ABSTRACT
The soil water characteristic curve (SWCC) is an important property for simulating infiltration behavior, and several methods exist for its estimation. This study aimed to investigate the relationship between the SWCC estimated by data assimilation based on field measurement data and that estimated using the pressure plate method (a water retention test). Simulations using the SWCC estimated by data assimilation reproduced 5 days of trained field measurement data and predicted 50 days of unlearned test data with sufficient accuracy. The SWCC estimated by data assimilation had a different shape than that of the SWCC estimated using the pressure plate method.
