When we moved into our home last year, we knew we would eventually need to plant grass in our backyard. At the time of our move-in, the nature of the challenge seemed remote and manageable. Fresh topsoil had already been installed for us as a part of the home-finishing phase. Seemingly, things would be as simple as planting some grass seed and watering when warm weather came rolling around, right?
Wrong.
Due, in part, to the fact that our home's lot is at a slight incline (climbing toward the street level and dropping toward the backyard), combined with the configuration of our roofline and the resulting redistribution of water around the perimiter of our home, we had a drainage problem sufficient to have washed away our topsoil and carved out some respectable canyons in our backyard by the time the weather began to warm up.
We knew the canyons would only keep growing. We needed some healthy turf established to fend off this sort of unchecked erosion. So, down on our hands and knees went my whole family to pull up the weeds that had begun to take hold, readying the backyard for new soil and a lawn.

Having eliminated the weeds, we called Hill Country Soil & Stone and ordered six cubic yards of "Hill Country Custom Mix" to be delivered by dump truck to our front driveway.

Thankfully, we had the help of my two brothers for a full day of hauling dirt by wheelbarrow into the backyard and raking things smooth. After finishing with the dirt, we stopped to enjoy lunch together, and then got back to work to take care of spreading the grass seed, raking the seed into the soil, spreading fertilizer, as well as getting some stakes hammered in around our three wobbly young trees.
In the coming days, we knew we would need to solve our drainage challenges. Rain was in the forecast. We didn't want to see all of this effort washed away in a single downpour!
The ideal drainage solution would need to be low-maintenance, would be semi-permanent, and would need to successfully route the water over our backyard and into the adjacent field.

I decided to try creating a kind of micro-aqueduct -- a slightly elevated flume that would allow the grass to continue growing while diverting excess water up, over, and out. A Saturday-morning trip to Home Depot revealed the parts we needed. I picked up eight 10\' segments of cheap, vinyl gutter. I also grabbed some 16-gauge wire, some chicken wire, and a plastic painter's tarp.
The "elevators" that would hold the vinyl gutter flume were manufactured from the 16-gauge wire and secured to the flume at certain points using rebar wire. My wife and I stair-stepped the flume to ensure downward flow without excessive leaking.

On the north side of our home, I needed to create an actual dam to stop the flow of water and divert it into the east-running flume. To accomplish this end, I created a frame from the chicken wire, secured the frame to our vinyl fence with rebar wire, punched a hole through it at the lowest ground-level point, framed this hole with duct tape, and then pushed the painter's tarp through the hole and onto the flume and then covered the rest of the frame. I did my best to create an incision into the existing sod along this side of our home, carefully tucking the plastic below the grass-line in the hope of preventing seepage underneath the plastic. I then cut the plastic tarp where it would divert water out into the flume and taped things down in this area with more duct tape. Some rebar wire helped with securing the plastic to the chicken wire frame, and some big rocks helped me feel slightly more confident that the whole contraption wouldn't blow away like a kite.

On the east side of our home, we positioned an additional flume which was intended to catch falling rain from the roofline. Half of the flume would divert water to the north and into the eastbound flume; the other half would drop the water off into the adjacent lot toward the south.

Today, we got hit with our first violent rainstorm. High winds and heavy rainfall put our drainage system to the test. Thankfully, everything worked pretty well, although a few chinks in our anti-aquatic armor were discovered:
- First, the winds driving the rain were violent enough to change the "drop zone" for water coming off the roofline on the east side of the home, limiting the effectiveness of the flume in that area.
- Second, I failed to address a problem with drainage coming off our back patio -- something I will need to look into solving.
- Third, it appears as though the water level may have risen above the "high point" of the dam on the north side of the home, allowing a fair amount of water to get through.
- And fourth, I overlooked the fact that a fair amount of runoff water is entering our yard at the northwest corner from our neighbor's adjoining backyard, so it looks like I'll need to create an elevated basin there to help catch and divert the water into the flume.

So, it looks like we have some fine-tuning ahead of us. I will be sure to post updates, and if all goes well, a first glimpse of Bermuda grass sprouts in the next week or two.