Publications by authors named "Abdelrazek Elnashar"

Article Synopsis
  • - This study analyzes the impact of road construction on water quality, focusing on the E18 Arendal-Tvedestrand highway in Norway, by using Remote Sensing data from Sentinel-1 and Sentinel-2 to monitor water turbidity from 2017 to 2021.
  • - Sentinel-2's Top of Atmosphere data, corrected using the MAIN algorithm, was found to be effective in estimating water turbidity levels, with findings showing a significant correlation between the corrected data and ground-based observations.
  • - Results show that road construction activities can lead to increased turbidity in nearby water bodies, highlighting the potential of Remote Sensing tools in cloud platforms like Google Earth Engine for managing water quality during such projects.
View Article and Find Full Text PDF

Modeling monthly rainfall erosivity is vital to the optimization of measures to control soil erosion. Rain gauge data combined with satellite observations can aid in enhancing rainfall erosivity estimations. Here, we presented a framework which utilized Geographically Weighted Regression approach to model global monthly rainfall erosivity.

View Article and Find Full Text PDF

Recent climate change (CC) scenarios from the Coupled Model Intercomparison Project Phase 6 (CMIP6) have just been released in coarse resolution. Deep learning (DL) based on statistical downscaling has recently been used, but more research is needed, particularly in arid regions, because little is known about their suitability for extrapolating future CC scenarios. Here we analyzed this issue by downscaling maximum, and minimum temperature over the Egyptian domain based on one General Circulation Model (GCM) as CanESM5 and two shared socioeconomic pathways (SSPs) as SSP4.

View Article and Find Full Text PDF

Actual EvapoTranspiration (ET) represents the water consumption in watersheds; distinguishing between natural and anthropogenic contributions to ET is essential for water conservation and ecological sustainability. This study proposed a framework to separate the contribution of natural and anthropogenic factors to ET of human-managed land cover types using the Random Forest Regressor (RFR). The steps include: (1) classify land cover into natural and human-managed land covers and then divide ET, meteorological, topographical, and geographical data into two parts corresponding to natural and human-managed land cover types; (2) construct a natural ET (ET) prediction model using natural land cover types of ET, and the corresponding meteorological, topographical and geographical factors; (3) the constructed ET prediction model is used to predict the ET of human-managed land cover types using the corresponding meteorological, topographical and geographical data as inputs, and (4) derive the anthropogenic ET (ET) by subtracting the natural ET from the total ET (ET) for human-managed land cover types.

View Article and Find Full Text PDF

Assessing environmentally sensitive areas (ESA) to desertification and understanding their primary drivers are necessary for applying targeted management practices to combat land degradation at the basin scale. We have developed the MEditerranean Desertification And Land Use framework in the Google Earth Engine cloud platform (MEDALUS-GEE) to map and assess the ESA index at 300 m grids in the Blue Nile Basin (BNB). The ESA index was derived from elaborating 19 key indicators representing soil, climate, vegetation, and management through the geometric mean of their sensitivity scores.

View Article and Find Full Text PDF

Assessment of soil loss and understanding its major drivers are essential to implement targeted management interventions. We have proposed and developed a Revised Universal Soil Loss Equation framework fully implemented in the Google Earth Engine cloud platform (RUSLE-GEE) for high spatial resolution (90 m) soil erosion assessment. Using RUSLE-GEE, we analyzed the soil loss rate for different erosion levels, land cover types, and slopes in the Blue Nile Basin.

View Article and Find Full Text PDF