EARTHSC 2WW3 Study Guide - Final Guide: Humus, Soil Horizon, Subsoil

62 views6 pages
10 Apr 2012
Department
Professor

For unlimited access to Study Guides, a Grade+ subscription is required.

Jan 9:
10 million km3is what we can actually use
24 million km3of the freshwater in the world is in the form of ice and permanent snow cover
-
Glaciers contain 68.9% of the world's freshwater
-
96% of the glaciers are located in Greenland and Antarctica, 4% are located in glaciers and
mountainous icecaps
-
Frozen Freshwater
Asia
1.
Africa
2.
North America
3.
South America
4.
Europe
5.
Australia
6.
Water scarcity in the US
California
-
Florida
-
Texas
-
Utah
-
States that have a scarcity index of above 1 are:
Exam Review Pt.1
April-10-12
1:18 PM
Water 2WW3 Page 1
Unlock document

This preview shows pages 1-2 of the document.
Unlock all 6 pages and 3 million more documents.

Already have an account? Log in
Utah
-
Nevada
-
Wyoming
-
Colorado
-
Mostly Midwestern states
-
Jan. 16th
Underground water delivery system found in Middle East, North Africa and southwest Asia
-
Still in use today
-
Groundwater is collected from a slope
-
Long tunnels up to 45 km long and connected by several shafts up to 120m deep
-
Uses gravity to deliver water from a higher water source
-
Qanats
Elevated water delivery system made of stone
-
Delivers 1.5 million L of water to Rome
-
Allowed roman cities to grow in size
-
Aqueducts
Drawing water using levers
-
Allowed population growth, which lead the development of irrigation canals to supply egypt
with water from the Nile
-
Shadufs
Oldest known canal was built in Mesopotamia in 4000 BCE and was built to connect cities
-
Another old canal was in North India built in 2600 BCE
-
Finally in Egypt 2300 BCE
-
They were used for irrigation systems for large-scale agriculture
-
Oldest Canals
Blackstone Canal in Massachusetts and Rhode island, between 1828 - 1848 (operated for 20
years powering mills)
-
Canals of North America
Water 2WW3 Page 2
Unlock document

This preview shows pages 1-2 of the document.
Unlock all 6 pages and 3 million more documents.

Already have an account? Log in

Get access

Grade+
$10 USD/m
Billed $120 USD annually
Homework Help
Class Notes
Textbook Notes
40 Verified Answers
Study Guides
1 Booster Class