scholarly journals Kajian Pola Arus Laut dan Distribusi Sedimen Di Perairan Pantai Muara Kamal Jakarta Utara

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Permana Ari Soerjawo ◽  
Thonas Indra Maryanto
Keyword(s):  
Current Velocity ◽  
High Tide ◽  
Clay Fraction ◽  
Secondary Data ◽  
Acoustic Doppler Current Profiler ◽  
Google Earth ◽  
Ocean Current ◽  
Primary Data ◽  
Sediment Distribution ◽  
Current Profiler

ABSTRAKPola arus laut dan distribusi sedimen merupakan proses dinamika di suatu perairan yang mempunyai karakteristik berbeda-beda, sehingga berpengaruh terhadap pembentukan geomorfologi pantai di seluruh dunia. Penelitian ini bertujuan untuk mengetahui pola arus dan sedimen di perairan Pantai Muara Kamal Jakarta Utara di tahun 2012. Data yang digunakan merupakan data primer dan data sekunder, data primer meliputi data arus yang didapat dari pemasangan ADCP(Acoustic Doppler Current Profiler), data pasang surut dan sedimen perairan yang diambil dengan sedimen grab. Data sekunder berupa peta LPI (Lingkungan Pantai Indonesia) tahun 2000 skala 1:50.000 dari BIG (Badan Informasi Geospasial) dan citra satelit Google Earth tahun 2009. Hasil penelitian menunjukan bahwa kecepatan arus yang paling besar terdapat pada lapisan permukaan dengan kecepatan 0,242 m/s kearah barat daya (207,8o), kecepatan arus terkecil terdapat pada lapisan dasar yaitu 0,141 m/s kearah barat daya (207o). Hasil simulasi model hidrodinamika 2D, menunjukkan bahwa pada saat pasang arus laut mengarah ke daratan (selatan) dan pada saat surut arus laut mengarah ke laut lepas (barat laut). Berdasarkan kandungan ukuran butir sedimen di perairan Pantai Muara Kamal Jakarta Utara adalah pasir (64.98 - 72.15%) fraksi pasir tertinggi distasiun B(belakang geotekstil), lanau (24.56 - 29.36%) fraksi lanau tertinggi di stasiun C (depan geotekstil) dan Lempung (1.64 – 5.64%) fraksi lempung tertinggi di stasiun C (depan geotekstil). Kata kunci: Arus, Pantai Muara Kamal, Sedimen, model hidrodinamika 2D   ABSTRACTOcean current and sediment distribution are the dynamic process that have different charactheristic and therefore influenced beach geomorfophology around the world. This research aims to understand both ocean current and sediment pattern in Muara Kamal North Jakarta in 2012. This research used primary and secondary data, primary data were consisted of current data from ADCP (Acoustic Doppler Current Profiler), tidal data and bottom sediment samples. Secondary data involved of Indonesia Coastline Environmental map of year 2000 with scale 1:50.000 from Geospatial information Agency and a satellite data from Google earth of year 2009. The results showed that greatest ocean current velocity contained in the surface layer at a speed of 0,242 m/s with to southwest direction (207.8o), the smallest current velocity was in bottom layer is 0.141 m/s with southwest directiont (207o). Based on 2D hydrodynamic model simulation indicated that when high tide ocean current was flowed to the mainland (south) when low tide the current was flowed to the open sea direction. Based on the content grain size of the sediment, the studi area consisted of sand (64.98 - 72.15%) the highest sand fraction at station B(rare of geotextile) , silt (24.56 - 29.36%) the highest silt fraction at station C (front of geotextile) andclay (1.64 – 5.64%) the highest clay fraction at station C(front of geotextile) Key Words: Current, Muara Kamal Shoreline, Sediment, 2D hydrodynamics model

scholarly journals Hydro-Oceanographic Characteristics In Karimunjawa Coastal Waters During The 1st Transitional Season

Jurnal Segara ◽  
2021 ◽  
Vol 17 (2) ◽  
pp. 107
Author(s):  
Yulius Yulius ◽  
Joko Prihantono ◽  
Dino Gunawan ◽  
Muhammad Ramdhan ◽  
August Daulat ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Secondary Data ◽  
Acoustic Doppler Current Profiler ◽  
Least Square Method ◽  
Least Square ◽  
Ocean Current ◽  
Primary Data ◽  
Peak Period ◽  
Waves And Currents ◽  
Matlab Programming

This study aims to determine oceanographic characteristics such as tides, waves, and currents in Karimunjawa Coastal Waters during the 1st transitional season and to update the oceanographic database for spatial management evaluation in the region. The tidal characteristics were obtained from the least square method analysis using World Tide software based on Matlab programming language, while wave and current characteristics obtained from 2-dimensional numerical modeling using Mike 21 software on the flow model and spectral wave module. The primary data used were the significant wave height (Hs), wave peak period (Tp), and ocean current components (u and v velocity) on 13-26 May 2016 using the Sontex Argonaut XR type Acoustic Doppler Current Profiler (ADCP) equipment. Tide data were predicted for the Kemujan Islands station from 1-31 March 2020. Secondary data for additional numerical model input were obtained from ERA5-reanalysis in the form of Hs, Tp, u, and v wind velocity data for May 2020 with a temporal resolution of 20 minutes, while bathymetry data derived from GEBCO Satellite Derivated Bathymetry (SDB) data. The tide analysis results showed that Karimunjawa waters are a single daily mixed tidal type. The wave characteristic moves from east to west with high waves reached 0.9 meters and a peak period of 7 seconds. The eastern side of Karimunjawa Island, Kemujan Island, and the western area have a calmer wave. The current characteristic moves northeastward with a speed of 5-28 cm/s, which concludes that in several locations, such as the Menjangan Besar-Menjangan Kecil strait, the currents depend on the tidal conditions.

scholarly journals Analysis of Animal Accidents along the Road of Padamara-Karangcegak in Geospatial Perspective

2019 ◽  
Vol 33 (1) ◽  
pp. 39-50
Author(s):  
Sakinah Fathrunnadi Shalihati ◽  
Esti Sarjanti
Keyword(s):  
Physical Environment ◽  
Satellite Image ◽  
Secondary Data ◽  
Google Earth ◽  
Qualitative Description ◽  
Primary Data ◽  
The Road ◽  
Primary Data Analysis ◽  
Animal Habitat ◽  
Potential Width

The occurrence of animal accidents is one of the consequences of physical environmental interaction of animal in terms of their movement from one place to another and non physical environment in the form of transportation usage by human. Accidents happened to animals can affect the structure of the food chain. It would be a matter if it occurred continuously because some species of animals that were important to the ecosystem would not exist anymore. The records of the frequency of animal accident and habitat along Jalan Padamara-Karangcegak by geospatial could be used to analyze the correlation between the dominance of animal species getting the accidents and the potential width of the habitat owned along the road. Qualitative description was used as the method of the research. It was from the primary data analysis of the distribution of accident and secondary data of the land use from Google Earth of  satellite image which was then processed by Geographic Information System. The results obtained during observations from April to July 2016 showed that there was a correlation between the animal habitat and the accidents happened. The animal with a wider habitat dominated the accidents occurred than animals with no extensive habitat.

scholarly journals Quantifying Suspended Sediment using Acoustic Doppler Current Profiler in Tidung Island Seawaters

2021 ◽  
Vol 29 (1) ◽  
Author(s):  
Henry Munandar Manik ◽  
Randi Firdaus
Keyword(s):  
Water Column ◽  
Suspended Sediment ◽  
Suspended Solids ◽  
Acoustic Doppler Current Profiler ◽  
Sediment Concentration ◽  
In Situ Measurement ◽  
Ocean Current ◽  
Echo Intensity ◽  
Current Profiler

Tidung Island, located near Jakarta Bay, is a tourism and conservation area. It is necessary to keep these seawaters unpolluted. To calculate the level of pollution, it is necessary to know the sediment concentration. Quantifying concentration suspended sediment is important for knowledge of sediment transport. Researchers usually use water sample analysis and optical method for quantifying suspended sediment in seawater. Less accuracies of these methods are due to under sample of seawater and the existence of biological fouling. One promising method to measure concentration of suspended sediment is using Acoustic Doppler Current Profiler (ADCP). ADCP is usually used by oceanographer and hydrographer to measure ocean current. In this research, ADCP with 300 kHz operating frequency was used effectively to measure suspended sediment concentration (SSC) and ocean current simultaneously. The echo intensity received from suspended sediment was computed using sonar equations to quantify SSC. The empirical equation between echo intensity and SSC was found. The SSC value obtained by ADCP was also compared with in situ measurement. The result showed that quantified SSC value obtained by ADCP was nearly equal with SSC obtained from in situ measurement with coefficient correlation of 0.98. The high concentration ranged from 55 mg/L to 80 mg/L at the surface layer to a depth 12 m, moderate concentration ranged from 45 mg/L to 55 mg/L at a depth 12 m to 40 m, and low concentration less than 45 mg/L at a depth greater than 40 m. The distribution of SSC was correlated with ocean current condition. In small currents, suspended solids will settle faster so that the concentration in the water column will decrease. Conversely, if the velocity is high, suspended solids will continue to float carried by the current in the water column so that the concentration is high.

scholarly journals A Method for Processing Acoustic Doppler Current Profiler Velocity Data from Towed, Undulating Vehicles

2008 ◽  
Vol 25 (9) ◽  
pp. 1710-1716 ◽  
Author(s):  
Jiayi Pan ◽  
David A. Jay
Keyword(s):  
Surface Waters ◽  
High Frequency ◽  
Acoustic Doppler Current Profiler ◽  
Small Time ◽  
Ocean Current ◽  
Near Surface ◽  
Vertical Range ◽  
External Reference ◽  
Current Profiler ◽  
Adcp Measurements

Abstract The utility of the acoustic Doppler current profiler (ADCP) for sampling small time and space scales of coastal environments can be enhanced by mounting a high-frequency (1200 kHz) ADCP on an oscillating towed body. This approach requires both an external reference to convert the measured shears to velocities in the earth coordinates and a method to determine the towed body velocities. During the River Influence on the Shelf Ecosystems (RISE) project cruise, a high-frequency (1200 kHz) and narrowbeam ADCP with mode 12 sampling was mounted on a TRIAXUS oscillating towfish, which steers a 3D path behind the ship. This deployment approach extended the vertical range of the ADCP and allowed it to sample near-surface waters outside the ship’s wake. The measurements from a ship-mounted 1200-kHz narrowbeam ADCP are used as references for TRIAXUS ADCP data, and a method of overlapping bins is employed to recover the entire vertical range of the TRIAXUS ADCP. The TRIAXUS vehicle horizontal velocities are obtained by removing the derived ocean current velocity from the TRIAXUS ADCP measurements. The results show that the method is practical.

scholarly journals The Impact of Infrastructure of South Cross Road Line Toward Land Value

2021 ◽  
Vol 11 (2) ◽  
pp. 212
Author(s):  
Lustina Fajar Prastiwi ◽  
Inayati Nuraini Dwiputri
Keyword(s):  
Secondary Data ◽  
Google Earth ◽  
Primary Data ◽  
Land Value ◽  
Mountain Area ◽  
Cross Sectional ◽  
Production Factors ◽  
Infrastructure Project ◽  
Land Transaction ◽  
The Impact

Land is one of the production factors in an economical activity. The demand for a new property is never low, while its existence is limited. This research was conducted in Purwosari Sub-district, Gunungkidul Regency, DIY Province. The researcher chose four villages to did this research, they are Giriasih Village, Girijati Village, Giripurwo Village, and Giricahyo Village. Those villages located in the Sewu Mountain area, Gunungkidul, near Parangtritis Beach. They are passed by JJLS infrastructure project. The purpose of the research is to identify the impact of JJLS project on the pattern of the land value surround 2016. Furthermore, the researcher aims to find the factors behind. Explorative research is used as the research design in this research. The primary data source gained from a measurement using Google Earth software. The secondary data is based on property purchase transaction recording from BKAD Gunungkidul. Thus, the data type is cross-sectional of the land transaction in 2016. This was done by using convenience sampling. The findings of the research show that there is a weakening of 1.5% per kilometers for property which is far away from JJLS. The highness price of the land influenced by some factors, such as land area (4,68%), the distance to CBD (0,0535%), the type of field land (3,65%), and the adequate accessibility (2,96%).

scholarly journals Studi Penjalaran Gelombang Laut di Pulau Panjang, Kabupaten Jepara

2021 ◽  
Vol 10 (1) ◽  
pp. 75-87
Author(s):  
Tri Widya Laksana Putra ◽  
Muhammad Zainuri ◽  
Denny Nugroho Sugianto
Keyword(s):  
Wave Propagation ◽  
Direct Measurement ◽  
Hydrodynamic Model ◽  
High Tide ◽  
Acoustic Doppler Current Profiler ◽  
Wind Data ◽  
Two Dimensional ◽  
Single Beam ◽  
Current Profiler ◽  
The Waves

Pulau Panjang terletak di sebelah barat pantai Kota Jepara memiliki luas wilayah teritorial 30 Ha dan dimanfaatan sebagai wisata pulau, wisata ziarah, dan lokasi penangkapan ikan. Kombinasi kondisi gelombang ekstrim dan air pasang mengakibatkan tekanan kuat di pesisir Pulau Panjang sehingga menimbulkan kerusakan pada fasilitas wisata. Berdasarkan hal tersebut, diperlukan adanya analisis mengenai karakteristik penjalaran gelombang laut untuk menunjang segala jenis kegiatan masyarakat. Analisis penjalaran gelombang dilakukan melalui pendekatan pemodelan numerik hidrodinamika dua dimensi (two-dimensional hydrodynamic model). Data primer yang digunakan adalah data pengukuran langsung nilai gelombang menggunakan instrument Acoustic Doppler Current Profiler dan pengukuran langsung data batimetri menggunakan instrument single-beam echosounder. Data sekunder meliputi data angin (1999 – 2019) yang didapatkan dari portal unduh data di www.ogimet.com, data pasang surut BMKG dan data batimetri dari Badan Informasi Geospasial. Tinggi gelombang signifikan (Hs) dan periode signifikan (Ts) didapatkan dari konversi data angin menjadi nilai Hs dan Ts dengan metode DNS. Nilai Hs dan Ts maksimal setiap arah mata angin mmenjadi input perhitungan model hidrdodinamika. Hasil spasial penjalaran gelombang tertinggi terjadi pada arah datang gelombang dari arah timur laut, tenggara dan barat.  Penjalaran gelombang di Pulau Panjang menciptakan daerah terlindung di sisi seberang dari arah datang gelombang dan saat gelombang endekati pantai penjalaran gelombang mengikuti kontur garis pantai diikuti dengan melemahnya kecepatan rambat gelombang. Panjang Island is located on the west coast of Jepara City and has a territorial area of 30 hectares and is used as island tourism, pilgrimage tours, and fishing locations. The combination of extreme wave conditions and high tide resulted in strong force on the coast of Panjang Island causing damage to tourist facilities. Based on this, it is necessary to have an characteristics analysis of the sea waves propagation to support all types of community activities. Analysis of the propagation of the waves was carried out using a two-dimensional hydrodynamic model approach. The primary data used are direct measurement data of wave values using the Acoustic Doppler Current Profiler instrument and direct measurement of bathymetric data using a single-beam echosounder instrument. Secondary data includes wind data (1999 - 2019) obtained from the data download portal at www.ogimet.com, BMKG tidal data and bathymetry data from the Geospatial Information Agency. Significant wave height (Hs) and significant period (Ts) are obtained from the conversion of wind data into Hs and Ts values using the DNS method. The maximum Hs and Ts values for each cardinal direction are the input for calculating the hydrodynamic model. The highest spatial results of wave propagation occur in the coming direction of waves from the northeast, southeast and west. The wave propagation in Panjang Island creates a protected area on the opposite side from the direction of the waves coming and when the waves approach the coast the propagation of the waves follow the contours of the coastline followed by a weakening of the wave propagation speed.

scholarly journals PEMETAAN POTENSI BIOGAS DAN PUPUK DARI KOTORAN SAPI UNTUK MENDUKUNG WISATA PAMELO DI DESA BAGENG KECAMATAN GEMBONG KABUPATEN PATI

2018 ◽  
Vol 11 (2) ◽  
pp. 103-112
Author(s):  
Hermain Teguh Prayitno
Keyword(s):  
Data Processing ◽  
Environmental Pollution ◽  
Satellite Images ◽  
Public Information ◽  
Secondary Data ◽  
Google Earth ◽  
Primary Data ◽  
Energy Needs ◽  
Map Data

ENGLISHBageng village is a village which has pummelo plant and the highest number of cattle in Gembong Subdistrict. Therefore, this area known as the Pummelo Tourism Village. High number of cattle not followed by good handling of cow waste so that in some areas experience the environmental pollution. To reach the better pummelo tourism village, it necessary to improve the quality of the environment. One of the way is by mapping the potential of biogas from cow waste. This study aims to: 1) describe the condition of cattle in Bageng village; 2) mapping the potential of biogas and manure from cow waste for development of Pummelo. This research is exploratory. The primary data required includes cage density, number of cattle, the amount of pummelo and public information obtained from the questionnaire. Secondary data were obtained from village and subdistrict monograph. Data processing is also reinforced with satellite images of google earth, the google MAP data. The results showed that : 1) The number of cattle counted 508-720 head with 8.7 tons of cow waste/day; 2) The largest biogas potency contained in Rubiyah hamlet Bageng village. From this research are expected the use of cow waste as biogas to meet the energy needs of the communities as well as to meet the needs of Pummelo plant manure. INDONESIADesa Bageng merupakan desa yang memiliki tanaman jeruk pamelo dan jumlah ternak sapi tertinggi di Kecamatan Gembong. Oleh karenanya, daerah ini dikenal sebagai Desa Wisata Pamelo. Jumlah ternak sapi yang tinggi tidak diikuti dengan penanganan kotoran sapi yang baik sehingga di beberapa daerah mengalami pencemaran lingkungan. Untuk menuju Desa Wisata Pamelo yang lebih baik, diperlukan adanya peningkatan kualitas lingkungan. Salah satunya dengan cara pemetaan potensi biogas dari kotoran sapi. Penelitian ini bertujuan untuk: 1) menggambarkan kondisi ternak sapi Desa Bageng; 2) memetakan potensi biogas dan pupuk dari pemanfaatan kotoran sapi untuk perkembangan Jeruk Pamelo. Penelitian ini merupakan penelitian eksploratif. Data primer yang dibutuhkan meliputi kerapatan kandang, jumlah ternak, jumlah jeruk pamelo dan informasi masyarakat yang diperoleh dari kuesioner. Data sekunder diperoleh dari Monografi Desa dan Kecamatan. Pengolahan data juga diperkuat dengan foto citra satelit google earth, data google MAP. Hasil penelitian ini menunjukkan bahwa: 1) Jumlah ternak sapi terhitung 508 – 720 ekor dengan 8,7 ton kotoran sapi /hari; 2) Potensi biogas terbesar terdapat di Dukuh Rubiyah Desa Bageng. Dari penelitian ini diharapkan adanya pemanfaatan kotoran sapi sebagai biogas untuk mencukupi kebutuhan masyarakat akan energi sekaligus untuk memenuhi kebutuhan pupuk tanaman Jeruk Pamelo.

scholarly journals Analysis of biogeophysics characteristics and discharge of Lompo Riaja Atas river and Lompo Riaja Bawah river, Ralla sub watershed

2019 ◽  
Vol 8 (1) ◽  
pp. 27
Author(s):  
Usman Arsyad ◽  
Beta Putranto ◽  
Nur Aeni ◽  
Wahyudi Isnan ◽  
Hasnawir Hasnawir
Keyword(s):  
Land Cover ◽  
River Discharge ◽  
Gradient Flow ◽  
Secondary Data ◽  
Management Plan ◽  
Google Earth ◽  
Primary Data ◽  
Flow Density ◽  
Land Type ◽  
Quantitative Descriptive

The biogeophysical characteristics of watersheds have an important role as a determinant of the river discharge amount in the watershed. Various watershed problems such as flood and drought related to river discharge require data and information. The importance of this data and information will determine a better watershed management plan. The issue of flooding and drought are the important issues in Ralla sub watershed, Souht Sulawesi Province. This study aims to describe the biogeophysical characteristics and the discharge of Lompo Riaja Atas and Lompo Riaja Bawah Rivers in Ralla sub watershed, Lisu Watershed. This research was conducted in from November 2016 to August 2017. Primary data collection was done through river discharge and precipitation measurements during 34 days of observation. Secondary data obtained from government or related agencies such as geological data obtained from Geological map of the Ujung Pandang sheet 1982, the slope data from Aster DEM, land type from RePPProt 1987, land cover data from google earth image 2015. A quantitative descriptive method was used to analyze the data obtained. The results showed that the Lompo Riaja Atas and Lompo Riaja Bawah rivers have relatively similar discharge fluctuation, although they have a different amount of discharge. River discharge of both rivers is more influenced by rainfall compared to biogeophysical conditions such as geology, topography, soil type, watershed area, watershed shape, river length and order, gradient, flow pattern, flow density, and land cover.

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