Assessing landslide susceptibility in northern Morocco: A geostatistical mapping approach in Al Hoceima-Ajdir

IF 2.2 4区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Ayyoub Sbihi , Mohamed Mastere , Brahim Benzougagh , Velibor Spalevic , Paul Sestras , Mirjana Radovic , Slobodan B. Marković , Lizny Jaufer , Shuraik Kader
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引用次数: 0

Abstract

Landslides are a significant global risk due to their impact on nature, society, and the economy. The Al Hoceima-Ajdir region is highly susceptible to geohazards such as earthquakes and ground instabilities caused by local tectonic movements and specific climatic and geomorphological conditions. This study aims to assess landslide susceptibility in Al Hoceima-Ajdir using a digital mapping approach that integrates the geostatistical Frequency Ratio tool, geomatic tools, and field observations. The frequency ratio method, a widely used technique in geospatial analysis, evaluates the relative frequency of landslides based on the spatial distribution of conditioning factors such as slope, lithology and land use – land cover. This method calculates the ratio of the frequency of landslides within specific classes of these factors to their respective frequencies in the entire study area. This research introduces a novel susceptibility map highlighting major threats to several natural and touristic sites crucial to the region's socio-economic activities. The susceptibility map was developed by analyzing 40 historical landslides along various predisposing factors, including topographic, geo-hydrological, and anthropogenic parameters. The results identify areas prone to landslides and classify their susceptibility into five levels ranging from very high to very low, with each level indicating a different degree of risk and requiring a specific set of preventive measures. The reliability of this map was evaluated using the Receiver Operating Characteristics (ROC) method, demonstrating a high accuracy of 89%, further validated by field visits. This high-precision susceptibility map is significant for pre- and post-risk management, enhancing prevention and mitigation strategies. It also protects society, the economy, and the environment by providing a reliable regional planning and hazard management tool. The findings of this study offer a significant advancement in the methodology for landslide susceptibility assessment and present a model that can be adapted to other regions facing similar geohazards. The research underscores the importance of integrating geostatistical tools with field data to produce accurate and actionable susceptibility maps, benefitting the global scientific community by improving hazard prediction and management strategies.

评估摩洛哥北部的滑坡易发性:Al Hoceima-Ajdir 的地质统计绘图方法
由于山体滑坡对自然、社会和经济的影响,它是一个重大的全球性风险。胡塞马-阿吉迪尔地区极易受到地质灾害的影响,如当地构造运动以及特定的气候和地貌条件造成的地震和地面不稳定。本研究旨在采用数字制图方法评估胡塞马-阿吉迪尔地区的滑坡易发性,该方法综合了地质统计频率比工具、大地测量工具和实地观测。频率比方法是地理空间分析中广泛使用的一种技术,它根据坡度、岩性和土地利用--土地覆盖等条件因素的空间分布来评估滑坡的相对频率。这种方法计算的是在这些因素的特定类别中发生滑坡的频率与它们在整个研究区域中的频率之比。本研究介绍了一种新颖的易损性地图,突出了对该地区社会经济活动至关重要的几个自然和旅游景点的主要威胁。通过分析历史上 40 起山体滑坡的各种易发因素,包括地形、地质-水文和人为参数,绘制了该易发性地图。结果确定了易发生山体滑坡的地区,并将其易发性分为五个等级,从非常高到非常低不等,每个等级表示不同程度的风险,需要采取一套特定的预防措施。使用接收器工作特征(ROC)方法对该地图的可靠性进行了评估,结果表明其准确率高达 89%,实地考察进一步验证了这一点。这张高精度的易感性地图对于事前和事后的风险管理、加强预防和减灾战略都具有重要意义。它还通过提供可靠的区域规划和灾害管理工具,保护了社会、经济和环境。这项研究的结果极大地推动了滑坡易发性评估方法的发展,并提出了一个可适用于面临类似地质灾害的其他地区的模型。这项研究强调了将地质统计工具与实地数据相结合,绘制准确、可操作的易感性地图的重要性,通过改进灾害预测和管理策略,使全球科学界受益。
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来源期刊
Journal of African Earth Sciences
Journal of African Earth Sciences 地学-地球科学综合
CiteScore
4.70
自引率
4.30%
发文量
240
审稿时长
12 months
期刊介绍: The Journal of African Earth Sciences sees itself as the prime geological journal for all aspects of the Earth Sciences about the African plate. Papers dealing with peripheral areas are welcome if they demonstrate a tight link with Africa. The Journal publishes high quality, peer-reviewed scientific papers. It is devoted primarily to research papers but short communications relating to new developments of broad interest, reviews and book reviews will also be considered. Papers must have international appeal and should present work of more regional than local significance and dealing with well identified and justified scientific questions. Specialised technical papers, analytical or exploration reports must be avoided. Papers on applied geology should preferably be linked to such core disciplines and must be addressed to a more general geoscientific audience.
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