Alleviating water scarcity in semi-arid catchments using trench-recharged subsurface dams:

Abstract

Water scarcity is a pressing global challenge, particularly in semi-arid catchments where the availability of water resources is limited. This research focuses on addressing water scarcity in the semi-arid catchment of Lokok through the innovative approach of trench-recharged subsurface dams. The proposed solution draws inspiration from Zekai Sen’s (2023) design aiding the recharge of these dams by use of trenches. This design is viewed as potential to enhance higher yield from subsurface dams while reducing the impact of flood waters downstream. The primary objective of the study is to assess the spatial extent of water scarcity alleviation in Lokok Catchment through the approach of trench-recharged subsurface dams. This report begins the first chapter by presenting the background of water scarcity in semi-arid regions, emphasizing the need for sustainable and effective solutions such as subsurface dams. The problem statement further explains this challenge in the Lokok Catchment. The chapter then proceeds to the main and specific objectives of the study, justification, and scope which covers the conceptual, geographical, and time scope of the study. The study employs a comprehensive methodology encompassing details, methods, and recommendations from the literature reviewed, research questions, and practical activities to achieve the specified objectives. The research explores the intricacies of trench-recharged subsurface dam design in the Lokok Catchment. Results include insights into the effectiveness of trench-recharged subsurface dams in the Lokok catchment, validated through the assessment of specific objectives. The research is anticipated to contribute valuable knowledge to the field of water resource management by offering a sustainable solution to alleviate water scarcity in semi-arid catchments and providing a roadmap for the design of trench-recharged subsurface dams as an innovative strategy for water resource management in similar regions.