Prof. Dr. Ahmed Mohamed Youssef

Professor - Professor and Consultant of Geological Hazards and Engineering

Faculty of science

Address: Sohag -Naser city


Sinkholes detection using Electrical Resistivity Tomography (ERT) in Saudi Arabia
Karst phenomena exist in different areas in the Kingdom of Saudi Arabia, causing serious environmental problems that affect urban development and infrastructure (buildings, roads and highways). One of the most important problems are sinkholes, which most of the time consist of unfilled voids. These sinkholes are formed as a result of the chemical leaching of carbonate and evaporite formations by ... Read more

A 100-year maximum flood susceptibility mapping using integrated hydrological and hydrodynamic models: Kelantan River Corridor, Malaysia
The Kelantan River is located in the northeastern part of Peninsular Malaysia and presents a great challenge in terms of long and recurring floods. The recent floods, in the year 2005, 2006, 2007, 2008 and 2009 due to heavy monsoons rainfall have triggered these events along Kelantan River Basin. This paper summarizes the findings of the flood susceptibility analysis using ... Read more

2011 | Keywords Geotechnical investigation,
Geotechnical investigation of sewage wastewater disposal sites and use of GIS land use maps to assess environmental hazards: Sohag, upper Egypt
Land application is the only currently available technique for sewage wastewater disposal along the Nile Valley in Upper Egypt. Wastewater disposal projects have been established in the lowland desert zone extending between the cultivated floodplain and the Eocene Limestone plateau. The plan is to use the treated wastewater in irrigating woody farmlands. Some wastewater disposal sites are already operating, and ... Read more

Integrated evaluation of urban development suitability based on remote sensing and GIS techniques: contribution from the analytic hierarchy process
Urban, industrial, and tourist developments are considered of high priority in Egypt. In the current research, the site suitability investigation for rating the different environmental, geological, and geotechnical conditions facing civil engineering projects were assessed using a geographic information system (GIS) multi-criteria approach. The study area is one of the most promising areas for urban and touristic as well as ... Read more

Flash flood risk estimation along the St. Katherine road, southern Sinai, Egypt using GIS based morphometry and satellite imagery
Flash floods are considered to be one of the worst weather-related natural disasters. They are dangerous because they are sudden and are highly unpredictable following brief spells of heavy rain. Several qualitative methods exist in the literature for the estimations of the risk level of flash flood hazard within a watershed. This paper presents the utilization of remote sensing data ... Read more

2010 | Keywords Landslides. Hazard. FR. LR.,
Manifestation of remote sensing data and GIS on landslide hazard analysis using spatial-based statistical models
This paper presents landslide hazard analysis at Cameron area, Malaysia, using a geographic information system (GIS) and remote sensing data. Landslide locations were identified from interpretation of aerial photographs and field surveys. Topographical and geological data and satellite images were collected, processed, and constructed into a spatial database using GIS and image processing. The factors chosen that influence landslide occurrence ... Read more

Approaches for delineating landslide hazard areas using different training sites in an advanced artificial neural network model
The current paper presents landslide hazard analysis around the Cameron area, Malaysia, using advanced artificial neural networks with the help of Geographic Information System (GIS) and remote sensing techniques. Landslide locations were determined in the study area by interpretation of aerial photographs and from field investigations. Topographical and geological data as well as satellite images were collected, processed, and constructed ... Read more

2009 | Keywords GIS. Paleodrainages. SRTM.,
Mapping the mega paleodrainage basin using shuttle radar topography mission in Eastern Sahara and its impact on the new development projects in Southern Egypt
In the current study, the shuttle radar topography mission (SRTM) data, with ∼90 m horizontal resolution, were used to delineate the paleodrainage system and their mega basin extent in the East Sahara area. One mega-drainage basin has been detected, covering an area of 256 000 km2. It is classified into two sub mega basins. The Uweinate sub mega basin, which ... Read more

2009 | Keywords Eastern Desert. Basement,
Lithological Mapping Using Landsat Enhanced Thematic Mapper In The Central Eastern Desert, Egypt: Case Study: Area Suround Gabal Al Haded
In the current study we proposed a new band ratio combination by using Landsat Enhanced Thematic Mapper (ETM+) image. The new proposed band ratio has been tested for its effectiveness in four regions in the study area. This proposed band ratio (5/3, 3/1, 7/5 in RGB respectively) with the help of supervised classification technique succeeded in discrimination of different types ... Read more

2009 | Keywords Geomophological hazard,
Geomorphological hazard analysis along the Egyptian Red Sea coast between Safaga and Quseir
Geomophological hazard assessment is an important component of natural hazard risk assessment. This paper presents GIS-based geomorphological hazard mapping in the Red Sea area between Safaga and Quseir, Egypt. This includes the integration of published geological, geomorphological, and other data into GIS, and generation of new map products, combining governmental concerns and legal restrictions. Detailed geomorphological hazard maps for flooding ... Read more