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Detecting Oil Spill Contamination Using Airborne Hyperspectral Data in the River Nile, Egypt

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Open Journal of Marine Science 2014年第2期4卷 140-150页

作者： islam abou el-magd Sameh el Kafrawy islam Farag National Authority for Remote Sensing and Space Sciences (NARSS) Cairo Egypt

Egypt is a highly populated country of about 85 million inhabitants that are concentrated on the Nile Delta and on the flood plain of the Nile River. More than 90% of this population relies on the Nile River in their water demand for domestic use. Currently, Egypt is facing a problem with the trans-boundary water budget coming from the Nile basin. This urges for managing the water quantity and quality to secure the water needs. This paper discusses the potential use of airborne hyperspectral data for water quality management in the form of detecting the oil contamination in the Nile River in integration with in-situ measurements including ASD spectroradiometer and eco-sounder multi-probe devices. The eco-sounder multi-probe device measured most of the water quality parameters and detected the existence of oil contamination at 1200 bb downstream of the study area. The airborne hyperspectral images were analyzed and calibrated with the spectral library determined from the in-situ spectroradiometer to map the patches of the oil contamination. The details of the findings and learning lessons are fully discussed in the paper.

关键词： Oil Slicks Remote Sensing Hyperspectral Data Image Processing River Nile

A Century of Monitoring Urban Growth in Menofya Governorate, Egypt, Using Remote Sensing and Geographic Information Analysis

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Journal of Geographic Information System 2015年第4期7卷 402-414页

作者： islam abou el-magd Ahmed Hasan Abdelfatah el Sayed Environmental Studies Department National Authority for Remote Sensing and Space Sciences (NARSS) Cairo Egypt Geography Department Faculty of Social Sciences Cairo University Cairo Egypt

Urban growth is a global phenomenon mainly driven by the overpopulation growth particularly in developing countries like Egypt. Pattern and extent of urban growth could be monitored and modelled on a spatial and temporal dimension. GIS and remote sensing data along with other thematic maps were used to analyze the urban growth, pattern and extent in the last century in one of the biggest governorates at the heart of the Nile Delta of Egypt. Both spatial and temporal analyses enabled to identify the pattern of urban growth and subsequently project the nature of future growth. However, the overall urban growth in the last century was 12 times the original built up areas in 1910;the third stage from 1950 to 1972 was the highest stage of urban growth with 124% increase of the built-up area. The dominant pattern of urban growth was linear along highways and railways with majority to the North, North East and North West directions. The study developed a spatial model to project urban growth by 2027, indicating that urban growth in the Menofya Governorate would be continued at the same directions with the same pattern with an estimated increase of 33%. The study provided an understanding of the controlling factors which drove the urban growth along this long time.

关键词： Urban Growth GIS Remote Sensing Modelling Menofya Governorate Egypt

Quantification of Sand Dune Movements in the South Western Part of Egypt, Using Remotely Sensed Data and GIS

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Journal of Geographic Information System 2013年第5期5卷 498-508页

作者： islam abou el-magd Osman Hassan Sayed Arafat National Authority for Remote Sensing and Space Science (NARSS) Cairo Egypt

Sand dune movement is a hazardous phenomenon in Egypt and creates major threat on the existing land use and land cover as well as developmental plans. This paper studied the sand dune morphology and quantified the rate of sand dune movements and direction in a newly developed project in the southwest of Egypt. Two dates of satellite imageries were used to trace the Barchan dunes at various sites with different morphological properties to estimate the annual movement rate based on point to point geo-correlations. 149 dunes of the common sand dunes in the area of study including barchans and transverse dunes were studied to accurately determine their rate of movements, which ranged from 1.3 to 19.3 my-1. The direction of sand dune movements was mainly to the south and slightly southeast with range from 265 to 295 degrees. The quantification of sand dune movement and direction has, indeed, enabled to determine the major threat on the exiting land use and land cover as well as the newly developmental projects.

关键词： Sand Dune Natural Hazards Remote Sensing GIS Egypt

Geomorphological monitoring of a highly dynamic estuary using oblique aerial photographs

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International Journal of Digital Earth 2009年第2期2卷 109-121页

作者： I.abou el-magd P.F.Hillman National Authority for remote sensing and Space Sciences CairoEgypt Gifford Carlton HaneSouthamptonUK588 Booth Street OttawaOntarioCanada

Bad weather in many countries limits the use of optical satellite imageries in spatial and temporal monitoring of the *** this paper,a series of lowaltitude oblique aerial photos taken on daily,weekly and monthly intervals were used to monitor the geomorphological changes in the upper part of the Mersey Estuary,northwestern *** low-altitude aerial photo methodology reveals itself to be a satisfying compromise between cost,accuracy and difficulty of *** offered a large amount of information on a spatial and temporal scale aiding in the understanding of channel *** was an important consideration in the sitting and installation of new bridge pier *** series of oblique aerial photos was used in a dynamic model to determine the migration of the ebb channel and was effective in identifying the main route of *** uncertainties were encountered and the level of accuracy achieved in resolving these uncertainties in the images was in the range from 40 cm to a maximum of 1.7 *** was compared with historical navigation charts and showed good *** applications are required to improve the quality of the data output from these images and the development of the technique.

关键词： geomorphology estuary GIS modelling oblique aerial photography,UK

Complete rectal prolapse in young Egyptian males: Is schistosomiasis really condemned?

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World Journal of Gastrointestinal Surgery 2016年第12期8卷 779-783页

作者： Ahmed A abou-Zeid islam H el Abbassy Ahmed M Kamal Dina A Somaie Unit of Colorectal Surgery Department of General Surgery El Demerdash Hospital Ain Shams University

AIM To investigate the assumption that schistosomiasis is the main cause of rectal prolapse in young Egyptian males. METHODS Twenty-one male patients between ages of 18 and 50 years with complete rectal prolapse were included in the study out of a total 29 patients with rectal prolapse admitted for surgery at Colorectal Surgery Unit, Ain Shams University hospitals between the period of January 2011 and April 2014. Patients were asked to fill out a specifically designed questionnaire about duration of the prolapse, different bowel symptoms and any past or present history of schistosomiasis. Patients also underwent flexible sigmoidoscopy and four quadrant midrectal biopsies documenting any gross or microscopic rectal pathology. Data from questionnaire and pathology results were analyzed and patients were categorized according to their socioeconomic *** Twelve patients(57%) never contracted schistosomiasis and were never susceptible to the disease, nine patients(43%) had history of the disease but were properly treated. None of the patients had gross rectal polypsand none of the patients had active schistosomiasis on histopathological examination. Fifteen patients(71%) had early onset prolapse that started in childhood, majority before the age of 5 years. Thirteen patients(62%) were habitual strainers, and four of them(19%) had straining dating since early childhood. Four patients(19%) stated that prolapse followed a period of straining that ranged between 8 mo and 2 years. Nine patients(43%) in the present study came from the low social class, 10 patients(48%) came from the working class and 2 patients(9%) came from the low middle social class. CONCLUSION Schistosomiasis should not be considered the main cause of rectal prolapse among young Egyptian males. Childhood prolapse that continues through adult life is likely involved. Childhood prolapse probably results from malnutrition, recurrent parasitic infections and diarrhea that induce straining and prolaps

关键词： Rectal prolapse Schistosomiasis Young Egyptian males Low socioeconomic status Chronic straining