High resolution multibeam bathymetry of the Sea of Galilee (Lake Kinneret)

Sade, Aharon (Ronnie); Tibor, Gideon; Hall, John K.; Diamant, Moti; Hartman, Gal; Amit, Gideon; Schulze, Boris; Zohary, Tamar; Markel, Doron

doi:10.1560/ijes.58.2.121

Cited by 11 publications

(8 citation statements)

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“…Although multibeam echosounder bathymetry was collected in the SoG 62 , we found the single-beam bathymetric data collected prior to 2004 with different methods and errors, more effective for gathering information on morphological expressions of faults. This is because they were more easily compared, mixed and homogenized, with our 2017 survey.…”

Section: Methodsmentioning

confidence: 94%

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Neotectonics of the Sea of Galilee (northeast Israel): implication for geodynamics and seismicity along the Dead Sea Fault system

Gasperini

Lazar

Mazzini

et al. 2020

Sci Rep

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The Sea of Galilee in northeast Israel is a freshwater lake filling a morphological depression along the Dead Sea fault. it is located in a tectonically complex area, where a n-S main fault system intersects secondary fault patterns non-univocally interpreted by previous reconstructions. A set of multiscale geophysical, geochemical and seismological data, reprocessed or newly collected, was analysed to unravel the interplay between shallow tectonic deformations and geodynamic processes. the result is a neotectonic map highlighting major seismogenic faults in a key region at the boundary between the Africa/Sinai and Arabian plates. Most active seismogenic displacement occurs along nnW-SSe oriented transtensional faults. this results in a left-lateral bifurcation of the Dead Sea fault forming a rhomb-shaped depression we named the Capharnaum Trough, located off-track relative to the alleged principal deformation zone. Low-magnitude (M L = 3-4) epicentres accurately located during a recent seismic sequence are aligned along this feature, whose activity, depth and regional importance is supported by geophysical and geochemical evidence. this case study, involving a multiscale/ multidisciplinary approach, may serve as a reference for similar geodynamic settings in the world, where unravelling geometric and kinematic complexities is challenging but fundamental for reliable earthquake hazard assessments. Strike-slip deformation zones are complex tectonic domains generally showing high lateral variability. This is due mainly to strain partitioning, which can develop transtensive and transpressive deformations in response to local crustal heterogeneities or to changes in the regional stress field. Fault bends and oversteps create zones of diffuse deformation, which could mask the tracks of main active fault segments. On the other hand, diachronicity in fault activation-deactivation often creates complex patterns recording multiphase tectonic processes. Another uncertainty is whether or not deformations observed at the surface are expression of deep-seated tectonic structures. Where lakes or inland seas develop, particularly in tectonically subsiding areas, waterborne seismic reflection surveys can be a powerful tool to overcome these problems, because the relatively homogeneous and continuous sedimentary sequence which fills the depression may enhance imaging of tectonic structures, facilitating kinematic reconstructions. In the subaqueous environment, the good coupling between seismic source, substratum and receivers, together with a relative simplicity in field operations, permits acquisition of densely spaced grids of high-resolution subsurface images. Where deformation rates are high relative to sediment supply, exposed tectonic lineaments may be detected by combining seismic reflection profiles and high-resolution morpho-bathymetric maps. However, in order to produce reliable maps of active faults, these data should be coupled with other information, such as local seismicity, major historical earthquakes, geodetic ve...

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Section: Methodsmentioning

confidence: 94%

“…Single-beam bathymetry. Although multibeam echosounder bathymetry was collected in the SoG 62 , we found the single-beam bathymetric data collected prior to 2004 with different methods and errors, more effec- Table 2. Major gas components of the sampled localities.…”

Section: Methodsmentioning

confidence: 94%

Neotectonics of the Sea of Galilee (northeast Israel): implication for geodynamics and seismicity along the Dead Sea Fault system

Gasperini

Lazar

Mazzini

et al. 2020

Sci Rep

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“…EFS denotes the location of the Ein Feshkha springs. Bathymetry of the lake based on Sade et al (). The colored rectangles (blue and red for EF and MS, respectively) indicate the area shown in Figure 3.…”

Section: Introductionmentioning

confidence: 99%

Effect of Water Surface Salinity on Evaporation: The Case of a Diluted Buoyant Plume Over the Dead Sea

Mor

Assouline

Tanny

et al. 2018

Water Resources Research

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Evaporation from water bodies strongly depends on surface water salinity. Spatial variation of surface salinity of saline water bodies commonly occurs across diluted buoyant plumes fed by freshwater inflows. Although mainly studied at the pan evaporation scale, the effect of surface water salinity on evaporation has not yet been investigated by means of direct measurement at the scale of natural water bodies. The Dead Sea, a large hypersaline lake, is fed by onshore freshwater springs that form local diluted buoyant plumes, offering a unique opportunity to explore this effect. Surface heat fluxes, micrometeorological variables, and water temperature and salinity profiles were measured simultaneously and directly over the salty lake and over a region of diluted buoyant plume. Relatively close meteorological conditions prevailed in the two regions; however, surface water salinity was significantly different. Evaporation rate from the diluted plume was occasionally 3 times larger than that of the main salty lake. In the open lake, where salinity was uniform with depth, increased wind speed resulted in increased evaporation rate, as expected. However, in the buoyant plume where diluted brine floats over the hypersaline brine, wind speed above a threshold value (∼4 m s−1) caused a sharp decrease in evaporation probably due to mixing of the stratified plume and a consequent increase in the surface water salinity.

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“…Coda Octopus F180 berfungsi untuk mendapatkan data arah (heading), dan data pergerakan inersial kapal (attitude) yang terdiri dari roll, pitch, yaw, dan heave. Menurut Sade et al (2011), sistem tersebut dapat menghasilkan data pitch dan roll dengan ketelitian 0.02°, data heave dengan ketelitian 1.25 mm, dan data heading dengan ketelitian ~0.06°. Sistem kalibrasi dari sistem navigasi inersial ini menggunakan metode perhitungan yang didasarkan pada solusi aljabar linear.…”

Section: Penentuan Posisi Dan Navigasiunclassified

“…Perangkat lunak Elac (HDPpost and HDPedit) digunakan dalam tahap pengolahan data. Software tersebut digunakan untuk melakukan cleaning data, koreksi SVP, dan koreksi pasang surut sehingga produk akhir berupa data point clouds kemudian dihasilkan dan dapat digunakan untuk analisis lebih lanjut (Sade et al, 2011). Pelaksanaan survei pemetaan pada daerah Teluk Kabui dilakukan dengan melakukan lintasan melintang dari barat ke timur dimulai dari bagian utara teluk kemudian menuju bagian selatan teluk.…”

Section: Survei Batimetriunclassified

Survei Hidro-Oseanografi Di Perairan Raja Ampat, Papua Barat, Indonesia

et al. 2020

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Kepulauan Raja Ampat merupakan salah satu tujuan wisata utama di Indonesia dan juga sebagai kawasan konservasi alam. Hal tersebut disebabkan karena wilayah tersebut kaya akan keanekaragaman hayati, kenampakan dan sumber daya alam, serta budaya. Pada tahun 2014, pemerintah Indonesia menyelenggarakan kegiatan Sail Raja Ampat sebagai bagian promosi pembangunan di wilayah tersebut. Badan Pengkajian dan Penerapan Teknologi (BPPT) berperan dalam kegiatan Sail tersebut dengan menggunakan KR Baruna Jaya IV untuk melakukan survei kelautan maupun kegiatan diseminasi teknologi. Penelitian ini bertujuan untuk memberikan gambaran kegiatan survei hidro-oseanografi di perairan Raja Ampat sebagai bagian kegiatan Sail Raja Ampat. Kegiatan survei dilakukan pada dua area utama yaitu Teluk Kabui dan Selat Sagewin. Hasil menunjukkan bahwa survei tersebut mampu memberikan gambaran morfologi di kedua area tersebut. Secara batimetri perairan Teluk Kabui memiliki kedalaman antara 18 – 53 meter, sedangkan kedalaman perairan Selat Sagewin berkisar antara 104 - 508 meter. Rata – rata suhu di perairan Raja Ampat diketahui berkisar antara 28? – 29?C dan memiliki salinitas berkisar antara 32.5 - 35 psu. Litologi berupa batupasir, batugamping, dan lempung juga berhasil diketahui dari survei tersebut. Data – data ilmiah kebumian tersebut bermanfaat untuk melengkapi data – data yang sudah ada ataupun sebagai dasar perencanaan kegiatan penelitian selanjutnya. Disamping itu, data tersebut dapat dimanfaatkan untuk mengetahui karakteristik alam di perairan Raja Ampat sebagai pendukung kegiatan pembangunan di wilayah tersebut.

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High resolution multibeam bathymetry of the Sea of Galilee (Lake Kinneret)

Cited by 11 publications

References 0 publications

Neotectonics of the Sea of Galilee (northeast Israel): implication for geodynamics and seismicity along the Dead Sea Fault system

Neotectonics of the Sea of Galilee (northeast Israel): implication for geodynamics and seismicity along the Dead Sea Fault system

Effect of Water Surface Salinity on Evaporation: The Case of a Diluted Buoyant Plume Over the Dead Sea

Survei Hidro-Oseanografi Di Perairan Raja Ampat, Papua Barat, Indonesia

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