Global water
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Global Water. Science Research & Exploration Spring 2010. Global Climate Zones. Population density. http://earthtrends.wri.org/text/population-health/map-192.html WRI, 2000 based on CIESIN 2000. Water Scarcity Index. http://maps.grida.no/go/graphic/water-scarcity-index

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Global Water

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Global water

Global Water

Science Research & Exploration

Spring 2010


Global climate zones

Global Climate Zones


Population density

Population density

http://earthtrends.wri.org/text/population-health/map-192.html

WRI, 2000 based on CIESIN 2000


Water scarcity index

Water Scarcity Index

http://maps.grida.no/go/graphic/water-scarcity-index

Philippe Rekacewicz (Le Monde diplomatique), February 2006


Water trivia

Water Trivia!

Where is the wettest place on earth?a) Mt. Waialeale, Hawaii b) Mt. Kilimanjaro, Tanzania

c) Amazon Forest, Brazil

Where is the driest Place on Earth?

a) Death Valley, California b) Atacama Desert, Chile

c) Sahara Desert, Africa

How much rain does Los Angeles normally get every year?

a) 50 inches b) 25 inches c) 15 inches

How much water does the average person in Los Angeles use each day?

150 gallons b) 500 gallons c) 40 gallons

How much water does a person normally use for a 5 minute shower?

a) 35 gallons b) 100 gallonsc) 5 gallons

Which group uses the most water in the western U.S.?

a) Urban Cities b) Industry c) Agriculture


Global water

What is a watershed?

Watershed Boundary

Drainage

Outlet

Definition?

A watershed is the land area where water collects and drains through a single outlet.

It can drain onto a lower level property or into a river, ocean or other body of water.


Global water

Collect

Process and store

Transport

Functions of watersheds

  • Water

  • Sediments, soils

  • Dissolved minerals, metals, nutrients

  • Biological material


Watersheds have inputs and outputs

Inputs = water coming into the system

Outputs = water leaving the system

What are some of the inputs?

What are some of the outputs?

Inputs – Outputs = Change in Storage

(think bank account, without interest!!)

Watersheds have inputs and outputs


Los angeles region watersheds

Los Angeles Region Watersheds

Ballona WS


Global water

Ballona

Watershed

130 sq. miles

Land use:

64% residential 8% commercial 4% industrial

17% open space


Global water

Which type of watershed are we in?

Where do you expect to see more pollution?


Effects of urbanization

Effects of Urbanization

Water budgets helps us evaluate sensitivity to change!


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