem penyangga pada pipa, mengganti filter air. Selain itu, diharapkan dapat dibuat otomatisasi sistem sehingga penarikan air dari tandon PAH ke tandon utama masjid tidak perlu dilakukan secara manual.
Penentuan Desain Optimum Penstock untuk Pembangkit Listrik Tenaga Mikrohidro di Sungai Poreng, Jember Aldio Dhiva Pratama; Entin Hidayah; Retno Utami Agung Wiyono
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 12 No. 1 (2021)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2021.012.01.07

Abstract

Pipa pesat merupakan saluran penghubung antara bak penenangdengan turbin pada rumah pembangkit. Meminimalisir kehilanganenergi pada pipa pesat sangat penting untuk mengoptimalkanbangkitan energi listrik. Tujuan penelitian ini adalah melakukanoptimasi diameter dan tebal pipa pesat untuk mencari hasil yangpaling efisien, yang dikaji dari aspek hidrolika dan biayanya.Metode pemilihan pipa pesat yang optimal dapat ditentukanberdasarkan hubungan secara empiris, antara berbagai formula daridiameter dan tebal pipa pesat yang dinilai terhadap energi yangdihasilkan serta harga pipa pesat itu sendiri. Hasil penelitianmenunjukkan bahwa besar diameter berbanding lurus dengan besarenergi yang dihasilkan dan harga pipa pesat. Berdasarkanperbandingan, didapatkan diameter optimum pipa pesat sebesar0,45 meter dengan tebal 0,0018 meter yang dihitung menggunakanformula dari Moffat, serta daya bangkitan sebesar 52,16 kW danenergi sebesar 456.914,33 kWh per tahunnya dengan harga pipaIDR 3.610.900 per meter pipa pesat.Penstock is the connecting channel between the forebay and theturbine in the power house. Minimizing the energy loss in thepenstock is very important to optimize the generation of electricalenergy. The purpose of this research is to optimize the diameterand thickness of penstock to find the most efficient results, whichare examined from the aspects of hydraulics and costs. The optimalmethod of penstock selection can be determined based on theempirical relationship between the various formulas of the diameterand thickness of the penstock as assessed by the energy producedand the price of the penstock itself. The results showed that thediameter was directly proportional to the amount of energyproduced and penstock price. Based on the comparison, theoptimum diameter of the penstock is 0,45 meters with a thicknessof 0,0018 meters which is calculated using the formula fromMoffat, as well as a generation power of 52,16 kW and energy of456.914,33 kWh yearly with the price of IDR 3.610.900 per meterpenstock pipe.
Tsunami – Tides Interaction of the South Coast of Jember Using Delft3D-Flow Narulita, Norma Aulia; Wiyono, Retno Utami Agung; Halik, Gusfan; Pratama, Munawir
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 14 No. 2 (2023)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2023.014.02.5

Abstract

The tsunami of June 3, 1994, which originated from a shift in the Indo-Australia plate, resulted in hundreds of casualties and material damage on the south coast of Jember. This study aims to understand the tidal impact of a tsunami in terms of arrival time and wave height. Several simulations of the interaction of tidal waves with tsunami waves were carried out through numerical modeling using Delft3D with modified wave characteristics from the Banyuwangi tsunami on June 3, 1994, as well as using bathymetry data from BATNAS and BIG tide data. The results of the analysis show that tidal waves can be a factor affecting the height of the tsunami waves. The increase in the amplitude of the tsunami waves was considered very local from the three observation points. This is shown at the observation locations of Puger Beach and Watu Ulo Beach, where the maximum wave amplitude occurs when the tsunami occurs independently of 7.102 m and 5.56 m, while at the Tanjung Pelindu observation location, the highest amplitude occurs when the tsunami meets the tides during low tide phase, which is 3.68 m. This research is expected to provide a basic understanding of the dynamic impact of the tidal wave when a tsunami occurs.
Mapping the Lava Flood Hazard Using the Flood Discharge Approach and 2D Hydrodynamic Modeling at the Rejali River, Mount Semeru Prawira, Akbar Bagus; Hidayah, Entin; Wiyono, Retno Utami Agung
Journal of the Civil Engineering Forum Vol. 10 No. 2 (May 2024)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.8463

Abstract

In December 2021, Mount Semeru experienced an eruption accompanied by extreme rainfall, which resulted in lava floods, known as lahars or debris flows. The lava flood destroyed infrastructure, resulting in loss of life. Various rivers surrounding Mount Semeru, including the Rejali River, experienced the effects of this phenomenon. To address this, a study is needed to analyze the occurrence and frequency of lava floods over specific time intervals through the creation of a hazard map. This study aims to map the hazard of lava floods for various return periods using a coupled HEC-HMS and HEC-RAS software alongside a lava flood discharge approach. The HEC-HMS software is used to simulate hydrological processes, to obtain the lava flood discharge, while the HEC-RAS is used to model a two-dimensional (2D) lava flood hazard map. The input parameters of the modeling in this study are rainfall intensity, soil type, land cover, river distance, slope, and elevation. The results show that the flood area covers 9.55% of the total study area by 2 year return period (Q2), 11.80% by Q10, 14.10% by Q50, and 15.72% by Q200 with an overall validation Root Mean Square Error (RMSE) of 0.16. These changes are determined by the discharge volume from each return phase and the river's shallow depth, which causes overflow beyond the river's ability to accommodate the flow. Thus, this study suggests that the models successfully generated a reliable model for mapping the risk of lava floods on the Rejali River. These findings can help the government reduce disaster losses through adequate adaptation and mitigation initiatives.
Study of Rainfall and Water Discharge Spatial Variability Using Exploratory Spatial Data Analysis Method in Bondowoso Regency Faillasuf, Vide Mirza; Halik, Gusfan; Wiyono, Retno Utami Agung
BERKALA SAINSTEK Vol 9 No 1 (2021)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v9i1.16179

Abstract

The difference in rainfall intensity affects the hydrological cycle as a process that greatly determines the amount of water discharge. Thus, in water resources management, it is important to determine the distribution pattern of rainfall and discharge. By studying the characteristics of rainfall distribution patterns and water discharge, the potential of water resources can be illustrated well. This study uses the Exploratory Spatial Data Analysis method to examine spatial variability of rainfall intensity and water discharge in Bondowoso Regency. Rainfall and discharge data are collected from 35 rain stations and 227 weirs in 2008 until 2018. This study produces monthly average rainfall distribution values between 190 mm / month with monthly average discharge between 7300lt/sec/month. Meanwhile, the obtained average annual rainfall distribution values are between 2300 mm/year with annual average discharge values between 105000 lt/sec/month. The spatial distribution map using IDW method produces information on the potential of water resources as follow: the higher the height of a place, the higher the average monthly rainfall, while the lower the height of a place, the higher the average monthly discharge. As for the obtained correlation value between rainfall and discharge is R² = 0.665.
Co-Authors Abdur Rohman Adden Ramadhan Syarif Ardi Ageng Dwi Wicaksono Agil Priyanto Aldio Dhiva Pratama Alfiati Ningsih Citra Malini Entin Hidayah Fahir Hassan Faillasuf, Vide Mirza Fista Pebriyanti Gusfan Halik Hajar Crisia Cahyani Hery Budi Sulaksono Imanda, Regita Ramadhani Indra Nurtjahjaningtyas Joseph Dwi Kurniawan Manno Meta Fitri Rizkiana Narulita, Norma Aulia Nur Alif Ryanto Pratama, Munawir Prawira, Akbar Bagus Prihartami, Sabrina Putra, Victorius Setiaji Putri, Fidyasari Kusuma Ratih, Masita Risqi Sofiana Robbani, Hilma Wasilah Sabda Alam Akbar Saifurridzal Suparno Suparno Vanadani Pranantya Wei Koon Lee Windy Bana Alam Perkasa Wiwik Yunarni Widiarti