Scientific framing¶
How water moves through soils — infiltration, redistribution, recharge, evapotranspiration, and runoff — sets the state that all geohazards inherit. This page develops the water-flux and land-surface modeling that turn observations into a physically consistent soil reanalysis.
Water fluxes through soils¶
(Richards-equation / unsaturated flow, retention curves (van Genuchten, see Soil Hydromechanical Memory), partitioning between infiltration, runoff, and ET.)
Land-surface modeling¶
(Land-surface model structure, forcing, parameters; coupling to the atmosphere; how the reanalysis assimilates observations into these models.)
State variables & observables¶
(Soil moisture, water-table depth, fluxes; the observation operators linking them to seismic , remote sensing, and in-situ sensors.)
Evaluation & metrics¶
(Link to HazEvalHub: flux closure, mass balance, validation against ET and streamflow.)