Bermudagrass is prized for its hardiness, lush growth and relatively low-maintenance nature. As a drought-resistant grass, the bermudagrass species needs just a couple of deep half-inch waterings per week--which averages out to 0.1 to 0.3 inches of water a day--for sufficient hydration. If you are overwatering your bermudagrass, you'll notice several symptoms that the grass is drowning.
Lawn Mower Tracks
Lawns of bermudagrass typically grow in a very dense fashion and spring back quickly when they are driven or stepped on. Overwatering can cause the underlying soil to become compacted, leaving tire marks in your lawn when you drive your lawn mower on it; likewise for footsteps.
Mushrooms and Moss
Both mushrooms and moss require very moist conditions to grow. If you notice mushrooms or moss growing in your bermudagrass, it's time to significantly cut back on the watering. While mushrooms are simply an eyesore and pose no danger to the bermudagrass itself, moss can block out sunlight and compete with the grass for soil space. An immediate treatment with a lawn fungicide can eradicate the problem for the short-term, but only a change in watering practices will prevent moss and mushrooms from returning.
Though a yellowing of your bermudagrass may traditionally be seen as a sign of drought, it can also signify overwatering. Some homeowners may react to yellowing by adding even more water, thereby exacerbating the problem. Determine whether yellowing is caused by drought or overwatering by monitoring your watering patterns. If you know you're giving the grass sufficient water, you may need to cut back a little.
Bermudagrass grows quickly. To support this growth, the grass needs regular monthly fertilizing. If you notice signs of nutritional deficiency--symptoms include straggly growth, bare patches and poor overall turf quality--despite sufficient fertilizing, you may be overwatering. Too much water dilutes and rinses away soil nutrients.