The soil moisture content at deeper depths is important for global water balance calculations. While recent developments of remote sensing technologies seem more tractable for estimating the soil moisture content (SMC) of relatively shallow depths (0~5 cm) over large land areas, numerical variably-saturated flow modeling provides an important tool for extrapolating surface SMCs to deeper depths. In this paper we will show the results of HYDRUS model simulations at several locations across the SGP97 region. HYDRUS is based on the one-dimensional Richards equation for variably-saturated flow, and the van Genuchten functions for soil water retention and unsaturated hydraulic conductivity. The model can handle both flux- and head-type boundary conditions, root water uptake, and temperature dependent as well as hysteretic soil hydraulic properties. Furthermore, HYDRUS has the option of incorporating scaling factors to address spatial variability of soil hydraulic properties across large land areas. During SGP97 we collected gravimetric soil moisture data at deeper depths (up to 1 m) at several locations using a truck-mounted Giddings probe (please see the companion paper by Houser et al.). Atmospheric forcing such as transient precipitation (flux) provide the top boundary condition for water flow simulation in one-dimensional soil pedons. Observed gravimetric SMC data will be used to test the model predictions.