Verification of experimental saltwater intrusion interface in unconfined coastal aquifers using numerical and analytical solutions

Saltwater intrusion (SWI) is a widespread environmental problem that poses threat to coastal aquifers. To address this issue, research employs both numerical and experimental methods study saltwater under the impact of sea level rise varying freshwater boundary conditions in two homogeneous The compares transient groundwater heads salt concentrations results receding-front advancing front conditions. In low permeability aquifer, root mean square error 0.33 cm R2 greater than 0.9817. Similarly, high 0.92 0.9335. also ten tests for steady-state wedge toe length with seven different analytical solutions. are then compared these solutions find most suitable equation. Rumer Harleman equation shows good agreement wedge, while Anderson fit length. Overall, provides valuable insights into aquifers, findings can be used inform policies management strategies mitigate negative impacts intrusion. investigation shed light on how inland water head Sea Level Rise (SLR) affect SWI behavior.