Adaptation studies of the European Union Water Framework Directive in water resources of Ethiopia: The case of the Rift Valley Basin

Sustainable water resource management has become a global priority in response to increasing threats of water scarcity and pollution. The European Union (EU) Water Framework Directive (WFD) provides a comprehensive framework for the protection and improvement of water ecosystems. This study examines adaptation studies of the potential alignment of Ethiopia's Rift Valley Basin (RVB) with the principles and standards set forth by the EU WFD and proposes region-specific management programs. The Rift Valley Basin faces severe pollution threats due to intensive agricultural activities, domestic wastewater discharge, land use changes, and livestock farming. This research adopts an approach based on the principles, methodologies, and key elements outlined in the EU WFD. Data were obtained from national and international institutional databases, Geographic Information System (GIS)-based mapping systems, and satellite imagery. The delineation of the study basin, its classification, and the calculation of land use parameters within the basin were carried out using ArcGIS 10.2. The study was further supported with both numerical and spatial analyses, employing remote sensing data and models used in the digitization of topographic maps.The study focused on adapting surface water resources to the EU WFD framework, classifying water bodies based on hydromorphological and ecological typologies, and conducting a pressure-impact analysis to quantify pollution loads. Subsequently, short-, medium-, and long-term action plans were developed to safeguard water resources, and pragmatic strategies were proposed to mitigate pollution and promote sustainable water management. The pressures on the basin were identified, and sector-specific pollutant parameters, including Total Suspended Solids (TSS), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Nitrogen (TN), and Total Phosphorus (TP), were analyzed. The findings indicate that domestic, livestock, land use, and agricultural activities are the major pollution sources in the basin. In terms of total pollution load, COD from domestic activities holds the highest value (45.4%), while TN emerges as the dominant component in the land use and agricultural sectors, accounting for 98% and 97.1%, respectively. Regionally, the Dugda area has the highest share of total domestic pollution load (18.4%), followed by the Adami Tulu Jido Kombolcha region (17.1%). This study has presented the development of short-, medium-, and long-term programs of measures (PoM) to enhance the water quality and ecological status of the Rift Valley Basin. In the short term, improvements in wastewater management and treatment systems are recommended. In the medium term, the promotion of sustainable agricultural practices should be prioritized. In the long term, water management policies should be aligned with the EU WFD framework. This research provides a strategic roadmap for the integration of the Rift Valley Basin into the EU WFD standards. Reducing pollution pressures, improving wastewater management strategies, and implementing sustainable water management plans are crucial for achieving good ecological status and enhancing water quality in the RVB. The findings of this study serve as a model for the Rift Valley Basin, its sub-basins, and similar ecosystems, contributing to the development of effective water management policies in developing countries.