University:
Bradley University
Course:
GES 101 | Principles of Earth Science
Academic year:

2024
Views:

118

Pages:

18
Author:

Gudrunecg9m

Chapter 11 Water Water  Two kinds  Salt water  Freshwater  We can only live a few days without water, but we can live a month without food The water cycle  Continuous movement of water between earth and its atmosphere  Is water a renewable resource? Global water distribution  What percent of earth is covered by water?  About two thirds, or more specifically 71%  What percentage of that water is salt water?  97%  So 3% of water on earth is fresh water  Most of this is ICE (77%)  A lot is GROUNDWATER (22%)  Less than 1% is SURFACE WATER (that we can drink)! Chapter 11 Water   Fresh water on Earth’s land surface ◦ Remember we said less than 1% of Earth’s water is surface water! Sources of fresh water in the form of surface water include : ◦ Rivers ◦ Streams ◦ Lakes  A flowing network of rivers and streams draining a river basin ◦ Other rivers and streams flow into other rivers and streams…making a larger river.   The area of land that is drained by a river Biggest in the US in the Mississippi    Most of the freshwater available for human use cannot be seen – it exists underground When it rains some water goes into the streams and rivers, but most of it percolates down through the soil and into the rocks below This water is called groundwater  As you travel down through the earths surface, eventually you reach a point where the soil is saturated with water, this is the water table.    Aquifer: underground formation that contains groundwater Porosity: the percentage of total volume of a rock that has spaces (pores) Permeability: the ability of rock or soil to allow water to flow through it  An area of the Earth’s surface from which water percolates down into an aquifer

Chapter 11 Water

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