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ENVIRSC 1A03 (130)
Luc Bernier (125)
Lecture

Hydrologic Cycle and Water Balance.docx

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Department
Environmental Science
Course
ENVIRSC 1A03
Professor
Luc Bernier
Semester
Winter

Description
ENVIR SCI 1A03 February 12, 2014 Hydrologic Cycle and Water Balance What is the Hydrosphere? • All of Earth’s water. • Ocean – 97% of all water, freshwater – most in glaciers and ice caps, surface freshwater are in streams or lakes. • Hydrologic Cycle o Over the ocean – 86% evaporation, clouds will form and cloud will move from over ocean to land and the transfer between land and atmosphere are going to be balanced. o The movement on the land by slopes balances the net transfer between the atmosphere and the land. Where does Rainwater go on Land? • Water can be absorbed by plants or evaporated = evapotranspiration • Can infiltrate the ground and percolate downward and fill pore spaces and recharge water table and form water table • Move at the surface – runoff as overland flows, inter flow is just beneath the ground surface What is a Water Balance? • Represents: hydrological cycle at the local state • Accounts for interactions with the available energy and moisture at the Earth’s surface • Take into account moisture and latent heat • Take a look at all the energy the system provides – output, input and storage What is the Water Balance Equation?
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