In metropolitan cities like Chennai, understanding the subsurface environment is critical for effective urban growth and infrastructure planning. Also, subsurface models with clear distinctions of various layers are beneficial for geotechnical analysis and the successful execution of engineering projects. Borehole data serve as the primary source of information that can yield valuable insights into the underground conditions of the Earth. However, accessing this data can be challenging due to its extensive and diverse nature. In this study, a digital information system has been built using collected borehole data that acts as a repository for storing borehole information, including stratigraphic characteristics and other geotechnical parameters along the depth. The database also facilitates data integration, visualization, retrieval and analysis within a GIS framework. Using interpolation techniques and geostatistical methods, maps of subsurface layers and a 3D subsurface model are developed, highlighting the spatial distribution of various soil and rock layers at various depths. These models effectively depict the subsurface conditions, providing valuable insights into geological variations that assist in decision-making for urban planning, infrastructure projects, and environmental risk assessment. This framework is then incorporated into the website, enabling the locating of the boreholes across various regions of Chennai and facilitating an understanding of subsurface conditions before the commencement of the project, which allows for informed site selection, effective foundation design, and sustainable urban development.
Priya et al. (Thu,) studied this question.