Geographic Information System (GIS) and Remote Sensing (RS) in environmental and resource management, mapping, climate change risk, and vulnerability assessments; land use planning, watershed management/planning, and land use change analysis; LiDAR data processing and analysis for flood hazard mapping, landscape assessments; DEM assessments; agent-based modeling for landslides, adaptation responses, and vulnerabilities; indigenous knowledge and practices on agriculture and environment; environmental and ecological modeling below and above-ground tree-crop interactions in agroforestry systems; nutrient dynamics and hydrologic functions of agroforestry systems; information and database development, management and programming