Wiwin Windupranata, Wiwin
Teknik Geodesi Dan Geomatika, Fakultas Ilmu Dan Teknologi Kebumian, Institut Teknologi Bandung, Bandung, Jawa Barat, Indonesia

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Transformasi Gelombang pada Batimetri Ekstrim dengan Model Numerik SWASH Studi Kasus: Teluk Pelabuhan Ratu, Sukabumi (Hal. 26-35) Kurniadi, Yessi Nirwana; Windupranata, Wiwin
RekaRacana: Jurnal Teknil Sipil Vol 3, No 1: Maret 2017
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1613.528 KB) | DOI: 10.26760/rekaracana.v3i1.26

Abstract

ABSTRAKSWASH adalah model numerik yang dikembangkan oleh Deltares dan DELFT University of Technology. Model ini telah dikaji dalam kemampuannya memodelkan gelombang di daerah nearshore, gelombang pecah maupun run up gelombang. Namun, belum banyak penelitian yang mengkaji model numerik SWASH pada perairan dengan batimetri yang ekstrim. Kemampuan model numerik SWASH untuk simulasi hidrodinamika di daerah pantai pada kondisi ekstrim dikaji pada penelitian ini. Lokasi studi yang dipilih adalah Teluk Pelabuhan Ratu. Pada lokasi ini profil batimetri beragam terdiri dari teluk, tanjung, pantai curam, dan pada lokasi sekitar 500 m sebelah barat daya, kedalamannya mencapai lebih dari 100 m. Kondisi batimetri yang ekstrim ini sangat baik guna menguji dan mengkaji kemampuan model hidrodinamika SWASH. Hasil analisis selama 40 menit waktu simulasi menunjukkan transformasi gelombang, yaitu refraksi, refleksi, shoaling dan interferensi gelombang. Gelombang ekstrim terjadi dari hasil interferensi gelombang dan model numerik tetap stabil pada kondisi ekstrim ini. Model numerik SWASH terbukti dapat memodelkan kondisi hidrodinamika ekstrim pada batimetri ekstrim dengan baik.Kata kunci: SWASH, model numerik, gelombang, batimetri, ekstrim ABSTRACTSWASH model is numerical model developed by Deltares and DELFT University of Technology. The applicability of this model has been investigated for nearshore waves, breaking waves and also wave run up. However, there are still need to test this model into extreme condition. This numerical model has been tested for bathymetry extreme in this research. Pelabuhan Ratu Bay is choosen for this test due to its bathymetry profiles, where there are steep beach, bay, cape, and also a very deep trough. The result shows that in 40 minutes simulation time, there are wave transformation such as refraction, reflection, shoaling, and wave interference. Extreme wave due to wave interference was simulated during simulation and the numerical model was still stable. It is proofed that SWASH model can do the hydrodynamic simulation on extreme wave and also extreme bathymetry profile.Keywords: SWASH, numerical model, wave, bathymetry, extreme
Analisis Asas dan Tujuan dari Undang-Undang Kelautan, serta Peran Keilmuan Geodesi dan Geomatika dalam Implementasinya di Indonesia Nugroho, Agung P; Djunarsjah, Eka; Windupranata, Wiwin
REKA GEOMATIKA Vol 2016, No 1
Publisher : Institut Teknologi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (241.692 KB) | DOI: 10.26760/jrg.v2016i1.1831

Abstract

ABSTRAKWilayah dan potensi kelautan yang besar di Negara Kesatuan Republik Indonesia (NKRI) memerlukan pengelolaan yang sesuai agar dapat terjaga dan termanfaatkan dengan baik. Penyusunan dan pengesahan undang-undang nomor 32 tahun 2014 tentang kelautan adalah suatu bentuk usaha yang dilakukan negara dalam menata dan mengatur ruang lautnya secara terpadu. Undang-undang kelautan di dalamnya mempunyai sebelas asas dan delapan tujuan. Asas dan tujuan tersebut berisi mimpi-mimpi besar di bidang kelautan Indonesia dan harapannya dapat dicapai melalui undangundang ini. Akan tetapi kenyataanya masih banyak pekerjaan yang harus dilakukan untuk mengimplementasikannya sehingga mencapai kondisi ideal yang diharapkan. Penelitian ini bertujuan mengetahui sejauh mana undang-undang dapat diimplementasikan melalui uji prasyarat hukum undang-undang. Hasilnya undang-undang kelautan memenuhi syarat sah dan absah, sehingga dapat diimplementasikan dari aspek muatan hukum tersebut. Sedangkan, hasil analisis SWOT dan semantik bahasa menunjukkan bahwa implementasi dari undang-undang kelautan masih jauh dari harapan. Harapan kedepannya dengan dibuatnya aturan-aturan pendukung dan diperbaikinya kinerja pemerintahan, maka implementasinya akan berjalan lebih baik. Peranan bidang geodesi dan geomatika dalam bidang kelautan sudah sampai dalam tahapan membantu berbagai permasalahan di bidang kelautan.Kata kunci: undang-undang, kelautan, asas, tujuan, implementasiABSTRACTLarge marine regions and potential in the Republic of Indonesia require appropriate management and maintainance. Drafting and legitimating of maritme law no. 32 in 2014 are government effort in maintining and organizing of Indonesia sea n integrated manner. Maritime law has eleven principles and eight objectives contained within. The principles and objectives contain big dreams for Indonesian marine. These dreams hope can be achieved with the existence of this law. But in fact is still much work to be done in implementing such a big dream to reach the ideal situation. This research aims to determine in which extent legislation can be implemented and carried out to test the legal prerequisite legislation, and the result is marine legislation qualified from legitimate and legal test so that it can be implemented from the aspect of the legal aspect. While the SWOT and semantic analysis can be seen that the implementation of marine legislation is still far from expectations, expected in the future with the establishment of rules from the and improved performance of the government, the implementation will be better. For the geodesy and geomatics roles are already in the level helpin in the problems of marine field.Keywords: law, principle, objective, implementation
PENGAMATAN JANGKA PENDEK PERILAKU ARUS DAN KEKERUHAN RELATIF PADA KANAL ANTAR-TERUMBU PASCA-PASANG PERBANI Poerbandono, Poerbandono; Djunarsjah, Eka; Windupranata, Wiwin
GEOMATIKA Vol 26, No 2 (2020)
Publisher : Badan Informasi Geospasial in Partnership with MAPIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24895/JIG.2020.26-2.1071

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Makalah ini membahas perilaku jangka pendek arus dan kekeruhan relatif. Pembahasan didasarkan pada analisis data dari pengamatan lapangan di satu titik pada kedalaman sekitar 30 m. Titik pengamatan terletak di kanal antar-terumbu sekitar 600 m timur laut Pulau Pramuka ke arah Pulau Panggang. Acoustic Doppler Current Profiler (ADCP) berfrekuensi 614,4 kHz digunakan dalam pengukuran selama 25 jam dan 50 menit, sekitar dua hari setelah pasang perbani. ADCP mengukur profil arus dan hamburan balik dengan interval 1 m. Analisis dilakukan dengan menghubungkan saat perubahan kecepatan arus dengan pasut. Selain itu, kekeruhan relatif dihitung dari hamburan balik menggunakan persamaan kalibrasi empiris. Dari analisis, diperoleh korelasi positif antara tunggang pasut dengan kecepatan arus. Kecepatan arus tertinggi (yaitu 0,42 meter per detik) berkorelasi dengan saat air tinggi yang lebih rendah (lower high water). Kecepatan arus terdistribusi secara merata di sepanjang kolom air. Dibandingkan dengan di lapisan bawah, kecepatan arus di lapisan atas meningkat lebih cepat. Kekeruhan relatif yang dihitung dari hamburan balik menunjukkan bahwa material padat tersuspensi lebih banyak terkumpul di lapisan bawah. Peningkatan kekeruhan relatif diidentifikasi terjadi saat air rendah setelah air pasang tinggi (higher high water). Arah gerak arus saling berkebalikan dengan jumlah kejadian yang dua kali lebih banyak dan kecepatan arus yang dua kali lebih kuat ke arah ke arah 33° dibandingkan dengan ke arah 226°.
PETA TIGA DIMENSI (3D) CITYGML UNTUK SIMULASI ALIRAN ANGIN MENGGUNAKAN OPENFOAM Izzaty, Ghalizha Zahra; Suwardhi, Deni; Windupranata, Wiwin; Harto, Agung Budi; Wijaya, Dudy Darmawan; Murtiyoso, Arnadi; Soeksmantono, Budhy
MAJALAH ILMIAH GLOBE Vol 23, No 1 (2021)
Publisher : Badan Informasi Geospasial

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24895/MIG.2021.23-1.1260

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CityGML merupakan model data yang bersifat terbuka untuk memodelkan wilayah perkotaan maupun lanskap secara 3D. Dari lima tingkat perincian/Level of Detail (LOD) pada CityGML, LOD1 dan LOD2 menjadi tingkat perincian yang penting karena dimilikinya informasi mengenai struktur atap bangunan yang merupakan syarat data dalam pelaksanaan aplikasi seperti perencanaan detail maupun penataan lingkungan dan bangunan. Dalam mendukung perencanaan dan pengembangan perkotaan dan lanskap yang berkelanjutan, pengetahuan mengenai efek aliran angin di sekitar bangunan menjadi hal yang penting dalam menyelesaikan permasalahan perkotaan yang berkaitan dengan aliran angin. Integrasi model 3D CityGML dengan perangkat lunak simulasi Computational Fluid Dynamics (CFD) OpenFOAM dapat memberikan visualisasi dan informasi mengenai aliran angin di perkotaan dengan lebih baik. Makalah ini mempunyai tujuan untuk membangun dan memvalidasi model 3D CityGML LOD1 lanskap dari data DSM, DTM, dan tutupan lahan serta menerapkan simulasi aliran angin pada model 3D CityGML LOD1 lanskap yang telah dibangun dengan menggunakan perangkat lunak OpenFOAM. Model 3D LOD1 direkonstruksi dari data Digital Surface Model dan peta vektor 2D Kampus ITB Jatinangor, sedangkan bentuk atap pada model 3D LOD2 dihasilkan dari pengamatan stereo fotogrametri. Hasil simulasi aliran angin menunjukkan pengaruh model 3D LOD1 terhadap aliran angin berupa perubahan arah dan kecepatan, serta geometri model 3D LOD1 bangunan dan pohon menyebabkan informasi aliran angin menjadi kurang akurat di sekitar atap bangunan dan di sekeliling pohon. Hal ini dapat diperbaiki dengan menambah tingkat perincian model yang digunakan menjadi LOD2. 
The Calculation of Erosion and Sedimentation Rate in Coastal Zone Using Satellite Imageries (Case Study: Kecamatan Muara Gembong, Kabupaten Bekasi, West Java) Dianlisa Ekaputri; Wiwin Windupranata; Agung Budi Harto
Indonesian Journal of Geospatial Vol 3 No 2 (2014)
Publisher : Indonesian Journal of Geospatial

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Abstract

Abstract. Coastal zone is a transition area which always influenced by the changes of the land and ocean. The changes may occur due to the tide, current, wave, wind, sea water intrusion, runoff, contamination, or continental shelf area. As an effect, erosion and sedimentation phenomenon are occurred and could cause the changes of coastline shape. Kecamatan Muara Gembong which belongs to Kabupaten Bekasi is located in the Northern Coast of Java Island. Due to its geographical location, this area is threatened by the risk that is caused by erosion and sedimentation in the coastal zone. Therefore, study in this area is needed in order to identify the changes of the coastline. Coastline mapping through spatio-temporal LANDSAT-7 ETM+ satellite imageries is one of the methods to conduct this study. It uses satellite images from year 2000 "“ 2012. These images were processed by two visual image enhancement methods, named ratioing and BILKO algorithm, so that the visual differences between the land and the ocean could be identified. After the images were processed, coastline digitizing could be done annually from both methods. The result of this study is that there is a significant amount of erosion occurred in the coastal zone of Desa Pantai Bahagia and Desa Pantai Sederhana with the value of 139.05 Ha and 91.65 Ha from the ratioing method whereas the result from BILKO algorithm method is 141.56 Ha and 103.82 Ha. Desa Pantai Mekar has the least reduces, that is 30.44 Ha from ratioing method and 26.27 Ha from BILKO algorithm method. Based on Net Coastline Changes, the area of Kecamatan Muara Gembong from year 2000"“2012 has reduced 346.54"“349.56 Ha with the speed average of erosion that has been obtained is 28.88"“29.13 Ha/year. Keywords: coastline changes, LANDSAT-7 ETM+ satellite imageries, erosion, sedimentation
Mapping of Coastal Vulnerability Index on Coastal erosions in The Perspective of Economy (Study Area: Kecamatan Muara Gembong, Kabupaten Bekasi) Aldila Pradhana; Wiwin Windupranata; Wisayantono Wisayantono
Indonesian Journal of Geospatial Vol 3 No 1 (2014)
Publisher : Indonesian Journal of Geospatial

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Abstract

Abstract. Muara Gembong is a district that located in north coast of West Java and affected by the phenomena of coastal erosion. This phenomenon causes decreased land in Muara Gembong. To find out how vulnerable the villages in these districts by coastal erosion, it is necessary to map coastal vulnerability index. Value of coastal vulnerability index was obtained by classifying of coastal vulnerability index variable based on the value of the class and then it multiplied by the value of the weight of each variable. These variables defined into two, physical variables and non-physical variables (economy). The results of calculation are presented in tables and maps of coastal vulnerability index. Based on the research result, all coastal villages in Muara Gembong are in vulnerable conditions when calculated by non physical variables. If based on physical variables and combination variable of physical and nonphysical, three of five coastal villages are in vulnerable condition. Result of this research described the big potential of lose in economy sector. Keywords: Position, coordinates, Geodetic Reference System, Datum coordinates. 
Land Use Change Mapping in Coastal Areas Subdistrict South Bontang, Bontang, East Kalimantan Province And Its Impact on Socio-Economic Aspects Arief Ilman Yusra; Wiwin Windupranata; Dwi Wisayantono
Indonesian Journal of Geospatial Vol 2 No 1 (2013)
Publisher : Indonesian Journal of Geospatial

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Abstract. The coastal area is a center of social activity and economic activity. As a center of social and economic activities, the coastal areas are potential areas to be developed and utilized as a result that there will be changes and land uses in the form of land use. Land use is a form of physical influence of human activities on the earth's surface. Land use of an area associated with population growth and activity. The increasing population and the more intense activity in the population of a region on the increasing impact of land use change. To view and control the land use changes land use monitoring needs to be done at a certain time. Monitoring of land use can be done by identifying and interpreting information from remote sensing data in the areas of land use that will be monitored. By comparing the two forms of land use from remote sensing data of different time at the same location, will be obtained by changes in land use as well as statistical data coupled with social and economic conditions. It can be in terms of changes in the land analysis to the socio-economic aspects of the local population. The results showed that land use changes with the addition of the largest area occurs on the settlement in the amount of 43.05 Ha while, land use changes  with the greatest reduction occurred in the vast open land in the amount of 93.08 Ha. Land use changes had positive impact on social aspect with increasing population of that work as many as 21,538 people and economic aspects with poverty who reduced amounted to 1.55%. Keywords : Land Use, Land Use Change, Social Economy, Coastal Area
Implementation of Marine Fishery Information System Model for The Increasing of Fisherman Prosperity (Case of Study: Pameungpeuk District, Garut City) Amanda Putri Rudiawan; Wiwin Windupranata; Dwi Wisayantono
Indonesian Journal of Geospatial Vol 1 No 2 (2012)
Publisher : Indonesian Journal of Geospatial

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Abstract. This research bring together the development and implementation of marine fishery information system model and study of up and down stream component that are indicated have significant impact for the increasing of fisherman prosperity in Cilauteureun fishery port (PPP Cilauteureun), Pameungpeuk. The model results a daily potential fishing zone (ZPPI) map that was distributes to the fisherman. Most of the fisherman in Cilauteureun are labor fisherman who have salary that is lower than the minimum regional salary/UMR (44% of UMR). Developed ZPPI maps contain information about the location of potential fishing zone, fishing route and distance, time and capital needed, and additional information about current, wind, and wave height. Operational cost efficiency resulted from the utilization of the ZPPI maps are 54% respectively for the small capacity vehicle/MT (less than 10 GT) and 41% respectively for bigger vehicle/KM (10-15 GT capacity). The efficiency also cause the MT labor fisherman salary increaing up to 219% (achieve 98% of UMR). The integration of upstream components (ZPPI maps, vehicles and equipments facility, and human resource quality) and downstream components (catchment result sales, traetment, and distribution system) also has important role for the prosperity progress of Cilauteureun local fisherman.Keywords: fishery information system, fisherman prosperity, fisherman salary increasing, fishing zone map, operational cost efficiency, PPP Cilauteureun.
Analysis of Contributing Components to Depth Error for Multibeam Echosounding Wahyu Arif Wibowo; Dwi Wisayantono; Wiwin Windupranata
Indonesian Journal of Geospatial Vol 7 No 1 (2018)
Publisher : Indonesian Journal of Geospatial

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To achieve a high-quality depth data from MBES measurement, the error of depth should be carefully considered, especially in shallow water. To purpose of this research are (1) identifying the error budget of components into depth error and the error contribution components of depth and (2) analyzing the depth error real with an error model. Total depth error comprises of following components, which are range error, beam angle error, pitch error, roll error, sound velocity error, heave error, draught error, and water level error. These errors should be transformed into an error in depth. The equation of depth error contributions will be defined using the method of propagation of errors. Furthermore, the depth error of MBES is evaluated by standards of IHO SP-44. The results is the maximum error is water level error and the minimum error is pitch error. The errors of range, beam angle, roll, and pitch as follow: σr = ± 0.01 m, σθ = ± 0.05º, σRP = ± 0.05º, can determine the depth total error that meets the special order of IHO standard. The results of total depth error model and total depth error real achieve the same level of IHO standard.
Identifikasi dan Klasifikasi Variabel Untuk Desain Lokasi dan Rute Pipa Bawah Laut Benyamin Sadira; Wiwin Windupranata; Samsul Bachri
Indonesian Journal of Geospatial Vol 5 No 1 (2016)
Publisher : Indonesian Journal of Geospatial

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Pipa bawah laut merupakan salah satu metode transportasi minyak dan gas bumi yang efektif dan efisien. Namun dalam pemasangan pipa bawah laut terdapat beberapa tantangan. Tantangan itu sendiri tak lain adalah dari kondisi laut yang sangat dinamis dan variabel lainnya. Identifikasi terhadap variabel apa saja yang ada diperlukan untuk kepentingan pertimbangan dalam penentuan desain lokasi dan rute pipa bawah laut. Penelitian ini dilakukan untuk memberi informasi variabel yang mempengaruhi dan harus dipertimbangkan dalam penentuan desain lokasi dan rute pipa bawah laut. Metode yang dilakukan pada penelitian ini yaitu kajian berdasarkan literatur dan mempelajari penelitian terdahulu yang berhubungan dengan pipa bawah laut. Dalam pemasangan pipa bawah laut ditemukan bahwa banyak variabel yang dapat mempengaruhinya. Variabel tersebut diklasifikasikan menjadi 2 yaitu variabel alam dan variabel manusia. Variabel alam adalah variabel yang muncul akibat kondisi alam sekitar seperti aspek kimiawi dan fisis lautan. Variabel manusia adalah variabel yang muncul akibat manusia seperti aspek ekonomi, hukum, sosial, dan politik. Variabel alam dan manusia tersebut nantinya akan dianalisis sehingga didapatkan implikasi dari masing-masing variabel yang terjadi. Implikasi yang terjadi digolongkan menjadi 2 yaitu implikasi pemasangan (yang terjadi ketika perencanaan sampai pemasangan) dan implikasi operasional (yang terjadi ketika pipa sedang beroperasi). Salah satu contoh variabel alam yaitu gempa bumi yang mempunyai pengaruh terhadap ketahanan dan kestabilan pipa. Salah satu contoh variabel manusia yaitu aturan lokal yang mempengaruhi dalam instalasi pipa.