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Pemberdayaan Sumber Daya Air untuk Berbagai Kepentingan Secara Berkelanjutan Sangkawati, Sri; Hadihardaja, Joetata
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 13, Nomor 3, Edisi XXXIII, OKTOBER 2005
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (431.004 KB) | DOI: 10.14710/mkts.v13i3.3927

Abstract

Water is essential for human life, for agricultural, industrial production and for water-based recreation and transportation. It is central to many national concern, including energy, food production, environmental quality, and regional economic development. Water as a public comodity which is not have valuable value, this condition will encourage the over consumpsion of the water. In the future, the management of water resources in Indonesia will be more difficult. The water demand will be increased as result population growth, in other hand the water resources will be more rare. The limitation of water supply will be a cause of conflict among community. In accordance of the water resource utilization, which is more and more limited, the water resources should be optimize and integrated and sustained. Privatitation of water resources is not againt the UUD 1945. As long as, the water that  will be offer to other community  as a result of  water surplus of an area. Beside that, it should be improve the welfare of the community Keywords: Sumberdaya air, pengelolaan, pemberdayaan berkelanjutanPermalink: http://www.ejournal.undip.ac.id/index.php/mkts/article/view/3927[How to cite: Sangkawati, S. dan Hadihardaja, J., 2005, Pemberdayaan Sumber Daya Air untuk Berbagai Kepentingan Secara Berkelanjutan, Jurnal Media Komunikasi Teknik Sipil, Volume 13, Nomor 3, pp. 117-127]
Uji Kemampuan Bangunan Pengaman Mengurangi Longsoran pada Balas Rel akibat Banjir Atmojo, Pranoto Samto; Sachro, Sri Sangkawati; Budieny, Hary
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 19, Nomor 1 (2013)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (689.262 KB) | DOI: 10.14710/mkts.v19i1.7835

Abstract

Ballast rail has a vital fuction to support the train’s load and its dynamic forces. This load is then distributed to the subgrade layer through pile of gravel under the ballast. Most of the design about the gravel layer (ballast) doesn’t take into account the effect of flood overflow on the rail, which is very likely to occur during rainy season. The Flood flows above the rail will reduce the ballast stability and then eroded. Part or most of the gravel were flushed out, thus resulting the ballast to be weak and may collapse, which is vey dangerous to the train traffic. Its therefore requires to investigate stability of the ballast under flood flow above the rail condition and any measure or improvement required by Hydraulic Modeling. The research is conducted at Hydraulic Laboratory, Diponegoro University. The model prototype is refer a tract rail at Mangkang-Semarang KM.12, with scale of 1:5. Its shown that the ballast  without a safety structure will start to scour when water level h1 = 15 cm , meanwhile with the structures Type 1 and Type 1 + 1 its start scour h1 = 17 and 19 cm respectively. The safety structure is able to scouring decrease , ie at the variation of h1 = 19 cm , there are 68.50 cm without structure, and with structure Type 1 and Type 2 are  29 and  26 cm respectively. This research shown that it needs to installing safety structure (sill) to reduce the danger cause of flood flow over the rail, especially at the flood prone area. The Management of train traffic could adopt this result how to protect of ballast scour cause of flood.
PERENCANAAN CHECK DAM GALEH KABUPATEN TEMANGGUNG Nugroho, Andin Cipto; Mudhofar, Hasan; Sangkawati, Sri; Kurniani, Dwi
Jurnal Karya Teknik Sipil Volume 4, Nomor 4, Tahun 2015
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (483.17 KB)

Abstract

Galeh river is one of rivers which are on the slopes sindoro ( 3153 mdpl ). Galeh river in length a major river more or less 18,3 km with broad das 41,05 km². The distance landscapes of the river galeh is ± 35 m, and slope the river that is 12,35 %. With a baseline a river that relatively precipitous, so the flow of high speed would be easy gradually crushed, especially on the basis, the river wall, who has resulted in the erosion and sedimentation. To reduce the potential this danger, attempts to prevention of building construction control sediment (Check Dam). From the data hydrology in the form of rainfall daily, DAS map, topographical maps and map geometry the discharge flood get the target 283,044 m3/seconds. Data hydrological and reference is to be cultivated as the basis for planning main dam, sub dam, apron, and support buildings other, obtained the results of the total in the form of high Main Dam 3,55 meters as much as, high total Sub Dam 2.2 meters, long an apron of about 20 m and volume tampungan 5.478,27 m³ as much as, with a total cost amounting to Rp 2.362.300.000,-. Check Dam development will be more optimal if accompanied by a system of the observance of which either by other relevant offices prosentase it is expected that the affected areas the flow of sedimentation can be reduced significantly..
Pemodelan Keruntuhan Bendungan Menggunakan HEC-RAS 2D Studi Kasus Bendungan Gondang, Kabupaten Karanganyar Murdiani, Kiki Marina; Sangkawati, Sri; Sadono, Kresno Wikan
Rekayasa Vol 13, No 2: August 2020
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (11791.288 KB) | DOI: 10.21107/rekayasa.v13i2.6872

Abstract

Pembangunan bendungan memberikan manfaat untuk masyarakat sekitar waduk, namun juga menyimpan bahaya jika mengalami keruntuhan bendungan. Salah satu syarat yang harus dipenuhi sebelum mendapatkan sertifikat ijin operasi adalah RTD (Rencana Tindak Darurat). Manfaat dari disusunnya rencana tindak darurat adalah untuk pedoman para pengelola bendungan maupun pemerintah yang berada pada daerah yang terkena resiko apabila terjadi kondisi darurat pada Bendungan. Makalah ini mencakup daerah yang terdampak jika terjadi kegagalan bendungan. Pemanfaatan Software menggunakan HEC-RAS dengan studi kasus Bendungan Gondang yang berlokasi di Kabupaten Karanganyar. Lokasi terdampak menurut hasil analisis adalah Desa Gempolan, Desa Ganten, Desa Kwadungan, Desa Kutho, Kecamatan Kerjo, Kabupaten Karanganyar, Provinsi Jawa Tengah. Bendungan ini mempunyai tampungan total 9,15 juta meter kubik dengan tinggi bendungan 71 meter.  Pemodelan keruntuhan bendungan dengan 2D pada kondisi unsteady flow, simulasi keruntuhan akibat piping tengah pada elevasi +495 m. Hasil pemodelan keruntuhan Bendungan Gondang yang akan menimbulkan dampak paling besar jika terjadi piping tengah akibat banjir PMF dengan puncak debit Qoutflow= 902,40m3/det. Kecepatan banjir akibat keruntuhan bendungan tercepat yang sampai ke pemukiman adalah 24 menit yaitu sampai di Desa Gempolan yang berjarak 0,6 km dari lokasi bendungan.AbstractThe construction of a dam provides benefits to the community around the reservoir, but also saves danger if it experiences dam collapse. One of the requirements that must be met before obtaining an operating permit certificate is the RTD (Emergency Action Plan). The benefit of formulating an emergency action plan is to guide the dam managers and the government who are in the area at risk if an emergency condition occurs at the Dam. This paper covers the area affected in the event of dam failure. Utilization of Software uses HEC-RAS with a Gondang Dam case study located in Karanganyar Regency. The affected locations, according to the results of the analysis are Gempolan Village, Ganten Village, Kwadungan Village, Kutho Village, Kerjo District, Karanganyar Regency, Central Java Province. This Dam has a total reservoir of 9.15 million cubic meters with a dam height of 71 meters. Dam failure modeling with 2D under unsteady flow conditions, simulation of collapse due to middle piping at +495 m elevation. The results of the Gondang Dam collapse modeling, which will have the most significant impact if there is middle piping due to PMF flooding with peak discharge Qoutflow = 902.40m3 / sec. The speed of flooding due to the collapse of the Dam that reached the fastest settlement was 24 minutes, namely to the village of Gempolan, which is 0.6 km from the location of the Dam.Keywords: Gondang Dam, dam break, affected area Karanganyar.
KAJIAN DISTRIBUSI SEDIMENTASI TERHADAP UMUR RENCANA WADUK CIAWI DI KABUPATEN BOGOR Siwu, Wulandari Pingkan; Sangkawati, Sri; Sriyana, Ignatius
Rang Teknik Journal Vol 4, No 2 (2021): Vol. 4 No. 2 Juni 2021
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (499.045 KB) | DOI: 10.31869/rtj.v4i2.2321

Abstract

Waduk Ciawi terletak di bagian hulu sungai Ciliwung di Desa Cipayung Kecamatan Megamendung Kabupaten Bogor Provinsi Jawa Barat. Waduk Ciawi merupakan waduk eka guna (single purpose) yang dibangun untuk pengendalian debit puncak banjir maksimum di hulu Sungai Ciliwung dengan konsep dry dam. Perencanaan suatu bendungan tentunya tidak akan pernah terlepas dari rencana usia waduk, dalam perencanaannya selalu memperhitungkan jumlah sedimen yang akan masuk ke dalam waduk selama usia guna waduk karena pengendapan sedimen di dead storing dapat berdampak pada usia guna waduk, sehingga perlu dilakukan analisis untuk memprediksi besarnya sedimentasi dan pola distribusi sedimen pada Waduk Ciawi dalam upaya optimalisasi pengelolaan waduk. Memprediksi besarnya sedimentasi di Waduk Ciawi dilakukan berdasarkan pengaruh sedimen layang dan analisis distribusi sedimen menggunakan Metode Empiris Pengurangan Luas (Empirical Area Reduction Method). Berdasarkan hasil analisis, jumlah sedimen yang mengendap di Waduk Ciawi sepanjang umur rencana adalah sebesar 206.687,60 m3, dengan elevasi nol baru (new zero elevation) waduk setelah tahun ke 50 yaitu pada +512 m dan kapasitas tampungan efektif yang terisa sampai dengan umur efektif tercapai (T50) sebesar 6.178.131 m3. Secara teoritis Waduk Ciawi masih bisa berfungsi dengan baik sampai dengan umur rencana terlampaui.
Analisa Potensi Aliran Lahar Kali Putih, Gunungapi Kelud Hayu Rahayu; Suharyanto Suharyanto; Sri Sangkawati
Borneo Engineering : Jurnal Teknik Sipil Volume 4 Nomor 2 Tahun 2020
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v4i2.1401

Abstract

Kelud Volcano is one of the active volcanoes and located in East Java. After the eruption, Kelud Volcano left a number of volcanic materials from the rock, sand and the ash on residential land, plantations and the surrounding area. The main problem is the eruption of Kelud Volcanoes has the potential to experience an increase in the frequency of eruptions and there has been no development of a regional reconstruction model for secondary impacts due to eruptions in the field of water resources infrastructure. Based on these problems, a test of the Sabo and modular hydraulic physical models will be planned. This study discusses the identification of the location and volume of sediments that have the potential to become Kali Putih lava flows from Kelud Volcanoes. The Takahashi analysis method is used to analyze the estimated excess volume of the target sediment which must be controlled by sabo technology. Identification of sediment transport zones is obtained from the classification of slope on existing buildings obtained from satellite imagery. The results of the analysis are as follows: 1.) Sediment transport areas in the Putih Watershed have an area of 863 km2. 2.) The total volume of Kali Putih sediment that has the potential to become cold lava after the eruption is 4,139,414.23 m3. 3.) Sabo and modular hydraulic physical model testing is required. 4) A model of regional reconstruction is needed for secondary impacts due to eruptions in the water resources field. 5) New sabo plan planning is needed
Hubungan Antara Elevasi Muka Air Waduk Dan Panjang Lintasan Rembesan Terhadap Debit Rembesan Pada Bendungan Urugan Batu Inti Tegak (Studi Kasus Bendungan Jatibarang) Siswanto Siswanto; Suprapto Suprapto; Sri Sangkawati Sachro
JURNAL TEKNIK HIDRAULIK Vol 10, No 2 (2019): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v10i2.628

Abstract

Rockfill dams have better stability than homogeneous soil dams. It allows to design the dam more slim with a higher slope. The disadvantage of rockfill dam is in the core zone as an impermeable zone. Zoned vertical core rockfill dam is a combination of various material properties. Geometry and drainage design will affect the seepage and phreatic line properties that occur. Numerical modeling and calculations are used to calculate the seepage profile more accurately. The combination of the parameters of the permeability coefficient (K), reservoir water level (Δh) and the length of the seepage path (L) can be used to determine the relationship between parameters with the same unit. 2D modeling take into account saturated/unsaturated conditions with steady state on each parameter. This study uses the Jatibarang-Indonesia dam as a basic model. The seepage profile at condition K1 (k = 1x10-5cm/sec) is q/k = -0.0018 (h2/L)2 + 1.3496h2/L + 53.241 and the seepage profile K2 (k=1x10-7cm/s) is q/k = -0.1521 (h2/L)2 + 90.402h2/L + 5480.2. This equations can be used to estimate seepage that occurs in a dam of other rock fill zoned vertical core dam based on the permeability coefficient value (K) more practically for all values of Δh and L reviewed.Keywords: Seepage, Rockfill Dam, Permeability, FEM, Numerical Analysis
Studi Pendapat Publik dalam Penganggaran Operasi, Pemeliharaan dan Manajemen Sumber Daya Air Sri Sangkawati Sachro
Jurnal Teknik Sipil Vol 21 No 2 (2014)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2014.21.2.4

Abstract

Abstrak. Hubungan antara anggaran Operasi, Pemeliharaan dan Manajemen (OP&M) dengan kemampuan system sumber daya air untuk mencapai kinerja yang tinggi sudah menjadi perhatian dalam pengelolaan sumber daya air. Pada saat ada keterbatasan dana, maka akan mengakibatkan satu atau beberapa kegiatan tidak dapat dikerjakan, dan pengelola harus memilih prioritas kegiatan OP&M. Pengelola mempunyai pertimbangan masing-masing di dalam menentukan prioritas kegiatan tersebut. Salah satu sumber dana untuk pengelolaan sumber daya air adalah biaya jasa pengelolaan sumber daya air (BJP-SDA), yaitu biaya kontribusi dari para penerima manfaat, sehingga diperlukan identifikasi penerima manfaat dan faktor-faktor pengaruh kecukupan dana OP&M. Identifikasi dilakukan melalui pendapat publik yaitu penilaian obyektif dari pakar pengelolaan sumber daya air melalui kuesener.Kuesioner ini menyoroti dan menyelidikai rincian biaya OP&M, prioritas kegiatan dan biaya jasa pengelolaan sumber daya air. Berdasarkan identifikasi terhadap penerima manfaat yang diharapkan ikut menanggung biaya pengelolaan sumber daya air dapat disimpulkan bahwa: pihak-pihak yang berkepentingan dalam pengelolaan sumber daya air sudah memahami bahwa biaya menjadi tanggung jawab bersama.Abstract. The relation between Operation, Maintanance and Management OM&M funding and the ability of water resources system to achieve high performance became attention in water-resources management. When there is fund limitation, one or some activities can not be conducted, and organizer must selects activity priority of OM&M. Every organizer have consideration by it self in determining activity priority. One of the fund sources for the water resources management is the service cost of water resources management, that is contribution expense from beneficiaries, then identification of beneficiaries and influence factors to fund sufficiency OM&M are needed. Identification through public opinion, that is objective assessment of water resource management expert by giving questionnaires. This questionnaires was to highlight and investigate the breakdown of OM&M expenditure, expenditure priorities, service charge. Base on the identification toward beneficaries who are expected to cover the water resources management cost, it can be summarized that other parties who have an interest in water resources management have already understood that the cost is a collective responsibility.
Penggunaan Analisis Dimensi untuk Mencari Korelasi Antar Variabel pada Uji Model Hidrolik Pranoto Samto Atmojo; Sri Sangkawati Sachro; Hary Budieny
Jurnal Teknik Sipil Vol 21 No 3 (2014)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2014.21.3.5

Abstract

Abstrak. Dalam penelitian pemodelan, perumusan korelasi antara satu variabel dengan kelompok variabel lain dapat diselesaikan dengan analisis dimensi atau statistik. Analisis dimensi dalam hal tertentu akan lebih mudah dan relatif cepat untuk mengetahui hasilnya. Ada beberapa metode analisis dimensi yang sering digunakan, antara lain Metode Buckingham, Indicial, dan matrix. Tulisan berikut akan menggunakan analisis dimensi metoda Buckingham's untuk menentukan korelasi konsentrasi sedimen yang tergerus (C) dan kelompok variabel lain (Hw, g, ρw, Qw, Hs, ds, ρs , v) pada model penggelontoran sedimen. Berikutnya akan dapat diketahui korelasi konsentrasi sedimen maksimum hasil penggelontoran terhadap tinggi muka air hulu pada setiap tebal sedimen (d) yang telah mengendap.Pemodelan dengan skala 1:66,67, menggunakan sedimen tiruan serbuk batubara. Tebal sedimen yang mengendap diasumsikan 1,5; 2,25; 3,00; 3,75; 4,50 cm. Pengukuran konsentrasi yang tergelontor pada saat setiap muka air turun 1,50 cm dari tinggi muka air awal 13,90 cm. Hasil analisis didapat korelasi: C / ρ s = ƒ( Qw.v / H3 w . ɡ), dan konsentrasi sedimen maksimum hasil penggelontoran setiap tebal endapan didapat pada ketinggian muka air : Hw = 10,58 Hs-0,12HwAbstract. In the modeling research, the correlation formulation between one variable to a group of other variables can be solved by dimensional analysis or statistics. Dimensional analysis would be easy and relatively quick to obtain results in the certain cases. There are several methods of analysis dimensions that are often used, among other methods are Buckingham's, Indicial, and matrix. The following article will use the dimensional analysis Buckingham's method to determine the correlation of flushed sediment concentration (C) and a group of other variables (HW , g , ρw , QW , Hs , ds , ρs , v) in the flushed sediment modeling. The next step its will be known correlation maximum concentration of sediment flushed results against upstream water level at each sediment thickness (d) which has been deposited. Modeling scale of 1 : 66.67, use sediment artificial with coal dust. The thickness of sediment that settles at the assumed 1.5 ; 2.25 ; 3.00 ; 3.75 ; 4.50 cm. The flushed sediment concentration measurements were conducted during the upstream water level every drop of 1.50 cm, from the initial water level 13.90 cm. The results of the analysis correlation can be obtained : C / ρ s = ƒ( Qw.v / H3 w . ɡ), and the maximum concentration of flushed every sediment thickness can be obtained at water level : Hw = 10,58 Hs-0,12Hw
PERENCANAAN PROGRAM ALOKASI AIR STUDI KASUS DAS LAMAKMEN KABUPATEN BELU NUSA TENGGARA TIMUR Fitria Sofi Choirunisa; Yulia Ananda Putri; Sri Sangkawati; Sutarto Edhisono
Jurnal Karya Teknik Sipil Volume 7, Nomor 3, Tahun 2018
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

ABSTRAK Perencanaan Program Alokasi Air (PAA) bertujuan untuk pengelolaan distribusi air irigasi dan air baku di dalam satu wilayah daerah aliran sungai (DAS). Program alokasi air dibuat sesederhana mungkin dan user-friendly sehingga pengguna mudah memahami dan mengoperasikannya. Desain perangkat lunak menggunakan Web Server (XAMPP). Hasil dari perencanaan program alokasi air adalah neraca air, dari perhitungan neraca air tersebut kemudian dapat dilakukan perencanaan bangunan terpilih. Hasil perhitungan menggunakan manual (dengan Ms. Excel) dan menggunakan program mirip.Daerah aliran sungai yang menjadi bahan studi kasus adalah DAS Lamakmen, terletak di Sungai Mota Malibaka, Kabupaten Belu, Nusa Tenggara Timur. Daerah aliran sungai memiliki 2 (dua) daerah irigasi (DI) yaitu DI Holeki dan DI Halileki. Di dalam perencanaan program digunakan metodologi yaitu metode FJ Mock untuk perhitungan ketersediaan air dan metode Penman untuk perhitungan evapotranspirasi. Data-data sekunder yang digunakan dalam perencanaan program adalah peta topografi, data hidrologi, data meteorologi-hidrologi, dan data daerah irigasi yang akan diairi. Berdasarkan hasil analisa menggunakan Program Alokasi Air ini didapatkan ketersediaan air rata-rata 4.491,47 liter/detik, kebutuhan air rata-rata 1.210,48 liter/detik sehingga  neraca air rata-rata DAS Lamakmen adalah 3.280,99 liter/detik dan kekurangan air sebesar 23.865.079,76 liter/detik.