Abstract:
HYDRUS-2D was used in simulating water flow and nutrient (nitrate and phosphorus) transport
through soil profile from entrenched waste water treatment works sludge under four different application
treatments. The objective was to simulate nutrient migration processes with conceptual simplifications of the
inputs to the model based on field evidence, soil survey data and applicable literature. Hydrological modelling
of the system require the relationship between the soil moisture content (θ), soil water potential (h) and saturated
hydraulic conductivity (Ks). Model application indicated that, the simulated water flow in soil profiles over the
monitoring period compared favorably to measured observed soil water contents. However, simulated nutrients
transport indicated generally poor direct correlations with measurements but responses of the simulation and
observations are similar and the similarities are true for the range of depths simulated in each profile
