Topic 1: Environmental Pollution and Prevention
Air Pollution and Control
Biofuel
Energy management
Environmental Education Program
Environmental protection
Environmental risk assessment
Environmental safety regulations
Environmental Sustainability and Development
Green Manufacturing and Technology, Pollution Prevention and Control
Greenhouse effect, global warming, and climate change
Groundwater issues
The impact of industrialization on the environment
The impact of nanotechnology on the environment
Oil leakage
Pollution and health issues
Renewable and non renewable energy sources
Soil Pollution and Control
Wastewater management and treatment
Water Pollution and Treatment
Indoor air pollution 
Management and regulation of point and surface pollution
Topic 2: Hydrology and Water Management
Hydrology
Surface water hydrology
Groundwater hydrology
Watershed Hydrology
Ecological hydrology
Hydroinformatics
Isotope hydrology
Urban hydrology
Agricultural hydrology
Snow Water Literature
The impact of climate change on hydrology
Flood modeling and prediction
Drought modeling and prediction
Hydrological data analysis and modeling
Wetland hydrology
River flow and sediment transport
Water resources management
Water rights and accessibility
Water market economy and policies
Erosion of sedimentary soil
Irrigation
Water resources in arid regions
Groundwater
Urban Water Management
Hydraulic engineering
Reuse and recycling of water
Water Quality and Health
Watershed management 
Flood risk management
Cross border water resource management
The relationship between water, energy, and food
Water Resources Strategy
Restoration and repair of water supply system
Comprehensive water quality analysis
Rainwater management
Water governance and policies
Intelligent Water Management Technology