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The combined effects of evaporation and transpiration.
A measure of how close air is to saturation with water vapour.
A measure of the volume of water that will flow through a unit cross-sectional area of rock per unit time, under a unit hydraulic gradient and at a specified temperature: K in the
Darcy’s law equation.
The slope of a water table.
Another name for the water cycle.
Hydrologically effective precipitation
The study of water movement on and beneath the ground, and the physics and chemistry of water.
The parts of the Earth that are mainly composed of water.
The managed watering of crops so they can be grown in areas where they could otherwise not be grown, or to improve the yield.
Fresh water derived by condensation from the atmosphere and which accumulates as surface water or underground water.