|1. Description - |
|Principles of irrigation design for ornamental landscapes. Includes history of irrigation, advanced site analysis, irrigation design theory, equipment selection and layout, controller scheduling, long-term maintenance, and water conservation issues. Process of producing irrigation plans, details, and specifications. This course is intended for students in the horticulture program but members of the public and professional community are invited to enroll.|
|Advisory: HORT 54C strongly recommended.|
|2. Course Objectives - |
|The student will be able to: |
- demonstrate knowledge of irrigation theory (including hydraulics), integration of system components, and scheduling
- develop an irrigation plan for a residential or small commercial irrigation system.
- write irrigation notes and demonstrate knowledge of specifications utilized on irrigation plans.
- interpret irrigation drawings, details, and specifications.
- demonstrate an understanding of irrigation system scheduling.
- compare and contrast the differences between various types of irrigation systems.
- describe water conservation measures for irrigation systems including state, county, and city water use ordinances (AB 325).
- exhibit an understanding of cost estimates for irrigation systems including parts used and labor costs.
- identify the global applications of irrigation systems and the cultural implications of using different systems.
|3. Special Facilities and/or Equipment - |
|Design lab, horticultural facilities and equipment. Students provide architect's and engineer's scales, drafting supplies (including irrigation template), term project base sheet, and small calculator. |
|4. Course Content (Body of knowledge) - |
- History and design of irrigation systems around the world
- Site analysis procedures and irrigation audits
- Design considerations
- principles of hydraulics (GPM, PSI, static water pressure, etc.)
- selection of spray heads and rotors for different circuits
- drip irrigation
- water conservation techniques (hydrozones, product selection, etc.)
- regulatory factors (AB 325)
- innovations in irrigation design
- Irrigation system design and layout
- Rough, preliminary, and final working drawings
- Irrigation symbols and legends
- Cost estimates
- Selection of equipment and materials
- Sprinkler systems (sprays, impact heads, and rotors)
- Drip systems (surface drip systems, subsurface drip systems, fixed line drip systems)
- Backflow preventers
- Pressure reducing valves
- Circuit valves
- Planning for long-term project maintenance
- Scheduling controllers
- calculating and scheduling circuit run times
- selection of features to suit design
- Observation process during installation
|5. Repeatability - Moved to header area.|
|6. Methods of Evaluation - |
- Midterm exam
- Weekly exercises
- Term project
- Participation in class activities
|7. Representative Text(s) - |
|Melby, Pete, Simplified Irrigation Design, 2 ed. New York, NY, Van Nostrand Reinhold, 1995. |
Rainbird.Irrigation Design Manual, Asuza, CA, Rainbird, 2001.
The Rainbird Irrigation Design Manual is the most complete and sequential text available. Simplified Irrigation Design has not been updated since it was published but also is the only one with adequate photos and sequential text that presents both irrigation components and irrigation design issues in a clear, concise way.
|8. Disciplines - |
|Environmental Horticulture & Design |
|9. Method of Instruction - |
- Oral presentations
|10. Lab Content - |
- Hydraulics lab: In this lab each student will look at two or more sites to collect information on site hydraulics.
- Irrigation design labs: A series of labs with short exercises and term projects. Students will work both individually and in teams to solve irrigation design problems.
- Sprinkler spacing lab: Multiple labs designed to assist student with the proper placement of sprinklers.
- Drip irrigation design lab: Multiple labs designed to assist student with the proper placement and application of drip products.
- Valve & line circuit layout lab: Labs to assist students with the techniques for placing irrigation lines, sizing the lines, and locating and sizing the valves.
- Scheduling lab: Lab provides instruction on how to calculate run times for individual irrigation circuits.
|11. Honors Description - No longer used. Integrated into main description section.|
|12. Types and/or Examples of Required Reading, Writing and Outside of Class Assignments - |
- Reading assignments will include reading approximately 35 pages per week from the assigned texts with supplemental reading from a course reader. Out of class reading/assignments is approximately 5 hours.
- Lectures will address reading topics and experiences of the instructor. Classroom discussion and demonstrations in support of lecture topics will be provided.
|13. Need/Justification - |
|This course is a restricted support course for the AS degree and Certificate of Achievement in Environment Horticulture & Design. |