15:00 〜 15:15
[AHW25-06] Use VSAFT2 to evaluate the impact of stimulus source changes on hydraulic parameter back-calculation under different sandbox boundary conditions.
キーワード：back-calculation, VSAFT2, different boundary conditions
This study conducted numerical experiments in a laboratory sandbox filled with soil, where different boundary conditions were established under a natural gradient. A pumping test was performed to collect discharge data, which was then used to derive hydrogeological parameters. These parameters were combined in various ways for back-calculation and verification.
Among 45 sets of pumping test data, odd-numbered wells were used for back-calculation with the VSAFT2 model, while even-numbered wells served as a verification group. One boundary condition was selected, and stimulus source conditions were introduced into the model. Back-calculation was first performed using unaltered data to simulate both the real parameter distribution field and the estimated parameter distribution. Errors and correlations within and between back-calculated parameter fields were analyzed to assess accuracy.
The experimental data were simulated using VSAFT2 and analyzed with its back-calculation model to evaluate the impact of stimulus source changes on hydraulic parameter estimation under different boundary conditions.
Among 45 sets of pumping test data, odd-numbered wells were used for back-calculation with the VSAFT2 model, while even-numbered wells served as a verification group. One boundary condition was selected, and stimulus source conditions were introduced into the model. Back-calculation was first performed using unaltered data to simulate both the real parameter distribution field and the estimated parameter distribution. Errors and correlations within and between back-calculated parameter fields were analyzed to assess accuracy.
The experimental data were simulated using VSAFT2 and analyzed with its back-calculation model to evaluate the impact of stimulus source changes on hydraulic parameter estimation under different boundary conditions.