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RIVER CLIFF REINFORCEMENT EFFORTS BY APPLICATION OF COMBINATION OF DAM STONE, GABION, TETRAPOD, AND BAMBOO FLOW ALIGNER Wibowo, Dian Eksana; Purwantoro, Didik; Nayono, Satoto Endar; Wardhana, Indra Bayu; Prabowo, Yoga Bayu
Journal of Green Science and Technology Vol 4, No 1 (2020): Journal of Green Science and Technology, Vol.4 No.1 (2020)
Publisher : FAKULTAS TEKNNIK UNIVERSITAS SWADAYA GUNUNG JATI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v4i1.3152

The purpose of research : (1) determine the ratio between the combination of retrofitting tetrapod-bamboo alignment-tetrapod (FP1); bamboo flow aligner-tetrapod-bamboo flow aligner (FP2); Check Dam Stones-Gabion-Check Dam Stones (FP3); Gabion-Check Dam Stones-Gabion (FP4)? (2) The effectiveness of the combination of strengthening the tetrapod-bamboo aligner-tetrapod (FP1); bamboo flow aligner-tetrapod-bamboo flow aligner (FP2); Check Dam Stones-Gabion-Check Dam Stones (FP3); Gabion-Check Dam Stones-Gabion (FP4)?Using the experimental method by creating a Labolatorium scale river model. Testing using clay and sand. The test model is a cliff without reinforcement and cliff with a combination of reinforcement between tetrapods; bamboo flow aligner; check Dam stones and Gabions. Testing by flowing water for 180 minutes/3 hours with a constant discharge of 7.07 liters/second, the installation of reinforcement is 51 cm apart.The results showed that (1) In general, the effect of the FP1 reinforcement installation was the variation of the combination that was considered the best in reducing scouring on the cliffs and riverbeds. (2) Variation of the combination of FP1, is more effective in reducing the scouring that occurs. At the beginning of the channel turns from STA 00-06 effectively used tetrapod installation, with scours that occur as big as -5 cm, in the middle of the STA channel 06-16 effectively using the installation of bamboo flow aligner, scours that occur as much as -1.5 cm, whereas at At the end of the turn, STA 17-24 used tetrapod installation, scouring by -3.8cm.Keyword: scouring, bamboo flow aligner, tetrapod.

Simulasi Model Matematik Difraksi Gelombang dengan Metode Elemen Hingga Didik Purwantoro
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 3, No 2 (2007): Agustus
Publisher : Universitas Negeri Yogyakarta

This paper presents results of research in mathematical model for solving mild slope equation using finite element method. In this method the model in differential equation is approximated with Galerkin smethod and then the equation formed is solved with job iteration.. The equation of refraction and diffraction can be formulated as Mild Slope equation which is assumed that the depth is constant. The result of his research indicates that mathematical model using finite element method give a good perfomance.

Pengaruh Penempatan Tirai Segitiga Lurus dan Segitiga Lengkung terhadap Kedalaman Gerusan Lokal Muchtar Agus Tri Windarta; Didik Purwantoro
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 12, No 2 (2016): Desember
Publisher : Universitas Negeri Yogyakarta

ABSTRACT Pier is part of the bridge which is the most important because it serves to hold the weight of bridge and the weight of the charge passing through it. Then development on the pier of the bridge particularly on stability against local scouring due to the influence of the flow of river water to note. This test aims to find out the influence of variations in the placement of the curtains triangle straight and curved triangle. This study using models pier observation as a means of testing with parameters of depth of flow and discharge of water, with a height of 10 cm, the sand discharge flow 1.09 l/sec. The test Objects this uses pipe PVC with a diameter of 2,6 cm high pier, 25 cm as the pier for testing. Testing it uses a standard tilting flume. Testing done twice with the variation form of the curtain striangle straight and curved triangle. Based on the results of testing conclusion can be obtained that depth of scouring at point A on the pier using a variation of the curtain triangle straight can reduce the scouring of 70% while in the triangular curve blinds reduce scouring amounted to 66%, the depth of scouring in point B and D on the pier using a variation of the curtain triangle straight can reduce the scouring amounting to 72% while in the triangular arch blinds reduce the scouring amounting to 51%, and depth of scouring in point C on the pier using a variation of the triangle straight curtain can reduce scouring of 88% while in the triangle blinds arch reduce the scouring of 66%. Keywords: depth of scouring, variety of curtains. ABSTRAK Pilar merupakan bagian dari jembatan yang paling penting karena berfungsi untuk menahan berat badan jembatan itu sendiri dan berat muatan yang melintasinya. Maka pembangunan pada pilar jembatan terutama pada kestabilan terhadap gerusan lokal akibat pengaruh aliran air sungai perlu diperhatikan. Pengujian ini bertujuan untuk mengetahui pengaruh variasi penempatan tirai segitiga lurus dan segitiga lengkung. Kajian ini menggunakan model pilar sebagai alat pengamatan pengujian dengan parameter kedalaman aliran dan debit air sama, dengan ketinggian pasir 10 cm, debit aliran 0.99 lt/det. Benda uji ini menggunakan pipa PVC dengan diameter 2,6 cm, tinggi pilar 25 cm sebagai model pilar untuk pengujian. Pengujian ini menggunakan standard tilting flume. Pengujian dilakukan dua kali dengan variasi bentuk tirai segitiga lurus dan segitiga lengkung.Berdasarkan hasil pengujian dapat diperoleh kesimpulan bahwa kedalaman gerusan di titik A pada pilar yang menggunakan variasi tirai segitiga lurus dapat mengurangi gerusan sebesar 70% sedangkan pada tirai segitiga lengkung mengurangi gerusan sebesar 66%, kedalaman gerusan di titik B dan D pada pilar yang menggunakan variasi tirai segitiga lurus dapat mengurangi gerusan sebesar 72% sedangkan pada tirai segitiga lengkung mengurangi gerusan sebesar 51%, dan kedalaman gerusan di titik C pada pilar yang menggunakan variasi tirai segitiga lurus dapat mengurangi gerusan sebesar 88% sedangkan pada tirai segitiga lengkung mengurangi gerusan sebesar 66%.Kata kunci: kedalaman gerusan, variasi tirai.

DIFRAKSI GELOMBANG PADA SILINDER 8ESAR DENGAN MILD SLOPE EQUATION Didik Purwantoro
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 2, No 2 (2006): September
Publisher : Universitas Negeri Yogyakarta

ABSTRACTThis research is aimed to know the process of wave diffractionaround the large cylinder of offshore structure using finite elementmethod. This model chosen because of some reasons, i.e thecomplication of offshore structure's shape which are caused difficultiesto conduct physical model solving. The other excess of this numericalmodel is cheaper and easier than physical model conducted in thelaboratorium.The equation of wave diffraction can be formulated as Helmholtzequation. A second approach can be developed by Mild Slope Equation,which is assumed that the depth is constant. The Helmholtz equationwas done using finite element method with linear triangle interpolation.With finite element method, the complicated domain area can be solvedmore easily and effectively.The result shows that the use of finite element method is stilladequate to solve Helmholtz equation' for period 8, 9 and 10 second.For period of 8 second numerical error produce the wave heightdifference of 0,36 m. The numerical model is then easily edited toanalyze another offshore structures.Keywords: diffraction, cyllinder, finite element

MODEL MATEMATIK ANGKUTAN LIMBAH PADA SALURAN TERBUKA Didik Purwantoro
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 2, No 1 (2006): Maret
Publisher : Universitas Negeri Yogyakarta

This research is aimed to know the process of waste transportation on theopen-channel using numerical model. This model is chosen because of some reasons, for example the complication of the river tissue, the influence of ebb which causes difficulty to conduct analytical problem solving. The other excess of this numerical model is cheaper and easier than conducting measurement of waste rate in the field.The equa~on of waste transportation can be formulated as the two physics phenomenon, Le. advection and diffusion process or long dispersion of river. In the solving of equation of waste transportation, each of the components was analyzed separately. The advection part was done first, and the diffusion part was finished then. The advection equation was done using Lagrange interpolation, and the diffusion equation was done using differential method to explicit scheme.The result of the research shows that the use of Lagrange interpolation upto order 4 is still be good enough to finish advection equation for numberCourant 1, 0,75 and 0,5. For number Courant 0.25, numerical mistake causingconcentration degradation of 2.3 0/0. In the diffusion equation, the result of computationusing differential method up to explicit scheme yielding degradation ofwaste concentration from 10 gr/I become 4,96 gr/I for the diffusion coefficient ofKx =10 m2/sc and become 3,73 gr/I for the diffusion coefficient of Kx = 20 m2/sc.

MODEL PENGENDALIAN GERUSAN DI SEKITAR ABUTMEN DENGAN PEMASANGAN GROUNDSILL DAN ABUTMEN BERSAYAP Didik Purwantoro
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 11, No 1 (2015): Mei
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v11i1.9950

ABSTRACTThe main aim of this research is to get a control of scouring around the abutmen of bridge. Scouraround the abutments must be controlled because it is the main damage cause of abutments andthe hydraulic structures built in the river bed. This research was carried out using expermentalmethod by standart teaching flume and steady-uniform flow in Hydraulic Laboratory CivilDepartment Yogyakarta State University.. The research is done in clear-water-Scour The abutmentmodel were spillthrough type, wing-wall type, triangular type and semi circular type.The researchresult shows that the good performance of maximum scour depth around the abutment ocurred atwingwall abutment for 4b lenght is equal to 11 cm.Keywords : Scouring, Groundsill, Wingwall abutment

RIVER CLIFF REINFORCEMENT EFFORTS BY APPLICATION OF COMBINATION OF DAM STONE, GABION, TETRAPOD, AND BAMBOO FLOW ALIGNER Dian Eksana Wibowo; Didik Purwantoro; Satoto Endar Nayono; Indra Bayu Wardhana; Yoga Bayu Prabowo
Journal of Green Science and Technology Vol 4, No 1 (2020): Journal of Green Science and Technology, Vol.4 No.1 (2020)
Publisher : FAKULTAS TEKNNIK UNIVERSITAS SWADAYA GUNUNG JATI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v4i1.3152

The purpose of research : (1) determine the ratio between the combination of retrofitting tetrapod-bamboo alignment-tetrapod (FP1); bamboo flow aligner-tetrapod-bamboo flow aligner (FP2); Check Dam Stones-Gabion-Check Dam Stones (FP3); Gabion-Check Dam Stones-Gabion (FP4)? (2) The effectiveness of the combination of strengthening the tetrapod-bamboo aligner-tetrapod (FP1); bamboo flow aligner-tetrapod-bamboo flow aligner (FP2); Check Dam Stones-Gabion-Check Dam Stones (FP3); Gabion-Check Dam Stones-Gabion (FP4)?Using the experimental method by creating a Labolatorium scale river model. Testing using clay and sand. The test model is a cliff without reinforcement and cliff with a combination of reinforcement between tetrapods; bamboo flow aligner; check Dam stones and Gabions. Testing by flowing water for 180 minutes/3 hours with a constant discharge of 7.07 liters/second, the installation of reinforcement is 51 cm apart.The results showed that (1) In general, the effect of the FP1 reinforcement installation was the variation of the combination that was considered the best in reducing scouring on the cliffs and riverbeds. (2) Variation of the combination of FP1, is more effective in reducing the scouring that occurs. At the beginning of the channel turns from STA 00-06 effectively used tetrapod installation, with scours that occur as big as -5 cm, in the middle of the STA channel 06-16 effectively using the installation of bamboo flow aligner, scours that occur as much as -1.5 cm, whereas at At the end of the turn, STA 17-24 used tetrapod installation, scouring by -3.8cm.Keyword: scouring, bamboo flow aligner, tetrapod.

RIVER CLIFF REINFORCEMENT EFFORTS BY APPLICATION OF COMBINATION OF DAM STONE, GABION, TETRAPOD, AND BAMBOO FLOW ALIGNER Dian Eksana Wibowo; Didik Purwantoro; Satoto Endar Nayono; Indra Bayu Wardhana; Yoga Bayu Prabowo
Journal of Green Science and Technology Vol 4 No 1 (2020): Journal of Green Science and Technology, Vol.4 No.1 (2020)
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v4i1.3152

The purpose of research : (1) determine the ratio between the combination of retrofitting tetrapod-bamboo alignment-tetrapodÂ Â (FP1); bamboo flow aligner-tetrapod-bamboo flow aligner (FP2); Check Dam Stones-Gabion-Check Dam Stones (FP3); Gabion-Check Dam Stones-Gabion (FP4)? (2) The effectiveness of the combination of strengthening the tetrapod-bamboo aligner-tetrapodÂ Â (FP1); bamboo flow aligner-tetrapod-bamboo flow aligner (FP2); Check Dam Stones-Gabion-Check Dam Stones (FP3); Gabion-Check Dam Stones-Gabion (FP4)?Using the experimental method by creating a Labolatorium scale river model. Testing using clay and sand. The test model is a cliff without reinforcement and cliff with a combination of reinforcement between tetrapods; bamboo flow aligner; check Dam stones and Gabions. Testing by flowing water for 180 minutes/3 hours with a constant discharge of 7.07 liters/second, the installation of reinforcement is 51 cm apart.The results showed that (1) In general, the effect of the FP1 reinforcement installation was the variation of the combination that was considered the best in reducing scouring on the cliffs and riverbeds. (2) Variation of the combination of FP1, is more effective in reducing the scouring that occurs. At the beginning of the channel turns from STA 00-06 effectively used tetrapod installation, with scours that occur as big as -5 cm, in the middle of the STA channel 06-16 effectively using the installation of bamboo flow aligner, scours that occur as much as -1.5 cm, whereas at At the end of the turn, STA 17-24 used tetrapod installation, scouring by -3.8cm.Keyword: scouring, bamboo flow aligner, tetrapod.

PENGELOLAAN LINGKUNGAN TERPADU MELALUI PELATIHAN PEMBUATAN PUPUK KOMPOS BAGI KWT NGUDI MULYO Hasanah, Himmatul; Febriyantiningrum, Kuntum; Purwantoro, Didik
JMM (Jurnal Masyarakat Mandiri) Vol 9, No 4 (2025): Agustus
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v9i4.31543

Abstrak: Masalah lingkungan selalu menjadi topik krusial di berbagai daerah, salah satunya adalah timbunan limbah hewan ternak. Untuk mengatasi masalah tersebut,perlu upaya pengelolaan lingkungan yang tepat dengan melibatkan partisipasi masyarakat. Program pengabdian kepada masyarakat merupakan salah satu upaya untuk mengatasi permasalahan lingkungan dengan sinergi antara masyarakat dan akademisi. Mitra kegiatan ini adalah Kelompok wanita tani (KWT) Ngudi Mulyo Siliran Galur Kabupaten Kulon Progo yang beranggotakan 25 orang. PKM ini bertujuan untuk meningkatkan keterampilan mitra dalam upaya pengelolaan lingkungan terpadu melalui pengolahan limbah ternak menjadi kompos. Kegiatan ini dilakukan pada bulan Juli- Oktober 2024 dengan beberapa tahapan yaitu sosialisasi, pelatihan penerapan teknologi dengan melakukan pendampingan secara intensif. Proses pengomposan dilakukan dengan penerapan teknologi sederhana yaitu dengan metode komposting dengan fermentasi semi anaerob. Hasil pupuk kompos digunakan sebagai media tanam untuk tanaman sayur di halaman pekarangan. Tingkat keberhasilan program ini aka dilihat dari peningkatan jumlah anggota KWT yang aktif, jumlah limbah yang diolah dan jumlah kompos yang dihasilkan. Kegiatan monitoring dan evaluasi dilakukan secara berkala dengan melakukan kunjungan ke rumah anggota KWT untuk menganalisis ketercapaian target dan kendala yang dihadapi. Berdasarkan hasil monitoring dan evaluasi, 25 anggota KWT aktif dan semangat dalam melakukan pengelolaan lingkungan. Peserta kegiatan telah berhasil menerapkan proses pengomposan secara mandiri di rumah dan berhasil menurunkan jumlah limbah hewan ternak dengan target 10kg/minggu dengan peningkatan keterampilan mitra sebesar 80%. Hal ini menunjukkan bahwa kegiatan pengelolaan lingkungan dapat dilakukan secara sederhana dari lingkungan itu sendiri.Abstract: Environmental issues have always been a crucial topic in various regions, one of which is the stockpiling of livestock waste. To overcome this problem, appropriate environmental management efforts are needed by involving community participation. The community service program is one of the efforts to overcome environmental problems with synergy between the community and academics. The partner of this activity is the Ngudi Mulyo Siliran Galur Farmer Women's Group (KWT), Kulon Progo Regency, which consists of 25 members. This PKM aims to improve partner skills in integrated environmental management efforts through processing livestock waste into compost. This activity was carried out in July-October 2024 with several stages, namely socialization, training in the application of technology by providing intensive assistance. The composting process is carried out by applying simple technology, namely the composting method with semi-anaerobic fermentation. The compost is used as a planting medium for vegetable plants in the yard. The success rate of this program can be seen from the increase in the number of active KWT members, the amount of waste processed and the amount of compost produced. Monitoring and evaluation activities are carried out periodically by visiting the homes of KWT members to analyze the achievement of targets and obstacles faced. Based on the results of monitoring and evaluation, 25 KWT members are active and enthusiastic in conducting environmental management with an 80% increase in partner skills. This shows that environmental management activities can be done simply from the environment itself.

Pengembangan Lab Sheet Pratikum Hidrolika untuk Program Studi S1 Pendidikan Teknik Sipil dan Perencanaan Fakultas Teknik Universitas Negeri Yogyakarta Fitriyani, Rina; Purwantoro, Didik
Jurnal Pendidikan Teknik Sipil Vol. 4 No. 2 (2022): November
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpts.v4i2.53954

Penelitian ini bertujuan untuk: 1) mendeskripsikan proses dan hasil pengembangan lab sheet Praktikum Hidrolika pada Prodi S1 PTSP FT UNY, 2) mengetahui tingkat kelayakan pengembangan lab sheet untuk Praktikum Hidrolika pada Prodi S1 PTSP FT UNY. Penelitian ini menggunakan metode Research and Development (R&D), dengan model pengembangan Four-D Models yang dipaparkan oleh Thiagarajan terdiri dari 4 tahap, yaitu Pendefinisian (Define), Perancangan (Design), Pengembangan (Develop), dan Penyebaran (Disseminate). Lokasi penelitian di Jurusan Pendidikan Teknik Sipil dan Perencanaan Fakultas Teknik dan Perencanaan Universitas Negeri Yogyakarta. Instrumen yang digunakan berupa kuesioner dengan skala Likert 5 pilihan jawaban. Tingkat kelayakan diperoleh dari ahli materi dan ahli media. Analisis data pada penelitian ini menggunakan teknik deskriptif kuantitatif dengan mencarai hasil reratanya. Berdasarkan hasil analisis dan pembahasan, diketahui bahwa:1) pengembangan media pembelajaran menggunakan tahap 4D, tahap define untuk mencari informasi yang natinya menjadi pendukung dalam pengembangan lab sheet, tahap design untuk merancang lab sheet sesuai dengan standar yang digunakan jurusan, tahap develop untuk melakukan validasi kepada ahli materi dan ahli media, dan tahap disseminate dilakuan untuk menyebarkan hasil produk yang diserahkan kepada dosen pengampu mata kuliah Praktikum Hidolika. 2) hasil validasi ahli materi dengan persentase kelayakan sebesar 76,18% dengan kategori "baik" dan hasil validasi ahli media dengan persentase kelayakan sebesar 82,06% dengan kategori "sangat baik".Kata Kunci: Penelitian & pengembangan, lab sheet, praktikum hidrolikaThis study aims to: 1) describe the process and results of the development of the Hydraulics Practicum lab sheet at the PTSP FT UNY S1 Study Program, 2) to determine the feasibility of developing a lab sheet for the Hydraulics Practicum at the PTSP FT UNY Undergraduate Study Program. This study uses the Research and Development (R&D) method, with the Four-D Models development model described by Thiagarajan consisting of 4 stages, namely Definition, Design, Development, and Dissemination. The research location is in the Department of Civil Engineering Education and Planning, Faculty of Engineering and Planning, Yogyakarta State University. The instrument used is a questionnaire with a Likert scale of 5 answer choices. The feasibility level was obtained from material experts and media experts. Data analysis in this study used a quantitative descriptive technique by looking for the average results. Based on the results of the analysis and discussion, it is known that: 1) the development of learning media uses the 4D stage, the define stage to find information that will later become a supporter in the development of the lab sheet, the design stage to design the lab sheet in accordance with the standards used by the department, the develop stage to validate to material experts and media experts, and the disseminate stage is carried out to disseminate the product results which are submitted to the lecturer in charge of the Hidolika Practicum course. 2) the results of material expert validation with a feasibility percentage of 76.18% in the "good" category and the results of media expert validation with a feasibility percentage of 82.06% in the "very good" category.

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