Chapter 8 – The Nuts and Bolts of Water Harvesting, Irrigation, and Drainage

 

Rain is free. So why do we pay for water to sprinkle on our lawns while letting rain run down the driveway and into the storm drain?

Chapter 8 gets technical, but don’t let that scare you. Owen Dell explains the “nuts and bolts” of getting water where you want it – and keeping it away from where you don’t.

First, rainwater harvesting. The simplest method is a rain barrel under a downspout. A 50‑gallon barrel fills from a 1,000‑square‑foot roof in just 1/10 inch of rain. Dell provides step‑by‑step instructions for installing a barrel, including adding an overflow hose and a spigot. For serious harvesters, cisterns (250 to 5,000+ gallons) store enough water to get through dry spells.

Beyond barrels, there’s passive harvesting. Grading your yard to direct runoff toward plant beds instead of the street. Creating swales (shallow, vegetated ditches) that slow and soak in water. Building rain gardens – depressions planted with water‑loving natives that filter runoff and recharge groundwater.

Second, irrigation hardware. Dell explains the difference between pressure‑compensating drippers (good for slopes) and non‑compensating (fine for flat ground). He covers filters (essential to prevent clogs), regulators (to lower high water pressure), and timers (mechanical or digital). A full parts list is included.

Third, drainage. Too much water is as bad as too little. Poor drainage drowns roots, breeds mosquitoes, and damages foundations. Dell describes solutions: French drains (gravel‑filled trenches with perforated pipe), dry wells (underground pits that collect and slowly release water), and grading (reshaping the land so water flows away from structures).

The chapter includes a handy troubleshooting guide: “If water pools in the lawn for more than 24 hours, you need soil amendment or a French drain.” Practical, specific, and doable for a motivated DIYer.