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Assessing the impacts of urbanisation on heritage sites in the Lefakat Region (South Benghazi, Libya): Results of a new remote sensing method and fieldwork

Published online by Cambridge University Press:  14 November 2025

Ahmed Buzaian*
Affiliation:
University of Leicester, UK
Ahmed Mutasim Abdalla Mahmoud
Affiliation:
University of Leicester, UK
Nichole Sheldrick
Affiliation:
University of Leicester, UK
Naser Alhrari
Affiliation:
Department of Antiquities, Libyan Arab Republic
Hani Hasan Alshareef
Affiliation:
Department of Antiquities, Libyan Arab Republic
*
Corresponding author: Ahmed Buzaian; Email: ab1187@leicester.ac.uk
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Abstract

Between 2023 and 2024, the Endangered Archaeology in the Middle East and North Africa (EAMENA) project and the Libyan Department of Antiquities (DoA) collaborated to apply the newly-developed EAMENA Machine Learning Automated Change Detection (MLACD) method to a series of case studies across Libya. The first of these case studies concerns the region of Lefakat, south of Benghazi, which is facing rapid urbanization, placing heritage sites under immediate threat. An initial desk-based assessment was conducted to identify archaeological sites and apply the MLACD method. Following the remote sensing analyses, a team of Libyan archaeologists from the DoA conducted fieldwork to verify and validate the results. The work involved archaeological and condition assessments of the sites. The remote sensing and fieldwork survey documented 30 archaeological sites, primarily dating from the Roman period, recording new information about these sites. The threats affecting them related primarily to urbanization and vegetation growth, looting and rubbish dumping. The approach highlighted in this article combines advanced remote sensing technologies with fieldwork validation, providing a robust framework for monitoring and safeguarding archaeological sites.

ملخص

ملخص

جرى بين عامي 2023 و2024 تعاون بين مشروع الآثار المهددة بالاندثار في الشرق الأوسط وشمال أفريقيا (EAMENA) ومصلحة الآثار الليبية (DoA) لتطبيق طريقة MLACD المُطوّرة حديثًا للكشف التلقائي عن التغيرات على سلسلة من الحالات الدراسية في أنحاء ليبيا. هذه أولى الدراسات وتتعلق بمنطقة لفعكات الواقعة جنوب بنغازي، التي تشهد تطورًا عمرانيًا متسارعًا، مما يُعرّض مواقعها التراثية لخطر داهم. بدأ العمل بتقييم مكتبي أولي لتحديد المواقع الأثرية في نطاق منطقة الدراسة ثم جرى تطبيق MLACD، وبعد تحليل نتائج الاستشعار عن بُعد، نفذ فريق من المتخصصين الآثاريين الليبيين من مصلحة الآثار الليبية عملًا ميدانيًا للتحقق من هذه النتائج والتأكد من صحتها. وقد شمل العمل الميداني تقييمات أثرية للمواقع وحالتها، حيث وثّق المسح الميداني والاستشعار عن بُعد 30 موقعًا أثريًا، يعود معظمها إلى العصر الروماني، مع تسجيل معلومات جديدة عنها. وتتمثل التهديدات الرئيسة التي تواجهها هذه المواقع في التوسع العمراني ونمو الغطاء النباتي والنهب وإلقاء النفايات. أهمية النهج الذي تُبرز ه هذه الدراسة يجمع بين تقنيات الاستشعار عن بُعد المتقدمة والتحقق الميداني، مما يوفر إطارًا متينًا لرصد المواقع الأثرية وحمايتها.

Information

Type
Articles
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of The British Institute for Libyan & Northern African Studies.
Figure 0

Figure 1. Lefakat case study area, with locations of neighbouring ancient sites and other sites mentioned in the text. Basemap: Esri World Imagery (Sources: Esri, Earthstar Geographics).

Figure 1

Table 1. Classification change table for the changes in pixels between two selected satellite images of different dates in the Lefakat study area

Figure 2

Figure 2. Results of the MLACD analysis for the Lefakat case study area for the period between 3 February 2019 and 18 January 2024. (a) Sentinel-2 image for 3 February 2019; (b) Sentinel-2 image for 18 January 2024; (c) land cover classification map for 3 February 2019; (d) land cover classification map for 18 January 2024; (e) binary change map; (f) classification change map.

Figure 3

Figure 3. Classification change maps highlighting the change from Bare to Urban class (a); and Bare to Vegetation class (b), between 3 February 2019 and 18 January 2024, and the distribution of impacted sites.

Figure 4

Figure 4. Construction activity at Umm-Mabruka detected using the MLACD. (a) areas of detected change from the Bare to Urban classes; (b) classification time series at location P; (c) normalized difference vegetation index (NDVI) time series at location P; (d) Umm-Mabruka before the start of the construction activity in March 2019; (e) during the construction activity in September 2019; (f) Umm-Mabruka in March 2023, showing further construction; (g) photo of a newly constructed building to the west of the qasr. Basemaps: (a) Google Satellite Imagery (accessed in QGIS via XYZ Tiles, September 2025) (d)-(f) Maxar Technologies, Google Earth.

Figure 5

Figure 5. Site recording form used during fieldwork.

Figure 6

Figure 6. Location of heritage sites recorded and verified in the Lefakat case study area. Numbers correspond to those listed in Table 2. Basemap: Esri World Imagery (Sources: Esri, Earthstar Geographics, Maxar Technologies).

Figure 7

Table 2. Heritage sites recorded during the Lefakat field survey, including locations (projected to WGS84 coordinate system)

Figure 8

Figure 7. Types of heritage sites recorded in the Lefakat region.

Figure 9

Figure 8. Examples of large settlements recorded in the Lefakat area. (a) Qasr Karmet Dakhil-Allah; (b) an archived image showing Hosh Ben-Zebleh before 2009 (DoA Benghazi archive); (c) Hosh Ben-Zebleh as photographed during the fieldwork in January 2024 showing its destruction.

Figure 10

Figure 9. Field survey photo documenting a fortified farm at Mafreg al-Zeitoona.

Figure 11

Table 3. Recorded conditions and disturbances at heritage sites in the Lefakat region

Figure 12

Figure 10. Overall condition of sites recorded in the Lefakat case study area. Basemap: Esri World Imagery (Sources: Esri, Earthstar Geographics, Maxar Technologies).

Figure 13

Figure 11. Number of sites in the Lefakat case study area affected by different disturbances.

Figure 14

Figure 12. (a) construction activity at Al-Qasaibah; (b) bulldozing at Qasr Ebeid; (c) vegetation growth at Siret Abdul-al-Mawla; (d) animal pen at Al-Qasaibah; (e) looting activity in Qasr Exsem; (f) dumping at Nuqtat Njayeb.

Figure 15

Figure 13. The site of Sidi Bu-Khedra. (a, b) general views of the site, in which some walls can be discerned; (c) the shrine of Sidi Bu-Khedra (Oct 2011); (d) the same site in October 2012 showing complete destruction; (e) the site as an enclosed cemetery in August 2019. Basemap: (c)-(e) Maxar Technologies, Google Earth.

Figure 16

Figure 14. Umm-Mabruka (a) in October 2011; and (b) October 2012, after the destruction of the marabout. Basemap: Maxar Technologies, Google Earth.

Figure 17

Figure 15. Comparison between the number of disturbed heritage sites detected by the MLACD method and the documented threats observed during fieldwork in Lefakat.

Figure 18

Figure 16. Example of a false negative identified at Qsur Khalita (a) a ditched qasr and a small building at Qsur Khalita; (b) evidence of bulldozing and construction activity; (c) natural vegetation at the site not detected by the MLACD; (d) image showing road and modern farm within 100 m buffer zone of the site (Basemap: Google Satellite Imagery (accessed in QGIS via XYZ Tiles, September 2025); (e) classification change map produced by MLACD for the area of Qsur Khalita identifying a large area of change from Bare to Urban (in grey) on the south edge of the buffer zone.

Figure 19

Figure 17. General view of the site of Siret (Suwayrat) al-Thaalib, showing a protective wall constructed to shield the archaeological site area from encroaching urban development.