Water's Path: Designing Your Landscape with Expert Drainage Solutions

Choose the discharge before you commit to the trench. A drain can collect water exactly where you want it and still fail if the outlet is too high, blocked, or placed where the water creates another problem.

We look at the whole route: collection, conveyance, and discharge.

Start with elevations

Water flows because of differences in water level. For a gravity system, the relationship between the collection area and the outlet has to let water leave. A low spot in the yard is not automatically a usable outlet, and a pipe that simply points downhill on a drawing may have an uphill section in the ground.

We measure the available elevations and check the route around roots, utilities, structures, and existing drainage. The pipe alignment should be smooth and flat to downhill as the design requires, without unintended humps or sags.

There isn't one slope number that solves every yard. The available fall, pipe, water source, and discharge conditions have to work together.

Think about what happens outside the pipe

An outlet needs a receiving area that can accept the water. Discharging beside the same wet spot defeats the purpose. Concentrating water on an eroding slope can create a washout. A pop-up emitter is a discharge component; it isn't unlimited storage or a guarantee against flooding.

Check the outlet's location, surrounding grade, accessibility, and the downstream path. Connections to existing storm drainage also require checking suitability and permission rather than assuming that any nearby inlet is available.

What if gravity won't work?

Sometimes the collection point is too low for a suitable gravity outlet. Digging the collection trench deeper doesn't create more fall to an outlet that stays at the same elevation.

An exterior pump can lift collected water to a workable discharge route when that fits the site. That adds equipment, power dependence, and maintenance. Another route or a grading adjustment may offer a better tradeoff, so those options belong in the assessment.

Keep the discharge serviceable

Leave a way to inspect the outlet. Watch for sediment, overgrown grass, displaced fittings, or erosion. An outlet that worked at installation can become restricted later.

Before hiring someone or starting a DIY installation, ask them to show where the water exits and explain why that elevation and receiving area work. That answer matters as much as the pipe in the trench.

Need help with exterior drainage in the Charlotte area? Call Drain My Lawn at 704-489-3444 or visit www.drainmylawn.com.