II. WATER
Learning Objectives: In this unit you will learn how to read slope and how water moves by gravity. You will discuss what the hydrological cycle is and its importance in the great web of life. You will learn how to capture water with dams and swales, how to recharge groundwater systems, how to move earth in order to construct earthworks such as ponds, lakes and dams, how to identify the keyline in a landscape, how to asses and construct wetlands for water purification, what kind of vegetation helps to purify water, what to plant in and near swales, ponds, and lakes, how to utilize gray water in orchards and fields, and when the use of septic, leach fields and wells are appropriate. Most of all you will learn that all water used in the landscape and for personal use can be purified and recycled for further use. Water rights and usage are becoming a major issue in the world today: what are these current issues?
A. Regional intervention in the water cycle
1. What is the hydrological cycle?
2. What is the chemical makeup of water?
3. What are the many uses and abuses of water?
B. Earthworks for water conservation and storage
a. Keyline system
b. Dams and earth tanks
c. Swales
d. Ponds and lakes
e. Diversion banks and drains
f. Earth moving equipment and construction
C. Sewage systems and composting techniques (toilets, compost piles, etc.)
D. Purification of polluted waters
E. Grey water
F. Natural swimming pools
G. Wells
H. Septic and leach fields
I. Wetlands for water purification
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