Multi-decadal assessment of shoreline changes using geospatial tools and automatic computation in Kenitra coast, Morocco

Hakkou, Mounir; Maanan, Mehdi; Belrhaba, Tarik; Khalidi, Khalid El; Ouai, Driss El; Benmohammadi, Aïcha

doi:10.1016/j.ocecoaman.2018.07.003

Cited by 35 publications

(10 citation statements)

References 50 publications

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“…Shoreline change rates were then computed using the Digital Shoreline Analysis System (DSAS) extension of ArcMap [43]. The Linear Regression Rate in m/year (LRR) was selected from all the statistical parameters available within DSAS, as is commonly used for shoreline studies [59][60][61][62][63][64][65]. The LRR determines a rate-of-change statistic by fitting a least square regression to all shorelines at a specific transects.…”

Section: Methodsmentioning

confidence: 99%

Coastal dynamism in Southern Thailand: An application of the CoastSat toolkit

et al. 2022

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In Thailand, 17% of the population lives by the coast, approximately 11 million people. A combination of coastal erosion, sea level rise and coastal land subsidence are critical issues threatening the livelihoods of coastal communities. Thailand has invested a lot of money and installed conservation policies to restore and protect coastal mangroves and realign or replenish their beaches. This study assessed the use of the toolkit Coastsat to digitise a time series of shoreline positions from open access satellite images between 1990 and 2019 along 560 km of coastline in the provinces of Krabi and Nakhon Si Thammarat (NST). Based on these digitised shorelines and the use of the software Digital Shoreline Analysis System (DSAS), it was possible to identify shoreline change, which varied between -66 to +16.4 m/y in the mangroves of NST and -22.2 to +10.6 m/year on its sandy beaches. Shoreline change rates along the Krabi coast varied -34.5 to +21.7 m/year in the mangroves and -4.1 to +4 m/year on sandy beaches. Analysis of the spatial and temporal variations of the shoreline position during the survey period reveals a linkage between extreme weather conditions and coastal erosion along the NST coast while that linkage is less clear along the Krabi coast. CoastSat delivers crucial and accurate time series shoreline data over extensive areas that are vital to coastal managers and researchers in a completely remote manner, which is key with the presence of COVID-19 travel bans.

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Section: Methodsmentioning

confidence: 99%

Coastal dynamism in Southern Thailand: An application of the CoastSat toolkit

et al. 2022

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“…The average total rainfall per year is 718.6 mm, with 0.4 and 135.09 mm as minimum and maximum recorded in July and in December, respectively. The average low, high, and daily average temperatures recorded annually are 12.8, 22.4, and 17.6°C, while the annual potential evaporation shows a range between 865.7 mm and 912 mm (Hakkou et al, 2018).…”

Section: Study Areamentioning

confidence: 98%

The Study of Peri-Urban Soil Contamination in the Kenitra Region, Morocco – Characterization and Assessment Using a Statistical Approach

El Idrissi,

Mabrouki,

Baghdad

et al. 2024

Ecol. Eng. Environ. Technol.

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The peri-urban solid waste in the Kenitra region is experiencing a significant change in terms of quantity and quality. High concentrations of both inorganic and organic materials are present in these wastes, posing a significant threat of pollution. This research sought to analyze the extent of soil contamination by heavy metals, providing valuable insights to prompt proactive interventions and propose alternative solutions for sustainable waste management. The objective of this work was to study peri-urban soil contamination in the Kenitra region-Morocco. For that purpose, several soil contamination indicators were analyzed, namely: nitrogenous, fertilizer and heavy metals concentration, soil pH, etc. The analyzed soil samples were taken from water from the different points at the levels of the studied region. The analysis shows that the studied soils are polluted with Zn, Mg, Cu, Ni, Cr, Cd, Pb, and other chemical elements. The results obtained suggest a correlation between soil pollution and the concentrations of the measured heavy metals. Furthermore, the analysis shows that heavy metals, contamination is particularly related to the presence of lead, cadmium, and zinc. The zinc contamination in the soil is about 390 mg/kg for a standard of between 0.2 and 2 mg/kg. Lead concentrations are 53 mg/kg for a standard of 0.3 mg/kg. On the basis of Moroccan standards, the soil is contaminated by lead, cadmium, and zinc.

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“…The georeferencing was done from the topographic maps while matching the aerial photos to the topographic maps (Dolan et al, 1980 In the present work, between 20 and 50 groundcontrol were captured per image, which partly minimizes the margin of error (RMS) calculated by the software, where it is necessary to calibrate images from various missions to examine the degree of overlap between the contours and notable features (roads, developments, or other features). In the context of a diachronic study using photo interpretation, it is crucial to choose a common reference line across all of the images (Moussaid et al, 2015) In this paper, the reference line chosen was the high-water line (Minoubi et al, 2018;Hakkou et al, 2018;El Khalidi et al, 2021).…”

Section: Shoreline Analysismentioning

confidence: 99%

Periodical Morphodynamic Changes of Sand Movements at El Jadida Beach

Bourhili¹,

Khalidi²,

Minoubi³

et al. 2023

Ecol. Eng. Environ. Technol.

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El Jadida Beach (X: -8.5007116; Y: 33.2316326) is a sandy beach of low altitude that constitutes a kind of enclave located between the port of El Jadida and rocky outcrops. It is influenced by natural and anthropic factors, as well as the impact of tourism, particularly during the summer, when sand is used for amusement activities (Beach Ball competition). In order to follow the morphodynamic changes of this beach, we carried out a study on two different time scales: a fifty-five years (1963 -2018) shoreline evolution study using aerial photos and satellite images based on GIS tools using the Digital Shoreline Analysis System (DSAS) and a two-years (2017-2019) morphological beach study using a Differential Global Positioning System (DGPS). According to the results obtained by the diachronic study, the beach studied showed erosion in its middle and an accumulation at these bulges. This result is due to the presence of the harbor breakwater to the NW and the rocky outcrops to the SE; acting as a barrier preventing the movement of sediments and the erosion in the middle can be explained by the reduction of the sediment supply from the Oued Oum Erabia and by the exposure of this part to the dominant swells and also the human activities like used the beach for amusement activities (Beach Ball competition and other). Beach profile observations results show accumulation in the subaerial beach and erosion in the lower part of the foreshore. The study on two different time scales adopted in this paper, allowed us to understand longshore and cross-shore sedimentary mobility.

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Multi-decadal assessment of shoreline changes using geospatial tools and automatic computation in Kenitra coast, Morocco

Cited by 35 publications

References 50 publications

Coastal dynamism in Southern Thailand: An application of the CoastSat toolkit

Coastal dynamism in Southern Thailand: An application of the CoastSat toolkit

The Study of Peri-Urban Soil Contamination in the Kenitra Region, Morocco – Characterization and Assessment Using a Statistical Approach

Periodical Morphodynamic Changes of Sand Movements at El Jadida Beach

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