Beaudoin J.,University of New Brunswick |
Sade R.,Survey of Israel |
Schulze B.,Communication ELAC Nautik |
Hall J.K.,Geological Survey of Israel
Hydro International | Year: 2011
The first methodical survey was carried out by the US Navy from three copper boats in the summer of 1848. They made 162 soundings with a fathom-marked linen sounding line that, without fresh water for cleansing, gradually contracted. The development of multi-beam sonar and use of a Kongsberg-Simrad EM1002 for the ongoing Israel National Bathymetric Survey offered the possibility of expanding the less than 10,000 soundings by several orders of magnitude. The survey was conducted with the R/V Taglit, a 23m, 60-ton vessel modeled on a German riverboat. An ELAC Seabeam 1050 50kHz sounder was used, based primarily on the fact that ELAC had successfully used its SB1180 180kHz version for surveys in the hydrothermally challenging 1999-2001 USGS surveys in Yellowstone Lake. Initial results from the post-processing efforts show that the nadir gap issues are not as problematic as previously thought and that the overall shouldering refraction artifact is corrected.
Ginzburg B.,NRC Soreq |
Shirman B.,Survey of Israel
Data Science Journal | Year: 2011
Long-term precise magnetic observations are being carried out at the Eilat test site as a part of active tectonic fault multi-sensor geophysical monitoring. The gradiometer system comprises three highly sensitive potassium total field sensors with short bases - up to 50 m. The gradiometer time series contain residuals of external magnetic field variations, which are essentially homogeneous over such short distances. Mutual regression analysis of the gradiometer and the vector magnetometer time series was proved to be an effective tool in reduction of the influence of external homogeneous variation on gradiometer readings. Monitoring results together with time dependence of regression coefficients are analyzed.
Yaar I.,Ministry of National Infrastructure |
Walter A.,Ministry of National Infrastructure |
Sanders Y.,Sysnet Group |
Felus Y.,Survey of Israel |
And 2 more authors.
Nuclear Engineering and Design | Year: 2016
A preliminary work aimed at allocating suitable new sites for possible NPPs in Israel is presented. The work is based on Israel's present NPP siting criteria, supported by selected procedure performed by various countries that conducted similar process. The site selection process was conducted in two stages: first, a selection procedure using demographic analysis was conducted; second, a seismological and geological analysis process was performed in the remaining area. From the combined two screening processes results, an overall new area of 569 km2 was located as a possible area for future construction of NPPs in Israel. Further and more comprehensive work, based on the IAEAs site selection guidelines, has to be performed in the future, in order to verify the preliminary findings presented in this work. © 2015 Elsevier B.V. All rights reserved.
Hanan G.,The Dead Sea and the Arava Science Center |
Michael R.,The Dead Sea and the Arava Science Center |
Boris S.,Survey of Israel |
Michael L.,Haifa University
Journal of Asian Earth Sciences | Year: 2014
The Eshet Ridge is located in the Central Arava near Wadi Paran. Geological data were collected using ground magnetic surveys and petrophysical measurements (magnetic susceptibility and density). The goal was to reveal the structure and nature of a concealed magmatic body under the ridge. Integrated gravity and magnetic interpretation together with seismic reflection data (including 23/4 modeling) indicated the presence of a deep-seated basic magmatic intrusion. Occurrence of Fe-mineralized rocks along the ridge supports subsurface data. The magmatic body was intruded in the hard Turonian rocks of the Eshet Ridge. Basic magmatic exposures dating from the Early Miocene were evident along Wadi Ashosh (in the eastern Negev) and its margins 18km. to the north of the ridge. A new outcrop of basic magmatic intrusion was found southwest of the Tzukim settlement. Magnetic measurements indicated a similarity between their magnetic pattern and the Ashosh basic magmatics, which were dated to 20.4±0.7Ma. Volcanoclastic tuff pebbles (magnetic susceptibility of around 2-7*10-3SI) surrounded by conglomerate were discovered at two sites in Wadi Demma and Wadi Menuha (streams that drain near the Eshet Ridge and 2km south of it, respectively). The conglomerates contained mostly limestone, chalk and chert fragments; not more than 5% of which were volcanic pebbles. Two pebbles were dated to 24.4±0.7and 21.5±0.5Ma. The magmatic outcrops in Wadi Ashosh, the magmatic dyke near Tzukim and the volcanic purple and black pebbles near Wadi Menuha were all dated to the very Late Oligocene-Early Miocene. The magmatic body identified in this study under the Eshet Ridge was termed the Eshet Intrusion and is connected to, and even the source of, all these phenomena. © 2014 Elsevier Ltd.
Felus Y.,Survey of Israel |
Felus Y.,Ferris State University |
Srebro H.,Survey of Israel |
Tal Y.,Survey of Israel
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives | Year: 2010
In the last two decades, there has been considerable progress in mapping and spatial data collection and today many developed countries are completely mapped. The three main challenges for National Mapping Agencies in these countries are: • How to effectively update and revise these databases with new information about our rapidly changing environment • How to integrate these geospatial data in the national databases utilizing standard relationships for data interchange • How to manage the history of changes and to manage past versions of datasets The following report describes the new approach of the Survey of Israel (SOI) for spatial data consolidation and for map revision. This approach is based on a unique spatial identifier given for every spatial feature in the database. The properties and maintenance of this identifier will be discussed along with various options that were investigated. Using this unique identifier SOI developed an algorithm to create Add, Delete and Update tables. These tables present an efficient method to store and distribute revisions and updates of the national spatial database to various organizations. The approach also allows for efficient documentation of past changes and the maintenance of historical spatial data thus creating a spatial-temporal framework for databases that includes a time-stamp versioning options. The significance of this approach to the Israeli National Spatial Data Infrastructure will be assessed using examples and a case study.