[A-GE31] Energy-Environment-Water Nexus and Sustainable Development

[AGE31-P03] Invention of Partitioning Well Pipe to Identify Solute Pathways in Aquifers: Laboratory Sandbox and Synthetic Studies

*Bu-Sheng Lee¹, Jian-Dao Li¹, Hong-Ru Lin², Jet-Chau Wen^3,4 (1.Graduate School of Safety Health and Environmental Engineering, National Yunlin University of Science and Technology, 123, Section 3, University Road, Douliou, Yunlin 64002, Taiwan, 2.Graduate School of Engineering Science and Technology, National Yunlin University of Science and Technology, 123, Section 3, University Road, Douliou, Yunlin 64002, Taiwan, 3.Department and Graduate School of Safety Health and Environmental Engineering, National Yunlin University of Science and Technology, 123, Section 3, University Road, Douliou, Yunlin 64002, Taiwan, 4.Research Center for Soil and Water Resources and Natural Disaster Prevention, National Yunlin University of Science and Technology, 123, Section 3, University Road, Douliou, Yunlin 64002, Taiwan)

Keywords:Groundwater, Solute transport, Three-dimensional, Sandbox, VSAFT3

Groundwater is a primary resource for agriculture, industry and domestic water, that contamination can have long-term negative influences on the environment causing severe disasters. To appropriate program utilization and management of groundwater resources. Therefore, accurate characterization of subsurface heterogeneity in hydraulic conductivity (K) and specific storage (S_s) is required, which are two important hydraulic properties for the construction of groundwater flow models, and in particular, for solute transport simulations. According to previous studies, the spatial distribution accuracy of hydrogeological parameters will directly affect the geological assessment and prediction of solute transport in aquifers. The traditional sampling method consumes construction cost and time, for example, core samples, slug tests, single-hole pumping/injection tests. Therefore, the purpose of this study is to design a multi-stage concentric well pipe, which can measure the water level at different depths in a single well pipe. Subsequent research will use the three-dimensional (3D) sandbox model to simulate the real underground environment for pumping experiments and the distribution field of hydrogeological parameters will be estimated by hydraulic tomography (HT). Finally, Utilizing the VSAFT3 inverse the prior data to estimate the underground heterogeneous field's pollution flow direction, the data from the pumping test. Our study highlights the importance of analyzing the characteristics of groundwater geology parameters with vertical and horizontal. And through the numerical simulation and the real field fitting of the sandbox. It is proved that the partitioning well pipe can accurately estimate the 3D field of hydrogeological parameters and can effectively predict solute transport. This research will significantly contribute to the future analysis of changes in regional flow fields, groundwater replenishment patterns, and control of the diffusion of underground pollution.