Articles | Volume 6, issue 1
https://doi.org/10.5194/gi-6-141-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/gi-6-141-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Realization of daily evapotranspiration in arid ecosystems based on remote sensing techniques
Department of Hydrology and Water Resources Management, Faculty of
Meteorology, Environment & Arid Land Agriculture, King
Abdulaziz University Jeddah, 21589, Saudi Arabia
Jarbou A. Bahrawi
Department of Hydrology and Water Resources Management, Faculty of
Meteorology, Environment & Arid Land Agriculture, King
Abdulaziz University Jeddah, 21589, Saudi Arabia
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Mohamed Elhag, Ioannis Gitas, Anas Othman, and Jarbou Bahrawi
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2019-308, https://doi.org/10.5194/hess-2019-308, 2019
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Mohamed Elhag and Slivena Boteva
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The objective of this study is to test and evaluate the following FFDRS, to propose possible modifications that would better adapt these systems to the Mediterranean conditions. The implemented forest fire danger rating systems are the Canadian Forest Fire Danger Rating System (CFFDRS), and Keetch-Byram Drought Index (KBDI) of the American National Forest Fire Danger Rating System (NFFDRS).
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Geosci. Instrum. Method. Data Syst., 6, 293–300, https://doi.org/10.5194/gi-6-293-2017, https://doi.org/10.5194/gi-6-293-2017, 2017
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This article focus on morphometric features and their role in water resource management at the basin scale. The estimation of the features requires an adequate understanding of DEM feature extractions. The findings of the current study will help decision makers to improve the adopted water resource management strategies in similar geographic locations.
Mohamed Elhag and Jarbou A. Bahrawi
Geosci. Instrum. Method. Data Syst., 6, 149–158, https://doi.org/10.5194/gi-6-149-2017, https://doi.org/10.5194/gi-6-149-2017, 2017
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The current work is aimed at the quantification of the hydrological drought indices' response to soil salinity. Work has been done to overcome the problems of soil salinity on a large scale for better water resource management, especially in arid environments.
Mohamed Elhag, Ioannis Gitas, Anas Othman, and Jarbou Bahrawi
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2019-308, https://doi.org/10.5194/hess-2019-308, 2019
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Mohamed Elhag and Dalal Alshamsi
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The article deals with the designation of fault detection on the island of Crete. The delineation is based on the integration method of remote sensing and GIS. The crucial finding is how to differentiate between faults and water streams. The results showed a robust approach to fault detection.
Amal Y. Aldhebiani, Mohamed Elhag, Ahmad K. Hegazy, Hanaa K. Galal, and Norah S. Mufareh
Geosci. Instrum. Method. Data Syst., 7, 297–306, https://doi.org/10.5194/gi-7-297-2018, https://doi.org/10.5194/gi-7-297-2018, 2018
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Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2017-318, https://doi.org/10.5194/nhess-2017-318, 2017
Preprint withdrawn
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The objective of this study is to test and evaluate the following FFDRS, to propose possible modifications that would better adapt these systems to the Mediterranean conditions. The implemented forest fire danger rating systems are the Canadian Forest Fire Danger Rating System (CFFDRS), and Keetch-Byram Drought Index (KBDI) of the American National Forest Fire Danger Rating System (NFFDRS).
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Geosci. Instrum. Method. Data Syst., 6, 293–300, https://doi.org/10.5194/gi-6-293-2017, https://doi.org/10.5194/gi-6-293-2017, 2017
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This article focus on morphometric features and their role in water resource management at the basin scale. The estimation of the features requires an adequate understanding of DEM feature extractions. The findings of the current study will help decision makers to improve the adopted water resource management strategies in similar geographic locations.
Mohamed Elhag and Jarbou A. Bahrawi
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The current work is aimed at the quantification of the hydrological drought indices' response to soil salinity. Work has been done to overcome the problems of soil salinity on a large scale for better water resource management, especially in arid environments.
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Image processing
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Automatic georeferencing of astronaut auroral photography
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Masatoshi Yamauchi and Urban Brändström
Geosci. Instrum. Method. Data Syst., 12, 71–90, https://doi.org/10.5194/gi-12-71-2023, https://doi.org/10.5194/gi-12-71-2023, 2023
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Potential users of all-sky aurora images even include power companies, tourists, and aurora enthusiasts. However, these potential users are normally not familiar with interpreting these images. To make them comprehensive for more users, we developed an automatic evaluation system of auroral activity level. The method involves two steps: first making a simple set of numbers that describes the auroral activity and then further simplifying them into several levels (Level 6 is an auroral explosion).
Dorothée Vallot, Sigit Adinugroho, Robin Strand, Penelope How, Rickard Pettersson, Douglas I. Benn, and Nicholas R. J. Hulton
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Geosci. Instrum. Method. Data Syst., 6, 149–158, https://doi.org/10.5194/gi-6-149-2017, https://doi.org/10.5194/gi-6-149-2017, 2017
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Maik Riechert, Andrew P. Walsh, Alexander Gerst, and Matthew G. G. T. Taylor
Geosci. Instrum. Method. Data Syst., 5, 289–304, https://doi.org/10.5194/gi-5-289-2016, https://doi.org/10.5194/gi-5-289-2016, 2016
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Astronauts on board the International Space Station have taken thousands of high-quality images of the northern and southern lights (aurorae). Because the images were not taken as part of a specific research project, no information about exactly where the camera was pointing was available. We have used the stars in the images to reconstruct this information. Now we can tell the latitudes and longitudes of the aurorae in the images and use them for research. The data are publicly available.
A. Messerli and A. Grinsted
Geosci. Instrum. Method. Data Syst., 4, 23–34, https://doi.org/10.5194/gi-4-23-2015, https://doi.org/10.5194/gi-4-23-2015, 2015
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The use of time-lapse cameras is becoming an ever more popular method of observing changes in the natural environment. This study provides an overview of the newly developed Image GeoRectification And Feature Tracking toolbox (ImGRAFT). The paper outlines the main function of the toolbox and describes each of the key processes needed to transform a pair of terrestrial time-lapse images into a velocity field. The tool is presented using a case study of glacier surface motion at Engabreen, Norway.
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Short summary
Work has been done to overcome the problems of evapotranspiration on a large scale for better water resources management, especially in arid environments.
Work has been done to overcome the problems of evapotranspiration on a large scale for better...