ahmed_youssif

Prof. Dr. Ahmed Mohamed Youssef

Professor - Professor and Consultant of Geological Hazards and Engineering

Faculty of science

Address: Sohag -Naser city

3

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A Flood Risk Management Program of Wadi Baysh Dam on the Downstream Area: An Integration of Hydrologic and Hydraulic Models, Jizan Region, KSA
For public safety, especially for people who dwell in the valley that is located downstream of a dam site, as well as the protection of economic and environmental resources, risk management programs are urgently required all over the world. Despite the high safety standards of dams because of improved engineering and excellent construction in recent times, a zero-risk guarantee is ... Read more

Sinkholes induced by uncontrolled groundwater withdrawal for agriculture in arid Saudi Arabia. Integration of remote-sensing and geophysical (ERT) techniques
Recently, an increasing number of sinkholes related to cavernous karst bedrock has been documented in the Kingdom of Saudi Arabia (KSA). One of the most hazardous areas is Al Jouf region, with an average annual rainfall below 35 mm. Here, crop fields irrigated with groundwater have experienced a very rapid expansion. Limited hydrogeological data indicate that the over-exploitation of the ... Read more

Landslide susceptibility mapping using machine learning algorithms and comparison of their performance at Abha Basin, Asir Region, Saudi Arabia
The current study aimed at evaluating the capabilities of seven advanced machine learning techniques (MLTs), including, Support Vector Machine (SVM), Random Forest (RF), Multivariate Adaptive Regression Spline (MARS), Artificial Neural Network (ANN), Quadratic Discriminant Analysis (QDA), Linear Discriminant Analysis (LDA), and Naive Bayes (NB), for landslide susceptibility modeling and comparison of their performances. Coupling machine learning algorithms with spatial data ... Read more

Multi-hazard assessment modeling via multi-criteria analysis and GIS: a case study
Multi-hazard assessment modeling comprises an essential tool in any plan that aims to mitigate the impact of future natural disasters. For a particular area they can be generated by combining assessment maps for different types of natural hazards. In the present study, the analytical hierarchy process (AHP) supported by a Geographical Information System (GIS) was utilized to initially produce assessment ... Read more

Flood-Hazard Assessment Modeling Using Multi-Criteria Analysis and GIS: A Case Study: Ras Gharib Area, Egypt
Nowadays, the use of GIS (Geographic Information Systems) is emerging as a powerful tool for the assessment of different types of natural hazards. Flash floods are among the most severe natural hazards which have disastrous socio-economic impacts. For that, it is so urgent to develop flash flood susceptibility hazard map to delineate flood prone areas. The produced map will help ... Read more

Flood Hazard Assessment of the Urban Area of Tabuk City, Kingdom of Saudi Arabia by Integrating Spatial-Based Hydrologic and Hydrodynamic Modeling
This study deals with the use of remote sensing (RS), geographic information systems (GISs), hydrologic modeling (water modeling system, WMS), and hydraulic modeling (Hydrologic Engineering Center River Analysis System, HEC-RAS) to evaluate the impact of flash flood hazards on the sustainable urban development of Tabuk City, Kingdom of Saudi Arabia (KSA). Determining the impact of flood hazards on the urban ... Read more

Agriculture Sprawl Assessment Using Multi-Temporal Remote Sensing Images and Its Environmental Impact; Al-Jouf, KSA
In this paper, multispectral and multi-temporal satellite data were used to assess the spatial and temporal evolution of the agriculture activities in the Al-Jouf region, Kingdom of Saudi Arabia (KSA). In the current study, an attempt was made to map the agriculture sprawl from 1987 to 2017 using temporal Landsat images in a geographic information system (GIS) environment for better ... Read more

Statistical Analysis of Rainfall Patterns in Jeddah City, KSA: Future Impacts
Recently, the Kingdom of Saudi Arabia (KSA) has been facing significant changes in rainstorm patterns (rainstorm intensities, frequencies, distributions) causing many flash flood events. The city of Jeddah is located in a coastal plain area, in the middle of the western side of the KSA, which represents a clear case of changing rainstorm patterns. Jeddah has been hit by many ... Read more

Site Investigation Using Engineering Geology Mapping and Geological Hazard Evaluation: Case Study of the New Hail Economic City, Hail Region, KSA
The New Hail Economic City in the Kingdom of Saudi Arabia is one of the pioneer projects and represents a corner stone for the new development activities for Hail region. It is located to the north of the Hail city, covering an area of ~156 km2. Fundamental facilities of this project will include infrastructure, residential, commercial, industrial, and a new ... Read more

Karst Induced Geo-hazards in Egypt: Case Study Slope Stability Problems Along Some Selected Desert Highways
Karst environments are characterized by distinctive landforms related to dissolution characteristics. Karst terrains, frequently underlain by cavernous carbonate and/or evaporite rocks, may induce ground instability problems. Impacts and problems associated with karst are rapidly increasing as development expands upon the karst prone areas. This has led to an escalation of karst-related environmental and engineering problems such as landslides developed on ... Read more