Numerical modeling of complex, integrated hydrologic systems, including coupling distributed rainfall-runoff models with groundwater models and surface water-groundwater interactions. Sensitivity analysis, parameter estimation, prediction, and uncertainty evaluation in complex environmental systems. Using hydrological models to determine total maximum daily load (TMDL) and transport of sediments, metals, and bacteria in streams. Global change: effects of climate change and human impact on water resources, with main focus on groundwater depletion, and freshwater ecosystem conservation. Managed aquifer recharge and solution to water scarcity problems in arid and semi-arid countries. Food-energy-water nexus.
