A pre-calibration diagnostic (and a matrix-τ prior) based on the diffusion length L_D = √(K·H·t/S) over the calibration window: matrix recession timescale is only identifiable when L_D is large relative to the basin over the record. Below K ≈ 1e-6 m/s the matrix is hydraulically silent at decadal scales.
Cross-basin evidence: low-K basins (BLR/LSR/Wild Rice/Cottonwood) park matrix τ at bounds; Cannon (productive aquifers, K~1e-4) shows an identifiable matrix-τ decadal trend. Surface this before calibration and feed a prior on whether matrix τ is constrainable.
Depends on #30 (K, H). Full write-up: notes/HANDOFF_K_threshold_diffusion_length.md.
🤖 Generated with Claude Code
A pre-calibration diagnostic (and a matrix-τ prior) based on the diffusion length
L_D = √(K·H·t/S)over the calibration window: matrix recession timescale is only identifiable whenL_Dis large relative to the basin over the record. BelowK ≈ 1e-6 m/sthe matrix is hydraulically silent at decadal scales.Cross-basin evidence: low-K basins (BLR/LSR/Wild Rice/Cottonwood) park matrix τ at bounds; Cannon (productive aquifers, K~1e-4) shows an identifiable matrix-τ decadal trend. Surface this before calibration and feed a prior on whether matrix τ is constrainable.
Depends on #30 (K, H). Full write-up:
notes/HANDOFF_K_threshold_diffusion_length.md.🤖 Generated with Claude Code