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All Journal Journal of Engineering and Technological Sciences Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) Jurnal Teknik Sipil Journal on Education JURNAL TEKNIK HIDRAULIK Jurnal Sosial dan Teknologi Journal of the Civil Engineering Forum Aceh International Journal of Science and Technology
Sri Legowo WD
Faculty Of Civil And Environmental Engineering, Institut Teknologi Bandung
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Engineering Environmental Science Law, Crime, Criminology & Criminal Justice

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Model Hak Guna Air dan Insentif / Disinsentif Bagi Pemerintah Otonomi Kabupaten / Kota di Jawa Barat (Studi Kasus DAS Cimanuk – Jawa Barat) Suardi Natasaputra; Hang Tuah; Sri Legowo; Indratmo Soekarno
Jurnal Teknik Sipil Vol 13 No 2 (2006)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2006.13.2.3

Abstract

Abstrak. Penelitian ini mempelajari model hak guna air (HGA) dan model insentif / disinsentif bagi daerah otonom kabupaten yang diformulasikan berdasarkan kondisi tataguna lahan dan karakteristik alamiah daerah aliran sungai (DAS). Tujuannya untuk meningkatkan sinergitas dan keterpaduan pengelolaan SDA secara keseluruhan DAS. Karena air merupakan komoditas yang vital dan esensial serta rawan konflik dalam kehidupan manusia, model HGA pada masing-masing daerah otonom didasarkan atas ketersediaan air pada setiap kabupaten/kota berdasarkan hujan rata-rata tahunan yang jatuh pada wilayah kabupaten/kota (daerah otonom) dikurangi debit minimum untuk menjaga kelestarian biota sungai. Model insentif/disinsentif didasarkan pada parameter sisa HGA suatu daerah otonom yang dapat dimanfaatkan oleh daerah otonom lainnya. Parameter tersebut dalam model diinterpretasikan sebagai koefisian manfaat (Cm), koefisien sisa (Cs), dan koefisien bobot (Cb). Besarnya insentif bagi kabupaten surplus air adalah perkalian dari koefisien-koefisien tadi dengan jumlah pendapatan daerah seluruh DAS (hasil hak guna usaha air). Simulasi model pada DAS Cimanuk, menunjukan Kabupaten Garut, Sumedang, dan Majalengka memiliki HGA lebih besar dari jumlah pemakaiannya (surplus), sedangkan kabupaten Indramayu mengalami kekurangan (defisit). Kelebihan air dari 3 (tiga) kabupaten tersebut dimanfaatkan selain untuk memenuhi kebutuhan air di kabupaten Indramayu, juga untuk kabupaten Cirebon dan kota Cirebon sebagai tetangga terdekat. Daerah yang mendapat insentif pada DAS Cimanuk, adalah kabupaten Garut, Sumedang, dan Majalengka, dan yang mendapat disinsentif adalah kabupaten Indramayu, Cirebon, dan Kota Cirebon. Upaya konservasi seperti perubahan pola tata guna lahan dan pembangunan waduk seperti waduk Jatigede di Kabupaten Sumedang, sangat berpengaruh terhadap peningkatan penghasilan masing-masing daerah otonom. Model insentif bermafaat untuk mengatur pembagian peran dan bagi hasil pajak antara propinsi dan kabupaten didalam DAS.Abstract. This study observed water rights and incentive/disincentive models for autonomous kabupaten/kota which are formulated based on land management condition and natural characteristics of the related river basin. The objective of this research is to improve river basin management integratedly andsynergically. As water is a vital and essential commodity yet a sources a conflict in human life, water rights model in every autonomous government is based on the water availability in the related autonomous region (kabupaten/kota) taken from annual rainfall minus minimum discharge in order to keep river biota conservation. Incentive/disintencive model is based on the parameter of the remaining water rights in one autonomous region able to be benefited by other autonomous regions. This parameter is interpreted as beneficial coefficient (Cm), remaining coefficient (Cs), and weight coeffisient (Cb). The amount of incentive for kabupaten with water surplus is the multiplication of the abve mentions coeffients with the total number of income throughout those river basins (water rights outcome). Model simulation in the Cimanuk river basin showed that Kabupaten Garut, Sumedang, and Majalengka possess greater water rights from the point of view of their usage (surplus), whereas Kabupaten Indramayu experienced deficit. Water excesses from those three kabupaten is benefited to meet water requirement not only by Kabupaten Indramayu, but by Kabupaten Cirebon and Kota Cirebon as well as the nearest neighbours. The areas obtaining insentive from the Cimanuk river basin are Kabupaten Garut, Sumedang, and Majalengka, and those which obtaining disincentive are Kabupaten Indramayu, Cirebon and Kota Cirebon. The conservation efforts such as changing in land management pattern and dam construction like Jatigede dam at kabupaten Sumedang, strongly influenced to the increase of income of the related autonomous governments. The incentive model is very beneficial to arrange the distribution of role and tax sharing between provincial and the kabupaten governments within river basin.
Pengoperasian dan Umur Guna Waduk (Studi Kasus : Waduk Cimeta Padalarang) Sri Legowo; Iwan Kridasantausa Hadihardaja; Susi Rabuanawati
Jurnal Teknik Sipil Vol 13 No 4 (2006)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2006.13.4.4

Abstract

Abstrak. Metode simulasi dan optimasi merupakan dua metode yang sering digunakan dalam pengelolaan sumberdaya air. Dalam penulisan jurnal ini metode tersebut digunakan untuk memperoleh suatu metode pemanfaatan sumberdaya air dari Waduk Cimeta pada Sungai Cimeta - Jawa Barat. Metode simulasi yang digunakan adalah untuk mencoba berbagai pemanfaatan kebutuhan air diantaranya air minum, irigasi dan industri mulai dari tahun 2005 sampai 2030. Dari optimasi dengan program linier untuk fungsi tujuan memaksimalkan release dan keuntungan menghasilkan keuntungan untuk tahun 2005 (Rp. 5,341,963,401.29), tahun 2010 (Rp. 5,502,992,697.29), tahun 2020 (Rp. 6,220,765,679.09) dan tahun 2030 (Rp. 7,508,548,171.86). Peningkatan keuntungan tersebut terjadi karena adanya peningkatan kebutuhan air. Hasil perhitungan optimasi dengan program linier didapatkan bahwa Waduk Cimeta hanya mencapai optimum pada tahun 2010 karena release yang dihasilkan belum mampu memenuhi kebutuhan air minum, irigasi dan industri pada tahun 2020 dan 2030. Metode yang digunakan untuk menentukan umur guna Waduk Cimeta adalah metode dengan Trap Effisiency yang tergantung pada perbandingan antar kapasitas tampungan waduk (C) dan inflow (I) tahunan dari waduk yang bersangkutan. Effisiency tangkapan suatu waduk akan berkurang sejalan dengan umurnya, karena kapasitas waduk akan dikurangi oleh tumpukan sedimen. Dengan diketahuinya kapasitas storage (0.7996 x 106 m3) dan inflow sedimen tahunan (0.0777 x 106 m3) maka penentuan umur guna waduk terhadap kapasitas tampungan pada elevasi + 735 dengan berbagai nilai Trap Effisiensi pada beberapa persentase penurunan volume storage (ΔV= 5%, 10%, 20% dan 80%) menunjukkan bahwa umur guna waduk berdasarkan waktu pengisian tampungan oleh sedimen adalah 21.49 tahun dengan ΔV= 5%, 21.337 tahun dengan ΔV=10%, 20.641 tahun dengan ΔV=20% dan 19.038 tahun dengan ΔV=80%. Jadi pada berbagai tahap persentase volume tampungan (ΔV) yang dipakai adalah pada tahap penurunan yang paling besar yaitu ΔV=5% dengan umur guna waduk adalah 21.49 tahunAbstract. Simulation and optimation methods is often used in management of water resources. In this journal, the methods are used to get method exploiting of water resources from accumulating Cimeta reservoir at River of Cimeta - West Java. Method Simulation is used to try various exploiting of amount of water required among others drinking water, irrigation and industrial start from year 2005 until 2030. From optimation method with linear program to target function of maximizing advantage and release yield advantage for year 2005 (Rp. 5,341,963,401.29), year 2010 (Rp. 5,502,992,697.29), year 2020 (Rp. 6,220,765,679.09) and year 2030 (Rp. 7,508,548,171.86). The increasing of benefit is got because there is increasing of water demand. The result of calculation optimation method with linear program is got that Cimeta reservoir is only reach optimum in 2010 because release is produced by Waduk Cimeta is not good enough to meet the demand water for domestic, irrigation and industry in 2020 and 2030. The method is used to determine the useful age of Cimeta reservoir is Trap Efficiency method which depend on comparison between capacity of storage reservoir (C) and inflow (I) annual of the reservoir.Capture efficiency of reservoir will decrease in line with the age, because capacity of reservoir will decreased by sediment filled. As known that capacity of storage (0.7996 x 106 m3) and annual sediment inflow (0.0777 x 106 m3) then determination useful age of reservoir to capacity of storage at elevation + 735 by various value Trap Efficiency at some percentages degradation volume of storage (ΔV= 5%, 10% , 20% dan 80%) indicate that the useful ofage is based on the time of filling storage by sedimen is 21.49 years at ΔV=5%, 21.337 years with ΔV= 10%, 20.641 years with ΔV= 20% and 19.038 years with ΔV=5%. So at various phase of persentage volume storage (ΔV) which is used is the biggest degradation phase that is ΔV= 5% with the useful age of reservoir is 21.49 years.
Kajian Peran Serta Petani Terhadap Penyesuaian Manajemen Irigasi untuk Usaha Tani Padi Metode SRI (System of Rice Intensification) di Petak Tersier Daerah Irigasi Cirasea, Kabupaten Bandung, Jawa Barat Agung Wiyono; Sri Legowo; Joko Nugroho; Christian Adi Nugroho
Jurnal Teknik Sipil Vol 19 No 1 (2012)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2012.19.1.4

Abstract

Abstrak. Budidaya dan penerapan metode SRI (System of Rice Intensification) sifatnya sangat kompleks, dengan adanya teknologi pertanian yang terkait dengan aspek sosial-budaya masyarakat petani dan pengemban kebijakan, lambat laun akan mendorong terjadinya perubahan pada manajemen irigasi. Tujuan dari penelitian ini adalah meneliti seberapa besar pengaruh dari peran serta petani dalam upaya menyesuaikan manajemen irigasi untuk usaha tani padi metoda SRI di daerah irigasi Cirasea, Kabupaten Bandung, Jawa Barat. Dengan responden 88 orang kelompok tani SRI dan 14 orang dari instansi, diperoleh hasil penelitian: variabel kelembagaan (X1), Irigasi(X2), dan Partisipasi Petani dan Sistem Pendukung(X3), secara bersama-sama berpengaruh terhadap Penyesuaian Manajemen Irigasi SRI (Y) nilai korelasi 0,672. (Hubungan kuat), dimana persamaan regresinya adalah Y= 6,957 + 0,239 X1 - 0,327 X2 + 0,604 X3. Partisipasi Petani dan Sistem Pendukung (X3) merupakan faktor dominan yang paling berperan dalam memprediksi tingkat penyesuaian manajemen irigasi SRI dengan nilai koefisien regresi 0,604. Dari sisi institusi didapatkan Pilihan untuk Berpartisipasi (X1), Tekanan Sosial Dalam Bertingkah Laku (X2) dan Kontrol dalam Tingkah Laku (X3) secara bersama-sama berpengaruh terhadap Itensi (Y) dengan nilai korelasi 0,783 (Hubungan kuat), dimana persamaan regresinya adalah Y= 0,854 - 0,286 X1 + 0,558 X2 + 0,693 X3. Variabel Kontrol dalam Tingkah Laku (X3)merupakan faktor dominan yang paling berperan dalam memprediksi variabel Itensi (Y) dengan nilai koefisien regresi0,693.Abstract. Cultivation and application of the SRI (System of Rice Intensification) method are very complex, with the presence of agriculture technology associated with socio-cultural aspects of farming communities and policy holders, eventually leading to changes in irrigation management. The purpose of this study was to test how much the influence of farmers participation in irrigation management efforts to adjust the SRI method of rice farming in irrigated areas Cirasea, Bandung regency, West Java. With 88 respondents from SRI farmer groups and 14 respondents from the agency, they obtained the results of the research: institutional variables (X1), Irrigation (X2), and Farmer Participation and Supports System (X3). They affect SRI Irrigation Management Adjustment (Y)  values correlation of 0.672 (Strong relationship) with the regression equation Y= 6,957 + 0,239 X1 - 0,327 X2 + 0,604. Farmer Participation and Support System (X3) are the most dominant factors play a role in predicting the level of irrigation management SRI adjustments to the value of regression coefficient of 0.604. In the case of agencies found that the Option To Participate (X1), Social Pressure In Practice Acting (X2) and Control of Behavior (X3) jointly affect Itensi (Y) with a 0.783 correlation value (strong ties). With the regression equation Y= 0,854 - 0,286 X1 + 0,558 X2 + 0,693, the unknown variable in the Control of Behavior (X3) is the most dominant factors play a role in predicting Itensi variable (Y) with a regression coefficient value of 0.693.
Analisis Volume Sedimen yang Mengendap Setelah T-Tahun Waduk Beroperasi (Studi Kasus: Waduk Cirata) Welstien Herma Tatipata; Indratmo Soekarno; Arwin Sabar; Sri Legowo
Jurnal Teknik Sipil Vol 22 No 3 (2015)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2015.22.3.7

Abstract

Abstrak. Indonesia mempunyai dua musim dalam satu tahun yaitu musim hujan dan musim kemarau, Agar persediaan air dapat dimanfaatkan secara optimal baik di musim penghujan maupun di musim kemarau, dilakukan sistem pengoperasian waduk, Waduk dapat juga dimanfaatkan untuk pengairan, pembangkit tenaga listrik, pariwisata, pengendali sungai dan banjir, Dalam melestarikan waduk, masalah erosi dan sedimentasi yang akan memenuhinya, dikhawatirkan tidak akan mencapai umur waduk yang direncanakan.Penelitian dilakukan di Waduk Cirata yang berada pada dalam Wilayah Sungai Citarum, Provinsi Jawa Barat yang meliputi sebagian dari tiga wilayah kabupaten yaitu Kabupaten Bandung, Purwakarta dan Cianjur. Metode pengumpulan data meliputi data Primer dan data sekunder yang dikumpulkan dari PT Pembangkitan Jawa Bali Badan Pengelola Waduk Cirata Cirata, Hasil Kesimpulan adalah dengan masuknya sedimentasi ke dalam waduk akan mengakibatkan pengendapan dan pendangkalan yang akan mempengaruhi kapasitas tampung waduk juga semakin lama waduk beroperasi, maka semakin banyak sedimen yang mengendap didalam waduk, perbandingan antara volume sedimen yang mengendap setelah 10 tahun dan setelah 200 tahun adalah 10215287,18 m3 dan 193953499,6 m3, setelah menganalisis volume sedimen yang mengendap setelah T-tahun pada waduk yang beroperasi maka akan dipikirkan rencana umur wadukselanjutnya.Abstract. Indonesia has two seasons of the year: the rainy season and the dry season, So that the water supply can be optimally used both in the rainy season and dry season, made the operating system of reservoirs. Reservoirs can also be used for irrigation, power generation, tourism, controllers rivers and floods, in preserving the reservoir, the problem of erosion and sedimentation will comply, it is feared will not reach the age of the planned reservoir. The study was conducted in Cirata located on the CRB, West Java Province that covers most of the three districts namely Regency Bandung, Purwakarta and Cianjur. Methods of data collection includes data Primary and secondary data collected from PT Generation Java Bali Cirata Cirata Basin Management Board, Results The conclusion is by the entry of sediment into the reservoir will result in sedimentation and silting that would affect the capacities of reservoirs also the longer the dam operates, the more sediment that settles in the reservoir, the ratio between the volume of sediment that settles after 10 years and after 200 years was 10215287,18 m3 and 193953499,6 m3, after analyzing the volume of sediment that settles after T years at the reservoir operating plan will be considered next dam age.
Clarification of Watershed Recharge in Cisadane River Basin through Ground Test Dina P.A Hidayat; Sri Legowo W. D; Mohammad Farid
Journal of the Civil Engineering Forum Vol. 8 No. 2 (May 2022)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (293.73 KB) | DOI: 10.22146/jcef.4015

Abstract

KARDAS is an area used to protect groundwater from its usage as a water source. Meanwhile, the recharge zone is normally determined in Indonesia through the Regulation of the Ministry of Public Works and Housing (Permen PUPR) Number 10/2015 with the focus on certain physical parameters such as soil texture, land use/land cover, annual rainfall, and slope provided with relative potency values from 1 which represents very low to 5 which is very high. This system was used to review four parameters in a small grid unit of 1 km2 each in the Cisadane River Basin with a 1,545.47 km2 area divided into 1,710 units and the most dominant grid placed at the middle part while the rest are at the edge of the basin. This research focused on the clarification methods to determine the potential recharge variables for this river basin in order to serve as a reference for the potential recharge zone in Indonesia. The KARDAS map obtained showed a very high potential with a score of 17-20 covering 183 km2 (10.45%), high potential with a score of 13-16 involving 943 km2 (56.96%), medium potential with 584 km2 (32.59%), and 0 small potential. Moreover, KARDAS desk study results were clarified using the field or ground test to ensure accuracy and this involved using 14 units as samples to represent the five potentials through temporary quantitative cumulative scores. The desk study or secondary data results were found to be only 50% accurate with a limited point survey but the application of qualitative perception showed that only 1 point does not match with the medium and high potentials this indicates the accuracy was 93% which is categorized to be good.
Determination of the Cascade Reservoir Operation for Optimal Firm-Energy Using Genetic Algorithms Azmeri -; Iwan K; Hadihardaja -; Sri Legowo
Aceh International Journal of Science and Technology Vol 2, No 2 (2013): August 2013
Publisher : Graduate Program of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (604.979 KB) | DOI: 10.13170/aijst.2.2.694

Abstract

Abstract - Indonesia today face a new paradigm in water management where aim to apply integrated water resources management has become unavoidable task in purpose of achieving greater level of effectiveness and efficiency. On of most interesting case study is the case of Citarum river, one of the most potential river for water supply in West Java, Indonesia. Alongside the river, Saguling, Cirata and Djuanda Reservoirs had been constructed in series/cascade. Saguling and Cirata reservoirs are particularly operated for hydroelectric power and Djuanda is multipurpose reservoir mainly operated for irrigation and contribute domestic water supply for Jakarta (capital city of Indonesia). Basically all reservoirs are relying on same resources, therefore this condition has considered addressing management and operational problem. Therefore, an approach toward new management and operation system are urgently required in order to achieve the effective and efficient output and to avoid conflicts of water used. This study aims to obtain energy production from Citarum Cascade Reservoir System using Genetic Algorithms optimization with the objective function to maximize firm-energy. Firm-energy is the minimum energy requirements must be available in a certain time period. Then, the result obtained by using the energy produced by GA is compared to the conventional searching technique of Non-Linier Programming (NLP). The GA derived operating curves reveal the higher energy and firm-energy than NLP model. Keywords: Genetic Algorithms, Citarum Cascade Reservoir, Firm-Energy, Electrical Energy
Persepsi Dan Preferensi Tinggal Masyarakat Pada Area Sempadan Sungai (Studi Kasus : Kelurahan Bailang Kota Manado Gabriel Purnama; Sri Legowo Wignyo Darsono; Ana Nugranah Chaidar
Journal on Education Vol 6 No 4 (2024): Journal on Education: Volume 6 Nomor 4 Mei-Agustus 2024
Publisher : Departement of Mathematics Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joe.v6i4.6108

Abstract

People who still live in the area around the river, even after the flood disaster is a matter of concern. The perceptions and preferences of the community are very influential when choosing a place of residence. Basically, these perceptions and preferences are shaped by their knowledge or understanding of the objects that will be perceived, as well as the main reason people choose their current residence, which in this study is the river border area in the Manado City Bailang Kelurahan. The majority of the inhabitants of the river border region that suffered flooding in January 2023 chose to remain in the rivers border area, even though they were aware of the dangers that might arise later on. The aim of this research is to find out the perceptions and preferences of the people who live around the border of the Bailang river so that they can continue to live there. This research uses quantitative methods with descriptive analysis. The conclusion derived from the perceptions and preferences of the population is that they chose to settle in the river boundary area in the Bailang District of the City of Manado, because many local people do not understand about river border areas, the establishment of river borders, the distance of establishing river lines on either river-boundary or non-border river, then does not understand the purpose of the rivers border area and the people hear from others information obtained about rivers boundaries area and some have also heard of socialization from the government. People who choose to stay in the River Border Area because there is no other land for them to build houses and also in the place where they now have cheap land prices.
Assistance in Designing Citarum River Cliff Protection to Control River Erosion in Atirompe Village, Majalaya District, Bandung Regency Rohmat, Faizal Immaddudin Wira; Ledowikj, Felix Joel; Rodiah, Siti; Rohman, Mutiara Indah Nur; Burnama, Nabila Siti; Darsono, Sri Legowo Wignyo; Kuntoro, Arno Adi; Farid, Mohammad; Nugroho, Eka Oktariyanto; Chaidar, Ana Nugranah
Jurnal Pengabdian kepada Masyarakat (Indonesian Journal of Community Engagement) Vol 9, No 4 (2023): Desember
Publisher : Direktorat Pengabdian kepada Masyarakat Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpkm.86817

Abstract

Rivers are often used as a water source for agriculture, transportation, and water supply needs. One of the causes of riverbank damage is scouring the cliff's foot, which cannot withstand scouring currents. If not addressed immediately, it will cause more severe damage. Citarum River is one river that passes through Atirompe Village, Majalaya District. The riverbanks in the area have a risk of cliff failure. The study objective was to analyze the problem, design the protection, and calculate the budget. The hydrology and riverbank analysis of the Majalaya River has been performed. The steps were essential to analyze the depth and width of the scour caused by the flow of the Citarum River water. Sediment data were collected at three locations, namely the upstream, middle, and downstream of the river segment that will be reviewed. In data processing, to obtain a sediment rating curve, it is necessary to measure the flow velocity, which will later be calculated and used as the flow rate during Total Suspended Solid (TSS) data collection. Using the Hydrology Engineering Center – River Analysis System (HEC – RAS) 6.2 software, the calculations with the Ripley Equation were compared to obtain the scour depth. For the design alternative, constructing a steel sheet pile-type cliff protection structure is one form of planning to protect riverbanks. This study also analyzed the recapitulation of the budgeting for protecting the Citarum riverbanks in Atirompe Village, Majalaya District. Using a standardized unit price, the total cost for the protection is 1.8 billion rupiahs.
Penataan Ruang Air Milik Sungai Tallo dalam Rangka Pengendalian Banjir Al-Qadri, M. Yoesril; Wignyo Darsono , Sri Legowo
Jurnal Sosial Teknologi Vol. 4 No. 6 (2024): Jurnal Sosial dan Teknologi
Publisher : CV. Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jurnalsostech.v4i6.1255

Abstract

Kota Makassar sering mengalami banjir di sekitar Sungai Tallo, khususnya pada ruas tengah kota sepanjang 3,2 km. Masalah banjir ini disebabkan oleh tingginya intensitas curah hujan dan faktor manusia yang menyebabkan perubahan karakteristik sungai. Meskipun banjir di Sungai Tallo telah menjadi objek penelitian dari berbagai universitas, belum ada strategi penanganan banjir yang handal karena belum menyentuh akar permasalahan. Penelitian ini bertujuan untuk mengukur dan menganalisis kapasitas Sungai Tallo secara akurat untuk memahami potensi banjir yang terjadi, serta mencari solusi penataan ruang air milik Sungai Tallo yang dapat membantu dalam pengendalian banjir di Kota Makassar. Penelitian ini menggunakan metode deskriptif dengan mengumpulkan data primer dan sekunder. Analisis hidrologi dilakukan untuk menganalisis curah hujan dan analisis hidrolika untuk menganalisis sebaran genangan banjir. Hasil analisis debit menggunakan metode HSS Nakayasu menunjukkan debit banjir periode ulang (Q25) pada daerah penelitian sebesar 552.87 m3/detik, yang menyebabkan kenaikan tinggi muka air 0.8 meter di kawasan sekitar lokasi penelitian. Penentuan garis sempadan sungai dengan lebar 15 meter dari tepi sungai menunjukkan terdapat 21 rumah yang melanggar di daerah kawasan sempadan sungai. Banjir di Sungai Tallo disebabkan oleh curah hujan yang tinggi dan faktor manusia. Penentuan garis sempadan sungai sangat penting untuk menjaga keselamatan sungai. Penelitian ini menyarankan untuk melakukan pengendalian banjir yang lebih efektif dan berkelanjutan, melibatkan masyarakat, serta melakukan koordinasi antara pemerintah daerah, masyarakat, dan instansi terkait.
Dinamika Perubahan Dasar dan Tebing Sungai Jambu: Studi Kasus pada Sekitar Jembatan Cikuya Aulia, Humam; Nugroho, Eka; Legowo, Sri; Kusmulyono, Agus Suprapto
JURNAL TEKNIK HIDRAULIK Vol 15, No 1 (2024): Jurnal Teknik Hidraulik
Publisher : Direktorat Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v15i1.732

Abstract

Several cross-sections of the Jambu River, particularly around the Cikuya Bridge, have experienced bank collapse phenomena. This paper interprets the issues related to bank collapse and its impact on the flow capacity of the Jambu River, especially around the Cikuya Bridge. Morphological changes were simulated using a sediment transport model implemented in the Hydrologic Engineering Center's River Analysis System (HEC-RAS) 6.3.1, integrated with the ARS-USDA Bank Stability and Toe Erosion Model (BSTEM). The simulation results indicate that over a period of 10 years, the thalweg elevation (the lowest point of a riverbed)  of the Jambu River around the Cikuya Bridge is predicted to experience deposition in 17 cross-sections and erosion in 15 cross-sections. The highest deposition occurs at the cross-section below the Cikuya Bridge, with a thalweg elevation change of 0.59 m. This warrants attention as the storage capacity of the cross-section decreases by 7% from the initial condition. Predictions indicate that bank collapse will occur in 7 cross-sections over the next 10 years. This is attributed to the steep slopes of silt and clay banks, exceeding 45 degrees, and the reduced safety factor of bank stability due to groundwater pressure influenced by river discharge fluctuations and tidal effects reaching the Jambu River. Bank collapse impacts the elevation change of the riverbed and adds load to the sediment transport model from the collapsing cross-sections to the downstream sections. Keywords:  Jambu River, Cikuya Bridge, Cilacap, sediment transport, bank stability and toe erosion model
Co-Authors . Azmeri, . Agung Wiyono Agung Wiyono Al-Qadri, M. Yoesril Ana Nugranah Chaidar Arno Adi Kuntoro Arwin Sabar Aulia, Humam Burnama, Nabila Siti Chaidar, Ana Nugranah Christian Adi Nugroho Christian Adi Nugroho, Christian Adi Dina P.A Hidayat Eka Oktariyanto Nugroho Faizal Immaddudin Wira Rohmat Gabriel Purnama Hadihardaja - Hang Tuah Hang Tuah, Hang Indratmo Soekarno Indratmo Soekarno Indratmo Soekarno Iwan K Iwan K. Hadihardaja Iwan K. Hadihardaja Iwan Kridasantausa Iwan Kridasantausa Hadihardaja Iwan Kridasantausa Hadihardaja Iwan Kridasantausa Hadihardaja Iwan Kridasantausa, Iwan JOKO NUGROHO Joko Nugroho Kusmulyono, Agus Suprapto Ledowikj, Felix Joel Mohammad Farid Nugroho, Eka Rohman, Mutiara Indah Nur siti rodiah Soekarno, Indratmo Suardi Natasaputra Suardi Natasaputra, Suardi Susi Rabuanawati Susi Rabuanawati, Susi Tatipata, Welstien Herma Wanny K Adidarma Wanny K Adidarma, Wanny K Welstien Herma Tatipata