Landscape Change Detection and Its Impact on Ancient Egyptian UNESCO Built Heritage in Abu Ghurab, Abusir, and Saqqara World Heritage Sites, Badrashin, Giza, Egypt

Urban expansion causes increasing risks to archaeological heritage and yet few studies have systematically analyzed multi-site urban change using consistent temporal datasets and standardized methods. In this sense, this study addresses this gap by applying a multi-temporal urban change detection framework to the Memphis region, focusing on the Abu Gurab, Abusir and Saqqara sites. To conduct this research, high-resolution satellite imagery from 2004, 2008 and 2025 was processed using harmonized geospatial classification and overlay techniques to quantify built-up area growth and identify zones where modern development threatens key monuments to include the Sun Temples of Userkaf and Nyuserre, and the pyramids of Sahure, Neferirkare and Neferefre. A GIS- and remote sensing-based workflow, combining supervised classification, post-classification comparison and buffer zone analysis, enabled precise monitoring of urban encroachment. Additionally, high-resolution imagery and in situ inspections supported detailed decay mapping of select monuments, using grayscale normalization and false-color analysis to quantify surface deterioration objectively. This approach highlights the progressive impact of urbanization on archaeological structures and provides actionable data for archaeological sites management. Finally, the results contribute to heritage risk assessment, support evidence-based conservation planning, and inform urban planning strategies in line with Sustainable Development Goal 11.4 and the UNESCO Historic Urban Landscape Recommendation (HULR).