. Hydrogeologic systems

. Methods of groundwater resources assessment

. Sustainable groundwater resources management

. Natural and artificial groundwater recharge

. Groundwater and Global Climate Change

. Anthropogenic groundwater contamination

. Groundwater-surface water interactions

. Karst hydrogeology

. Hydrogeology of volcanic aquifers

. Snowmelt hydrogeology

. Hydrogeology of arid areas

. Urban hydrogeology

. Groundwaters in peri-urban areas

. Rural hydrogeology

. Transboundary aquifers

. Numerical modeling of aquifer systems

. Anthropogenic groundwater contamination

. Groundwater vulnerability and risk assessment

. Heavy metals in groundwater

. Arsenic in groundwater

. Fluorine in groundwater

. Salt water intrusions into aquifers

. Groundwater salinization

. Epidemiology and public health impacts of groundwater contamination

. Groundwater for irrigation and food production

. Groundwater quality and livestock production

. Geothermal water direct use for development

. Geothermal water use for rural electrification

. Privatization of water resources and water supply

. Hydroeconomics

. Water policy

. Water and education