Physical - Ecology, - Navigation, - Sustainable
Physical World - Climate, Topology, Landforms, Geology
Energy & Life - Incoming solar radiation, Kinetic energy, Ecology, Habitat, Flora & fauna
Soil & Water - Structure, Organisms, Water supply, Quality, Pollutants
Human Aspects - Needs and wants, Technical ability, Wisdom and morality. Resources,
Constraints, Hazards. Environmental Impact
History - Hunter gatherer, Agricultural, Pre, Advanced, Post-industrial
Modern Trends - Settlement, Transport and Navigation, Architecture, Land-use, Flooding
Resources - Built, Mineral, Agriculture, Recreation, Leisure, Conservation
River use conflict, Infrastructure, Sustainable development
Administration - Individuals, Organizations, Government (legal, financial) and Management