Garuda - Garba Rujukan Digital

KARAKTERISTIK GELOMBANG PECAH MENGGUNAKAN METODE HIND CASTING DI PANTAI NAMOSAIN KOTA KUPANG Bunganaen, Wilhelmus; Manafe, Windha M.; Nasjono, Judi K.
Jurnal Teknik Sipil Vol 8, No 2 (2019): Jurnal Teknik Sipil
Publisher : Jurnal Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (213.973 KB)

Pantai adalah daerah pertemuan antara darat, laut dan udara dimana terjadi interaksi dinamis antara air, angin, dan material penyusun didalamnya. Hal ini menyebabkan pantai rentan terhadap perubahan, dimana perubahan tersebut dapat menjadi penyebab kerusakan pada daerah pesisir pantai.Gelombang adalah parameter utama yang menyebabkan perubahan pada garis pantai. Dalam penelitian inidilakukan pendekatan teori dan analisis terhadap transformasi gelombang yang terjadi di kawasan pantai Namosain Kota Kupang sebagai titik tinjauan penelitian. Berdasarkan analisa data yang dilakukan untuk kejadian angin dari tahun 2008 sampai dengan Tahun 2017 diperoleh persentasi kejadian angin terbesar berasal dari arah Barat Laut.Peramalan gelombang dengan metode hindcasting menghasilkan tinggi gelombang(H) = 3,225 meter dan periode gelombang(T) = 8,525 dtk. Koefisien refraksi sebesar 0,993 dan koefisien shoaling sebesar 0,972. Tinggi gelombang pecah yang didapat dari hasil perhitungan sebesar 4,414 meter pada kedalaman 41,00 meter.The beach is a meeting area between land, sea and air where there is a dynamic interaction between water, wind, and constituent material in it. This causes beaches to be vulnerable to change, where these changes can be a cause of damage to coastal areas. Waves are the main parameters that cause changes to the coastline. In this study a theoretical approach and analysis of the wave transformations that took place in the Namosain coastal area of Kupang City were conducted as a research review point. Based on the analysis of data carried out for wind events from 2008 to 2017, the largest percentage of wind events was from the North West. Wave forecasting with the hindcasting method produces wave height (H) = 3.225 meters and wave period (T) = 8.525 sec. The refraction coefficient is 0.993 and the shoaling coefficient is 0.972. The breaking wave height obtained from the calculation results is 4,414 meters at a depth of 41.00 meters.

EFISIENSI PENGALIRAN JARINGAN IRIGASI MALAKA (STUDI KASUS DAERAH IRIGASI MALAKA KIRI) Bunganaen, Wilhelmus; Ramang, Ruslan; Raya, Lucya L.M.
Jurnal Teknik Sipil Vol 6, No 1 (2017)
Publisher : Jurnal Teknik Sipil

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

Irrigation efficiency is defined as ratio between the total of water supplied is reduced water losses with the total supplied. Irrigation water losses that occurs during water supplying mainly caused by seepage in wet canal section, evaporation (generally insignificant) and operational losses dependent on irrigation water management system. The purposes of this research is to analyze the magnitude of the efficiency of Irrigation network in Malaka. This research is done on the primary, secondary and tertiary canal. The efficiency of Malaka irrigation network is analyzed by the method of water discharge in ? water discharge out. The data used in this analysis is the primary data such as flow rate data by current meter for primary and secondary canal and flow rate data by a float for tertiary canal. In addition to the primary data also used secondary data from the nearest Climatological Stasiun. The results of analysis, water losses caused by evaporation is very insignificant, so water losses is caused by physical canal factors with smallest water loss occurred at BBKi.1outflow-BBKi.2inflow canal is 3,541% and most of loss that occured at BNM.6outflow-BNM.7inflow canal is 0.066 m3/sec. The average efficiency of the whole network of irrigation at Malaka Kiri 84.371% with primary canal efficiency is 90.343%, and secondary canal efficiency is 82.878%.

ANALISIS KETERSEDIAAN AIR TERHADAP POLA TANAM DAN LUAS AREAL IRIGASI DAERAH IRIGASI SIAFU Bunganaen, Wilhelmus; Karbeka, Noh S.; Hangge, Elsy E.
Jurnal Teknik Sipil Vol 9, No 1 (2020)
Publisher : Jurnal Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (827.113 KB)

Irigasi merupakan usaha yang dilakukan untuk mendapatkan air dengan menggunakan bangunan pengambilan dan saluran pembawanya. Daerah irigasi Siafu berada di pulau Timor tepatnya di Desa Hoibeti, Kecamatan Kot?olin Kabupaten Timor Tengah Selatan, di mana secara geografis lokasi penelitian terletak pada koordinat 124°04?00?? BT dan 9°28?13??LS. Penelitian ini bertujuan untuk mengevaluasi ketersediaan air yang ada pada bangunan pengambilan terhadap lahan potensial yang ada di Daerah Irigasi Siafu. Metode yang digunakan dalam analisis ketersediaan air yaitu metode pengukuran dengan current meter, sedangkan untuk menganalisis kebutuhan air dan luas lahan tanam menggunakan Metode F.J Mock. Setelah dilakukan analisis luas tanam maksimal di Daerah Irigasi Siafu sebesar 151,80 ha dengan debit air sebesar 0,38 m3/dtk sedangkan debit air yang tersedia pada bangunan pengambilan sebesar 0,62 m3/dtk. Sehingga disimpulkan bahwa ketersediaan air Daerah Irigasi Siafu cukup untuk memenuhi kebutuhan air pada lahan potensial, serta pola tanam rencana yaitu Padi ? Padi ? Palawija di mulai dengan penyiapan lahan pada bulan April periode - I (pertama).Irrigation is an effort to get water by using retrieval buildings and carrier channels. The Irrigation area is on the island of Timor, precisely in the village of Hoibeti, Kot'olin District, Timor Tengah Selatan Regency, where the geographic location of the study is located at coordinates 124°04'00 'BT and 9°28'13' LS. This study aims to evaluate the availability of water available in building picking on potential land in the Siafu Irrigation Area. The method used in the analysis of water availability is the measurement method with the current meter, while for analyzing water requirements and planting area using the F.J Mock Method. After on analysis of the maximum planting area in the Siafu Irrigation Area is 151.80 ha with a discharge water of 0.38 m3/sec while the water flow available in the building is 0,62 m3/sec. From these results it can be concluded that the water availability of the Siafu Irrigation Area is sufficient to meet the water needs of potential land, as well as the planned cropping pattern, namely Rice - Rice - Crops starting with land preparation in April - I (first) period.

ANALISIS KETERSEDIAAN AIR TERHADAP POLA TANAM DAN LUAS AREAL IRIGASI DAERAH IRIGASI SIAFU Bunganaen, Wilhelmus; Karbeka, Noh S.; Hangge, Elsy E.
Jurnal Teknik Sipil Vol 9, No 1 (2020)
Publisher : Jurnal Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (827.113 KB)

Irigasi merupakan usaha yang dilakukan untuk mendapatkan air dengan menggunakan bangunan pengambilan dan saluran pembawanya. Daerah irigasi Siafu berada di pulau Timor tepatnya di Desa Hoibeti, Kecamatan Kot?olin Kabupaten Timor Tengah Selatan, di mana secara geografis lokasi penelitian terletak pada koordinat 124°04?00?? BT dan 9°28?13??LS. Penelitian ini bertujuan untuk mengevaluasi ketersediaan air yang ada pada bangunan pengambilan terhadap lahan potensial yang ada di Daerah Irigasi Siafu. Metode yang digunakan dalam analisis ketersediaan air yaitu metode pengukuran dengan current meter, sedangkan untuk menganalisis kebutuhan air dan luas lahan tanam menggunakan Metode F.J Mock. Setelah dilakukan analisis luas tanam maksimal di Daerah Irigasi Siafu sebesar 151,80 ha dengan debit air sebesar 0,38 m3/dtk sedangkan debit air yang tersedia pada bangunan pengambilan sebesar 0,62 m3/dtk. Sehingga disimpulkan bahwa ketersediaan air Daerah Irigasi Siafu cukup untuk memenuhi kebutuhan air pada lahan potensial, serta pola tanam rencana yaitu Padi ? Padi ? Palawija di mulai dengan penyiapan lahan pada bulan April periode - I (pertama).Irrigation is an effort to get water by using retrieval buildings and carrier channels. The Irrigation area is on the island of Timor, precisely in the village of Hoibeti, Kot'olin District, Timor Tengah Selatan Regency, where the geographic location of the study is located at coordinates 124°04'00 'BT and 9°28'13' LS. This study aims to evaluate the availability of water available in building picking on potential land in the Siafu Irrigation Area. The method used in the analysis of water availability is the measurement method with the current meter, while for analyzing water requirements and planting area using the F.J Mock Method. After on analysis of the maximum planting area in the Siafu Irrigation Area is 151.80 ha with a discharge water of 0.38 m3/sec while the water flow available in the building is 0,62 m3/sec. From these results it can be concluded that the water availability of the Siafu Irrigation Area is sufficient to meet the water needs of potential land, as well as the planned cropping pattern, namely Rice - Rice - Crops starting with land preparation in April - I (first) period.

Analisis Pengisian Awal (Impounding) pada Bendungan Raknamo Dengan Model Tangki Krisnayanti, Denik S; Bolla, Margareth E; Bunganaen, Wilhelmus; Damayanti, Alvine C; Nait, Costandji; Amaral, Bilgardo E.D.N.R
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 26, Nomor 1, JULI 2020
Publisher : Department of Civil Engineering, Diponegoro University

Pengisian awal (impounding) bendungan adalah langkah yang dilakukan setelah pekerjaan konstruksi bendungan selesai. Penelitian ini bertujuan untuk menentukan lama waktu dan besar volume inflow di Bendungan Raknamo pada tahun air kering, tahun air rendah, tahun air normal dan tahun air cukup dengan Model Tangki. Faktor yang berpengaruh terhadap waktu pengisian awal bendungan (impounding) ini yaitu volume inflow per tahun Waduk Raknamo diperoleh pada tahun air kering adalah sebesar 15,4898 juta m3, tahun air rendah sebesar 23,6960 juta m3, tahun air normal sebesar 32,8927 juta m3 dan pada tahun air cukup sebesar 44,0687 juta m3. Dalam perhitungan lama waktu pengisian digunakan volume inflow dari tahun air rendah. Akumulasi volume setiap bulannya dihitung sehingga lama waktu pengisian Waduk Raknamo dapat mencapai volume tampungan yang direncanakan yaitu sebesar 14,091 juta m3 dalam kurun waktu tiga setengah bulan (tiga bulan lima belas hari).

Curve Number Estimation for Ungauged Watershed in Semi-Arid Region Krisnayanti, Denik Sri; Bunganaen, Wilhelmus; Frans, John H.; Seran, Yustinus A.; Legono, Djoko
Civil Engineering Journal Vol 7, No 6 (2021): June
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/cej-2021-03091711

The Benanain Watershed is located in East Nusa Tenggara with an area of 3,181 km2 and is divided into 29 sub-watersheds. The East Nusa Tenggara itself is an eastern region of Indonesia with a unique climate condition called semi-arid. The high rainfall intensity occurring in short duration results in large surface runoff and erosion. Floods and erosion in semi-arid areas due to sensitive soils to drought and heavy rainfall extremely. This paper presents the application of the Soil Conservation Services-Curve Number (SCS-CN) real-flood flows through a digital map of soil type, land use, topography, and the heterogeneity of physical condition, especially for ungauged watersheds. The method used is an approach empirical to estimate runoff from the relationship between rainfall, land use, and soil hydrology groups. This watershed has a large area that must analyze every sub-watershed. The land-use of the Benanain watershed is secondary dryland forest by 44.26% and the hydrological soil group on the B group classification with medium to high absorption potential by 46.502% from the total area. The curve number value of the Benanain Watershed ranges from 56.54 to 73.90, where the mean CN value of 65.32. The rainfall (mm) for the 29 sub-watersheds in the Benanain Watershed has decreased by about 74.65% when being surface runoff or only 25.35% of water becomes surface runoff. The relationship between rainfall depth and CN is classified as standard response and trend line (flat slope) equilibrium occurs when rainfall depth value of 56.71 mm and CN is close to 66.30. The high variability of intense rainfall between the rainy season and the dry season had a significant influence on the curve number value in a large watershed area. Further analysis will be more accurate if it is supported by long rainfall data and observation runoff data as a control.Â Doi: 10.28991/cej-2021-03091711 Full Text: PDF

Analysis of Runoff Coefficient Value on Retention Ponds in Flores Island Krisnayanti, Denik Sri; Bunganaen, Wilhelmus; E. Hangge, Elsy; Munaisyah, Farah; A. Nursyam, Nurul; Khaerudin, Dian Noorvy
Civil and Environmental Science Journal (CIVENSE) Vol 2, No 1 (2019)
Publisher : Fakultas Teknik UB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.civense.2019.00102

Flores Island is one of four big islands in NTT province with an area Â±13,540 km divided into 8 districts. The area is included in areas with unequal distribution of rainfall. Therefore, the amount of water availability during the dry season is relatively low then require to attempts of rainwater harvesting. One of the alternatives is by building a retention pond. The important parameter in the calculation of water availability is the value of runoff coefficient. The purpose of this research is to invent the runoff coefficient value of 30 retention ponds in 8 districts of Flores Island. In this study use rainfall data, climatology and technical of retention basin for the analysis of run off coefficient. The analysis method uses the Penman modification for evapotranspiration calculation and method F.J. Mock for discharge calculation. The result in graphical model uses monthly rainfall data and land slope data. Based on the analytical calculation method, the value of run off coefficient for each district in Flores was ranging 0.00 - 0.72. The minimum value of runoff coefficient happened in November was ranging from 0.00 - 0.39, and the maximum value of runoff coefficient happened in January was ranging from 0.48 - 0.72.

Analisis Kerusakan Jalan dan Penanganannya Pada Ruas Jalan Timor Raya Km. 4 – Km. 7 Kumalawati, Andi; Radja Pono, Hilary Melanthya; Bunganaen, Wilhelmus
JURNAL FORUM TEKNIK SIPIL (J-ForTekS) Vol 3 No 2 (2023): Volume 3 No. 2 September 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/forteks.v3i2.12272

The existence of highways is very necessary to support the pace of economic growth, agriculture, and other sectors. Given the important benefits, it is for this reason that the road construction and maintenance sector is a priority to be researched and developed in implementation planning, as well as maintenance. The purpose of this study was to determine the value of the Pavement Condition Index (PCI), identify the factors causing damage to Jalan Raya Timor Km.4-Km.7 and find out the type of repair according to the type and level of damage to Jalan Raya Timor Km.4 - Km.7. The average PCI value for Jalan Timor Raya Km.4 - Km.7 was 59.67 and there were 6 types of damage that occurred on Jalan Timor Raya Km.4 - Km.7, Oesapa Village, Kupang City, namely grain release, holes, crocodile skin cracks, bleeding, corrugation and collapse. The percentage of damage that occurs according to the type of damage is Grain Release 17.29%, Collapse 40.61%, Bleeding 31.72%, Crocodile Skin Cracks 2.44%, Holes. Factors causing damage to Jalan Timor Raya Km.4 – Km.7 include: Excessive vehicle loads so that the strength of the bottom structure of the road pavement or the road pavement structure itself is not able to carry it, poor compaction implementation, uneven or excessive use of asphalt and traffic that clears before the pavement is firmly used.

Analisis Kebutuhan dan Ketersediaan Jaringan Air Bersih di Kecamatan Witihama Kabupaten Flores Timur Bunganaen, Wilhelmus; Puhu Gelong, Blasius Keli Eha; Ramang, Ruslan
JURNAL FORUM TEKNIK SIPIL (J-ForTekS) Vol 3 No 2 (2023): Volume 3 No. 2 September 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/forteks.v3i2.12470

Sumber air yang tersuplai untuk Kecamatan Witihama berasal dari sumber air Igolodo, sumber air Wailawe dan Sumber air Waibele. Oleh karena ketersediaan air yang terbatas dan kebutuhan air yang terus meningkat maka perlu dilakukan analisis untuk menetahui potensi sumber air dan kebutuhan air di Kecamatan Witihama serta menganalisis jaringan air bersih menggunakan Software Epanet 2.0. Berdasarkan hasil analisis diperoleh debit puncak kemarau sumber air Igolodo, sumber air Wailawe dan sumber air Waibele berturut-turut adalah 6,50 liter/detik, 3,52 liter/detik, dan 1,18 liter/detik. Besar kebutuhan air harian maksimum pada tahun 2040 untuk daerah layanan Igolodo, Wailawe dan Waibele berturut-turut adalah 8,66 liter/detik, 8,02 liter/detik, dan 1,06 liter/detik. Hasil analisis jaringan air bersih menggunakan Software Epanet 2.0 menyatakan semua parameter hidrolis pada node dan link bernilai positif dan memenuhi syarat PERMEN PUPR 2016.

Analisis Laju dan Volume Sedimentasi pada Embung Oelomin Menggunakan Metode MUSLE (Modified Universal Soil Loss Equation) Bunganaen, Wilhelmus; Kumalawati, Andi; Endrayani, I Desak Putu Miarsi
JURNAL FORUM TEKNIK SIPIL (J-ForTekS) Vol 4 No 1 (2024): Vol 4 No 1 (2024): Volume 4 No.1 Mei 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/forteks.v4i1.15458

Keberadaan Embung Oelomin cukup penting sebagai sumber air baku bagi masyarakat Desa Oelomin. Masyarakat mengelola lahan pertanian dengan memanfaatkan air dari embung. Umur embung telah mencapai 30 tahun tentunya mengalami beberapa perubahan yang menjadi faktor utama penyebab terjadinya erosi seperti perubahan tataguna lahan, aspek fisik serta kurangnya pemeliharaan yang berpengaruh terhadap kenaikan presentasi sedimen pada embung. Seiring waktu akan menyebabkan pendangkalan yang berpengaruh terhadap daya tampung embung. Tujuan penelitian ini untuk mengetahui besarnya laju dan volume sedimentasi yang mengendap pada Embung Oelomin. Analisis laju dan volume sedimentasi menggunakan metode MUSLE dengan faktor limpasan permukaan sebagai penyebab erosi. Hasil penelitian diperoleh laju dan volume sedimentasi pada periode ulang 2, 5, 10, 15, 20, 30, 50 dan 100 tahun yaitu 1.031,407 ton dan 398,694 m3, 1.159,730 ton dan 448,97 m3, 1.223,877 ton dan 473,093 m3, 1.245,273 ton dan 481,364 m3, 1.267,043 ton dan 489,780 m3, 1.297,154 ton dan 501,419 m3, 1.329,491 ton dan 513,919 m3, 1.364,343 ton dan 527,391 m3. Secara teoritis pada periode ulang 30 tahun tampungan mati masih dalam batas yang disediakan yaitu 940 m3.

Title

Found 75 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 75 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 75 Documents
Search