Hydrologic Cycle. Water is Ubiquitous!. Biosphere- Water Cycle. Hydrosphere Liquid waters of earth. 1. Oceans 2. Lakes 3. Streams 4. Glaciers. Atmosphere Layer of gases surrounding earth. 1. Clouds 2. Vapor. Earth is a closed system:.
The water available on Earth , today, is the same water that has always been available and the only water that ever will be available!
≤1 % of Earth’s water is available for the following:
How the water is divided among:
Proportions of water
stable on Earth. Only the distribution differs (tropical vsdesert).
The actual path any given water molecule follows in a complete water cycle can be varied and complex and may not follow the exact path shown by a diagram.
From Atmosphere to Surface
From Surface to Atmosphere
Sublimation: from solid to gas without melting.
Snow or ice vapor
From liquid to vapor
Latent energy: hidden
Latere- (Lat.) to lie hidden
A mass of liquid droplets or frozen crystals.
1. Earth’s water transportation system.
in conjunction with wind
2. Determine how much of earth energy is absorbed.
block solar rays
3. Alters temperature of air on earth’s surface
traps heat on the surface
Evaporation: only the water molecules leave the surface; the dissolved salts and other solids remain behind in solution.
Condensation: when the water vapor condenses again it is pure. It may become contaminated as it falls through the atmosphere: sulfates and nitric oxides( NOx) cause acid precipitation.
Water droplets coalesce to form precipitation.
Gravity pulls it to the earths surface.
Interception: falls on leaves or stems of plants.
Percolation: moves down
into the soil and
Runoff: does not infiltrate soil but travels across the surface of land.
Together ground water and soil water make up .5% of freshwater.
Vadose: soil moisture
Water table: divides the 2 zones.
Aquifer- body of earth material that has the ability to hold and transport water.
Recharge zone- where confined aquifer is exposed at the surface.
Seepage:ground water flows to a stream channel, lakes, and wetlands
Hydraulic conductivity- the measure of the ability of a material to transport water.
The amount of water on earth remains constant.
World population- 7.111 billion & growing
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