Avoid Water Runoff With Cycle and Soak

Have you ever seen water dribbling off a lawn onto the pavement or into a gutter? The sprinklers are likely still running, but the yard isn’t absorbing the water anymore. It’s frustrating, right? All that water being used, but it’s not going where it’s supposed to: the yard. This is called runoff, and it's a waste of water.

How do you avoid water runoff?

The best way to avoid runoff* is with a technique called cycle and soak!

Cycle and soak is a technique developed to avoid water runoff, making your water use more efficient, and making sure your yard gets the moisture it needs. The basic idea is to break up your irrigation into two or three parts in order to allow the dirt to better absorb the water. This has a few key benefits:

• It allows your grass or plants to properly absorb the water.
• It promotes root depth, which makes your yard more drought and disease resistant.

Using the same metaphor that we used in our MAD article, imagine that your yard is a dense sponge. When you pour water onto a sponge, it takes time for the water to work its way through the entire sponge. And you need the water to get through the entire sponge, because you want all of your roots to have water!

By breaking up an irrigation session into shorter parts, this lets the water work its way through the entire sponge, making room for the second or third cycle of water to follow. It also allows the water to get deeper into the soil.

How do you calculate how long each cycle should take?

The short answer is that you need to know the density of your sponge, and that depends primarily on what type of dirt you have. For example, sandy soil absorbs water very quickly, but clay soil does not, and there is a wide range of soil in between. An irrigation professional can easily tell you what type of soil you have, and it’s great to know on a zone by zone basis. Most professionals would be happy to do an audit of your landscape in order to determine this info, and make sure the rest of your irrigation system is optimized.

Your soil type, plus the type of plant being watered, plus a few other factors, determines how long the irrigation session should last. For example, one zone might need 45 minutes in one session. With cycle and soak, this would get broken into 2 or 3 different sessions, perhaps 15 minutes of watering followed by a 30 minute rest, then another 15 minutes of watering, then another 30 minute rest, then the final 15 minutes of watering. This allows the water to truly soak the landscape, without runoff.

If you would like to know how Rachio incorporates Cycle and Soak, and all the variables that come into play, please check out our support article on Smart Cycle.

* Assuming that your sprinkler heads are pointed where they are supposed to!