← Water
H04-04 · Module 4 of 7 · Pages: 20 · Worksheets: 7
Drip and gravity-fed irrigation
From water butt or well to the dripper: parts, pressure, gravity, working out flow and run time, laying out, upkeep and winter
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In short
- A filter is not optional. Without one, drippers clog in the first season.
- 10 m of height = 1 bar (14.5 psi). A water butt raised 1 m gives only 0.1 bar: it works, but only with short runs and low-pressure tape.
- Measure the real flow of one dripper (a cup and a clock) before you work out run times.
- Less often and longer beats a little every day: moisture should reach 20–30 cm (8–12 in).
- Before the frost, drain the system and store the tape under cover.
What's inside
Chapters
- Why drip
- Parts of the system
- Pressure and gravity
- Working it out: flow and run time
- Line layout by crop
- Laying it out step by step
- Checking soil moisture and scheduling
- Maintenance and problems
- Winter
- Most common mistakes
- Printable checklist
Worksheets
- Drip calculator
- Flow measurement
- Zones and run times
- System sketch
- Watering log
- Drip irrigation calendar
- Shopping list
Fields and checkboxes can be filled in with Adobe Acrobat Reader (desktop and mobile), and the calculator adds up by itself. Filling in may not work in some browsers. A print version comes with the screen PDF.
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