Thursday, March 25, 2010
Proper Drip Irrigation Layout
In Drip Irrigation, For Every Landscape and All Climates, I recommend laying out parallel lines, or “laterals,” of tubing throughout the entire bed. I always stock the 1/2-gph, 12-inch-interval version because I install drip systems for different clients with different types of soil. The 1/2-gph tubing with the 12-inch spacing along the hose’s length is the only one that will water sandy soil. You can have your local irrigation supplier order tubing with 6-inch spacing in the drip hose. Yet, clay-loam soils can also be irrigated by turning on the system for a shorter period of time because the water easily spreads laterally. The parallel lines of tubing might be as close together as 6 or 12 inches in sandy soils and as far apart as 24 inches in heavy clay-loams. If you have a fairly heavy soil and want to save money, buy the tubing with 18-inch or 24-inch intervals between emitters, and you’ll save 25% or 40% respectively. Also, a higher flow rate, such as 1 gph, will help the water to spread wider than with the slower 1/2-gph emitter tubing. At worst, you’ll just have to run the system a little longer to get the wet spots to meet underground along the length of the tubing.
The photo on the left was taken at a winery here in Sonoma County. The one on the right I found at a museum in Paris, France. It's really catching on even though there is no French version of my book, as far as I know!
“BUY FROM THE SOURCE TO HELP KEEP WRITERS WRITING”
Let me know what you think.Visit my web site to learn about my new book on drip irrigation and other gardening books.NOTE: The comments section at the bottom of the post has disappeared. Click on the "___ Comments" button or the title under the "Blog Archives". Thanks, Robert