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ASEAN Journal on Science and Technology for Development

Abstract

Engineering geology and Hydrogeology play a crucial role in the development of urban areas. Without a thorough geological and hydrogeological understanding, urban development can be risky and prone to numerous challenges. In this study, we aim to conduct engineering geological and groundwater mapping of Brunei utilizing data from 614 sacrificial investigative boreholes drilled over the course of 40 years for geotechnical investigation and housing development. Borehole parameters such as soil data, SPT N-values, depth to groundwater and surface elevation were gathered and evaluated. Soil investigation in the study area revealed predominantly clayey sediments with SPT N-values ranging from 0 to 50 and an estimated undrained shear strength ranging from 0 to 625 kN/m2. Our findings show that the groundwater level is generally shallow, with a mean depth value of 2.35 m below ground level. Furthermore, groundwater discharge rates along Brunei’s coastline into the South China Sea of 0.04 to 1.31 m3/m2/d were estimated. This study has presented a novel dataset of engineering geology and groundwater for Brunei, and it may serve as a basis for future urban planning in the country, and the wider region of Northwest Borneo.

Keywords

Urban Planning, Engineering geology, Groundwater, Shear strength, Groundwater Depth

Publication Date

2025

Received Date

26/07/2024

Revised Date

14/01/2025

Accepted Date

24/01/2025

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