Designing a Residential Irrigation System

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1. Designing a Residential Irrigation System

Course visual for Designing a Residential Irrigation System

2. Client Interview

Expectations?

Begin with the end in mind Cost How much do they have to spend?

Can they manage the system themselves.

Cost of power and water

What is the client’s tolerance level for overspray etc. ?

3. Site Plan – Plot Plan

Can be RPR, Aerial photo, drone photo and measurements

Must include property boundaries and http://www.albertageo.com/drupal/?q=services/real-property-reports

From

REAL PROPERTY REPORT

4. Site Plan - Elevations

Lot Grading Plan https://www.edmonton.ca/business_economy/documents/ResidentialGuidelines.pdf

Course visual for Site Plan - Elevations

5. Site Plan

Soil Types texture
Infiltration

Profile (any perch or drainage issues) Environment

Wind – direction and speed Microenvironments – wind tunnels, shade, low areas, slopes (including aspect)

Show drainage patterns (indicate on plan with arrows)

6. How water moves through soil

Course visual for How water moves through soil

7. Site Plan - existing plantings or planting plan

Record all existing plantings or get a landscape planting plan

Note density and anything low to the ground that may inhibit spray pattern

Check what the ground cover is Bare soil?? Mulch?? http://greentreelandscapes.com/ http://www.mcloughlincontracting.ca/#!portfolio

Course visual for Site Plan - existing plantings or planting plan

8. Design Capacity

Check Water Source

Potable Water (drinkable) Note location of the water source

Record the water meter size, service line size Determine the static water pressure

Determine flow rate

Nonpotable Water (dugouts, rivers etc) Check water quality ( may need extra filtration) determine pump capacity

Check Power Source
Location and voltage
Check Local Codes

Type of backflow prevention device Watering windows

9. Other Costs

Time

Has the homeowner requested that you only work at certain times

Is there a tight deadline for the project Are you working with a landscape company or other company

Soil and Water

Is the soil rock or is there other impeding factors like construction debris

Is there a high water table Is the topography extra steep or uneven

Specialty Material

Does the system require a pump or booster pump Is extra filtration needed because of water quality

Do you need to include sleeves to work through hardscapes

10. Sprinkler Layout

start with a straight line, usually the longest measure the width and distance to find the largest sprinkler that will fit without over spray aim for head to head coverage or slightly closer put a sprinkler head in every inside corner add sprinklers to area maintaining head to head coverage as much as possible.

There should be a minimum of 2 sprinklers covering each area. Ideally 3-4

Choose a model of sprinkler that has enough variation in nozzles to supply all sprinklers in one area.

Do NOT mix rotors and spray heads.