Glossary V - Z
A low area of land between hills or mountains that typically has a river or stream throwing through it.
Communities of plants at a range of spatial scales, from local to global.
A gap in the ground which allows volcanic material to pass through to the surface.
The total volume of water needed to produce a good or service.
A mountain or hill created by the eruption and deposition of lava, rock fragments, vapour, gas and ashes from the Earth's crust through a vent in the ground.
The movement of migrants whom have chose to move out of their own free will.
A valley formed by the action of a river eroding down into a landscape, forming a V shape.
The changing state by which one judges how likely a community or individual is to experience loss as a result of a natural hazard, climate change or other phenomenon.
A neighbourhood which contains around 5,000 people.
A disparity between the supply and demand of water such that the availability of water falls below 1,000 cubic metres per person per year.
A disparity between the supply and demand of water such that the availability of water falls below 1,700 cubic metres per person per year.
The level below which the ground is saturated with water.
A sudden vertical or near vertical fall of water where a river course is interrupted by a drop away in the land over which it is flowing.
An area or ridge of land where drainage basins meet which determines to which basin precipitation will go.
Wave Cut Platform
A narrow and flat rock platform caused when wave action erodes into a cliff causing collapse and retreat.
Wave Energy / Power
A renewable energy source that uses the power of waves to turn turbines and generate electricity.
The state of the atmosphere at a particular place and time.
A boundary formed where two air masses of different temperatures meet.
The disintegration of rocks and minerals on the Earth's surface in situ.
An unsettled, uncultivated region left in its natural condition.
An upward spiralling, dust filled vortex of air.
An instrument for showing the direction of the wind.
An area of land with a group of wind turbines or windmills used to generate energy.
Standards of working conditions established to protect the needs and rights of workers.
World Heritage Site
A natural or man-made area or structure recognised as being of outstanding international importance and therefore under special protection.
World Trade Organisation (WTO)
An organisation that aims to support economic stability in international trade.
Soils with a profile showing a dominant influence of climate and vegetation in its development, as contrasted with an azonal soil.