Rachid Nedjai

Prof. Dr. Rachid Nedjai

orcid

Research Focus & Metrics

Academic Career Length

26Years (2001-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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14 September 2022 in Sensors
Verified
Journal Article
Open access
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Rita Der SarkissianRita Der Sarkissian
Rita Der Sarkissian
Mario Al SayahMario Al Sayah
Mario Al Sayah
CAchadi Abdallah
chadi Abdallah
JZJean-Marc Zaninetti
Jean-Marc Zaninetti
Rachid NedjaiRachid Nedjai
Rachid Nedjai
Land use planning for flood risk reduction has been significantly addressed in literature. However, a clear methodology for flood mitigation oriented land-use planning and its implementation, particularly in developing countries like Lebanon, is still missing. Knowledge on land use planning is still in its earliest stages in Lebanon. A lack of hazard-informed land use planning coupled to random land cover pattern evolution characterize the country. In response, this study focuses on the opportunities, challenges and uncertainties resulting from the integration of land use planning into efficient Disaster Risk Reduction (DRR). For this purpose, GIS-based analyses were first conducted on the current land use/land cover (LU/LC) of the Assi floodplain. Then, the areas land cover was retraced and its evolution after several flood occurrences was assessed. Subsequently, a flood hazard-informed LU/LC plan was proposed. The latter is mainly based on the spatial allocation of land-uses with respect to different flood hazard levels. This approach resulted in the production of a land use planning matrix for flood risk reduction. The matrix approach can serve as a tool for designing sustainable and resilient land cover patterns in other similar contexts while simultaneously providing robust contributions to decision-making and risk communication.

29 October 2020 in Theoretical and Applied Climatology
Verified
Journal Article
Closed access
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MSMario Al Sayah
Mario Al Sayah
CAchadi Abdallah
chadi Abdallah
MKMichel Khouri
Michel Khouri
Rachid NedjaiRachid Nedjai
Rachid Nedjai
TDTalal Mohamad Mohamad Darwish
Talal Mohamad Mohamad Darwish

1 May 2019 in CATENA
Verified
Journal Article
Closed access
MSMario J. Al Sayah
Mario J. Al Sayah
CAchadi Abdallah
chadi Abdallah
MKMichel Khouri
Michel Khouri
Rachid NedjaiRachid Nedjai
Rachid Nedjai
TDTalal Darwich
Talal Darwich

29 November 2019 in Water
Verified
Journal Article
Open access
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Mario Al SayahMario Al Sayah
Mario Al Sayah
Rachid NedjaiRachid Nedjai
Rachid Nedjai
Konstantinos KaffasKonstantinos Kaffas
Konstantinos Kaffas
CAchadi Abdallah
chadi Abdallah
MKMichel Khouri
Michel Khouri
The impact of ponds on basins has recently started to receive its well-deserved scientific attention. In this study, pond-induced impacts on soil erosion and sediment transport were investigated at the scale of the French Claise basin. In order to determine erosion and sediment transport patterns of the Claise, the Coordination of Information on the Environment (CORINE) erosion and Soil and Water Assessment Tool (SWAT) models were used. The impact of ponds on the studied processes was revealed by means of land cover change scenarios, using ponded versus pondless inputs. Results show that under current conditions (pond presence), 12.48% of the basin corresponds to no-erosion risk zones (attributed to the dense pond network), while 65.66% corresponds to low-erosion risk, 21.68% to moderate-erosion risk, and only 0.18% to high-erosion risk zones. The SWAT model revealed that ponded sub-basins correspond to low sediment yields areas, in contrast to the pondless sub-basins, which yield appreciably higher erosion rates. Under the alternative pondless scenario, erosion risks shifted to 1.12%, 0.52%, 76.8%, and 21.56% for no, low, moderate, and high-erosion risks, respectively, while the sediment transport pattern completely shifted to higher sediment yield zones. This approach solidifies ponds as powerful human-induced modifications to hydro/sedimentary processes.


15 January 2026 in Remote Sensing
Verified
Journal Article
Open access
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SBSofiane BOUAZIZ
Sofiane BOUAZIZ
Adel HafianeAdel Hafiane
Adel Hafiane
RCRaphael Canals
Raphael Canals
Rachid NedjaiRachid Nedjai
Rachid Nedjai
Land Surface Temperature (LST) plays a key role in climate monitoring, urban heat assessment, and land–atmosphere interactions. However, current thermal infrared satellite sensors cannot simultaneously achieve high spatial and temporal resolution. Spatio-temporal fusion (STF) techniques address this limitation by combining complementary satellite data, one with high spatial but low temporal resolution, and another with high temporal but low spatial resolution. Existing STF techniques, from classical models to modern deep learning (DL) architectures, were primarily developed for surface reflectance (SR). Their application to thermal data remains limited and often overlooks LST-specific spatial and temporal variability. This study provides a focused review of DL-based STF methods for LST. We present a formal mathematical definition of the thermal fusion task, propose a refined taxonomy of relevant DL methods, and analyze the modifications required when adapting SR-oriented models to LST. To support reproducibility and benchmarking, we introduce a new dataset comprising 51 Terra MODIS-Landsat LST pairs from 2013 to 2024, and evaluate representative models to explore their behavior on thermal data.