Towards a Correlation between Long-Term Seawater Intrusion Response and Water Level Fluctuations

Laboratory and numerical experiments were conducted to provide a quantitative steady-state analysis of the effect incremental variations water level on saltwater intrusion. The purpose was seek mathematical correlations relating both wedge toe length height along coastline boundary head difference. laboratory completed in 2D sand tank where freshwater seawater levels varied. for two bead sizes having different hydraulic conductivities. model SEAWAT used validate results then perform sensitivity analysis. experimental show that at conditions, logarithmic could be expressed as linear function relationship recorded advancing receding phases. linearity correlation also well demonstrated with analytical solutions. Similar relationships derived scenarios sea fluctuated while constant. found shows regression coefficients sensitive conductivity, dispersivity, density, porosity rate change induced negligible effects. existence between difference evidenced field-scale aquifer all hydrogeological conditions tested. This study is first attempt identifying underlying main intrusion (SWI) external metrics under controlled which great relevance from resources management perspective.