Fig. 5. The relationship between total rainfall amount and the change of soil water storage in the soil wetting process at 0-100 cm soil depth at five monitoring sites. (a): Linear regression analysis between total rainfall amount and the change in soil water storage after each rainfall process. The colored dot represents different land-cover monitoring sites. And dashed lines are the linear regression models, showing the regression equations and coefficients of determination (R2 ). (b): Soil water storage variation and rainfall transformation rate at five monitoring sites across all the soil wetting processes. The dashed line with brown diamond icon represents the rainfall transformation rate, which is the ratio of rainwater into the soil.