Publications
Geological and Geotechnical Studies Aimed at the Project and Construction of Rockfill Recharge Dams: The Case Study of the Wadi Sulayf Dam, Wilayat Ibri Region, Oman
A novel approach to sustainable water management in Oman's semi-desert region has been successfully demonstrated through the construction of rockfill recharge dams, which utilize temporary floodwaters to augment the Aflaj irrigation system. The Wadi Sulayf Dam, a 3200-meter structure near Ibri Town, serves as a case study showcasing the integration of geological and geotechnical design principles with practical implementation. Despite encountering significant flooding during construction—an event that typically causes structural damage—the dam remained intact, highlighting its robust engineering. This project not only addresses growing water demand for drinking and agriculture but also provides a model for resilient infrastructure development in arid environments.
Hydrological impacts of recharge dams on Aflaj systems in Oman: A long-term analysis
Recharge dams significantly enhance the sustainability of traditional Aflaj irrigation systems, increasing annual discharge volumes by 65% and improving flow stability by 25%, even during low rainfall events. This long-term analysis, spanning 24 years in Oman's North Sharqiyah Governorate, compared two catchments—one with a recharge dam and one without—to assess hydrological impacts. Findings reveal that dams mitigate groundwater depletion trends, stabilize discharge flows, and buffer climate-induced fluctuations, providing quantitative evidence for integrating modern infrastructure with ancient water management practices to ensure long-term resilience in arid regions.
Re-instating the Indigenous Ecology of Oman's Aflaj in Zahran Al Qasimi's Taghribat Al-Qafer or The Exile of the Water Diviner
Zahran Al Qasimi's novel Taghribat Al-Qafer or The Exile of the Water Diviner (2022) challenges global hegemonic narratives on environmental sustainability by reaffirming the Indigenous ecological knowledge embedded in Oman’s aflaj irrigation systems. Through a syncretic narrative blending tribal history with contemporary themes, the work exposes and preserves the social and environmental dimensions of aflaj practices, which have sustained Omani communities for centuries. The study argues that Al Qasimi’s narrative transcends functional sustainability, instead framing aflaj as a cornerstone of Omani identity, relational epistemologies, and posthuman ecologies rooted in interconnectedness, resilience ('survivance'), and regenerative hope. By mobilizing Indigenous environmental advocacy, the novel counters epistemic monopolization while weaving local cosmologies and ethics into a broader framework of place-based sustainability.
Assessing the Impact of Land Use and Land Cover Changes on Aflaj Systems over a 36-Year Period
Over the past 36 years, Oman's aflaj irrigation systems—ancient underground water networks—have faced significant land use and land cover (LULC) changes, primarily driven by urban expansion. A study analyzing four major aflaj in northern Oman found that between 1985 and 2021, agricultural lands were converted to urban areas at rates of up to 40%, leading to a decline in vegetation cover and groundwater resources. Using satellite imagery, GIS, and remote sensing, researchers classified LULC changes with high accuracy (90–95%), revealing shifts from bare soil to urban areas and from vegetation to bare soil. These findings underscore the need for sustainable land management strategies to preserve aflaj systems, which are critical for water security in arid regions.
Machine Learning and Hyperparameters Algorithms for Identifying Groundwater Aflaj Potential Mapping in Semi-Arid Ecosystems Using LiDAR, Sentinel-2, GIS Data, and Analysis
Research identifies Bayesian optimization as the most efficient hyperparameter algorithm for predicting groundwater aflaj potential in semi-arid ecosystems, achieving 99% accuracy. The study, conducted in Nizwa, Oman, used machine learning models (SVM and XGB) combined with Sentinel-2, LiDAR, and GIS data to map potential zones into five classes: deficient, low, moderate, high, and very high. Bayesian-XGB outperformed other models (GS-XGB, RS-XGB, SVM) in validation, highlighting its superior efficiency for groundwater aflaj mapping. The findings emphasize the importance of integrating geospatial and machine learning techniques to support integrated water source management (IWSM) programs and protect historical aflaj irrigation systems from threats.
Production and the Exploitation of Resources
Aflaj irrigation systems in Oman represent a sophisticated pre-modern hydraulic technology that sustained agricultural productivity and pastoral economies for centuries. This volume synthesizes archaeological, historical, and ethnographic evidence to demonstrate how Aflaj—gravity-fed underground channels—integrated with broader patterns of resource exploitation across the Islamic world. It reveals their origins in Sassanian water-management traditions, their adaptation under early Islam, and their role in fostering agricultural innovation, including the introduction of new crops like rice. Through case studies from Oman, Iran, Syria, and al-Andalus, the research highlights the Aflaj's dual function: as a tool for sustainable land use and a symbol of imperial and religious authority. Methodologically, it combines textual analysis (e.g., agricultural treatises by al-Hamdani or Al-Falaha) with archaeological surveys (e.g., mining sites in Oman’s southwestern province), offering a multidisciplinary framework to trace the diffusion and impact of Islamic hydraulic technology.
Assessment of Falaj Water Quality
Aflaj irrigation systems, vital to Oman's water supply with 92% used for irrigation and the rest for domestic purposes, face significant contamination risks due to continuous human interventions. A study assessing water quality in Samail, Oman, found that biological contaminants pose substantial health hazards, necessitating proper disinfection measures. The research evaluated physical, chemical, and biological parameters, revealing alarming levels of contamination that could lead to adverse health effects if left unaddressed.
Effect of Climate Change on AFLAJ in the Sultanate of Oman
Climate change is significantly degrading the Aflaj irrigation systems of Oman, primarily through reduced rainfall and increased temperatures. This study reveals that rising temperatures and drought conditions are causing a sharp decline in water availability, leading to soil erosion and loss of green cover in critical areas like the Oman mountains. The research analyzes weather data—including rain and temperature—and evaluates its impact on Aflaj systems by examining hydrographs. It demonstrates how temperature increases affect irrigation demand at varying flow levels (low, average, and high), highlighting a dire threat to these ancient water management systems. The findings underscore the urgent need for adaptive strategies to mitigate climate-induced degradation of Aflaj.
The implications of smallholdings of water and land for the sustainability of a community based water management system in Oman
Oman's traditional aflaj irrigation systems, which have sustained agriculture and livelihoods for centuries, face sustainability threats due to the economic implications of small water and land holdings. A study on one falaj system revealed that these smallholdings prevent farmers from achieving economies of scale, leading to high average costs and low farm profits. As aflaj are community-managed, the low economic value may result in insufficient funds for maintenance, potentially undermining their sustainability. The research highlights a critical challenge for community-based water management systems in arid regions.
Centuries old aflaj irrigation system in Oman
Oman's ancient aflaj irrigation systems, some dating back 2500 years, remain highly efficient and integral to village life despite modern advancements. These systems tap groundwater near mountains, channeling it through a network of mother wells, access shafts, underground tunnels, and surface channels—supported by structures like aqueducts and siphons—to create oases. With an estimated 3000 active networks, aflaj play a significant social role, maintained by village cooperatives with historically rich water rights and distribution practices. Recognizing their cultural and engineering significance, UNESCO designated five key aflaj as World Heritage Sites in 2006.
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