Flooded driveways can be very annoying. Besides getting out of your car to be splashed by water all over, they contribute to building damage. If the flooding occurs regularly, your compound will eventually have mold, wood rot and mildew. Here are five tips to help you rescue your driveway from constant flooding.
Create a Channel Drain
Creating a channel drain in your asphalt pavement near the entrance of the house or garage helps capture excess runoff and drive it away to a safer place. In order to create an effective channel drain, you will have to dig into your pavement to form a two to three-inch-wide trench with a length equaling that of the driveway. Once you create the trench, fill it with mortar and cover it using a drain cover. Run plastic pipes through the trench to guide excess runoff into a public storm water system or into a storage tank.
Install a Swale
A drainage swale performs the same function as a channel drain. The only difference is that instead of digging a trench on the pavement, you create a wide shallow ditch adjacent to the driveway to funnel excess runoff. The swale will guide excess water from the pavement and building to the streets, storm water systems or underground dry wells. The slope of the ditch should be two inches for every 10 feet. The side flares should extend three to four times more than their height. Also, the first 8 inches of the wale should drain water faster than other areas.
A permeable driveway combines beautiful design and water runoff management into one. It contains voids that allow water to pass through and drain into the ground. It considerably controls runoff and reduces the likelihood of flooding. Permeable pavements are made by removing the topsoil and replacing it with stone and other materials that can contain water. Unlike channel drains and swales, permeable driveways require a lot of skills and expertise to install. It is wise you hire a qualified permeable driveway installer instead of working on it on your own.
Install a Rain Garden
Most of the water that flood the driveways come from the surrounding landscape. You can reduce the amount of water that reaches your driveway by installing a raingarden. When creating a rain garden, make sure you place plants that can tolerate wet soil at the center. The plants at the edges will drain more quickly as the ones at the center continue to be submerged. Use native plants since they do not require a lot of watering during dry periods.
Go for a Better Pavement Design
If installing a channel drain or swale does not work, then you need to replace the upper layer of your pavement. Make sure the new design has proper measurements that can help reduce flooding.
You don’t have to deal with flooded driveways every now and then during wet periods. You can replace the existing driveway, create a drain channel and swale or install a permeable pavement. All these options can effectively control flooding.