Watertable control is a way to measure and manage how much water is in the ground. When too much water goes into the ground, it can cause flooding and too little can cause drought. To control the watertable, people look for places where the water can be stored safely and then use pumps to make sure the right amount of water is in the ground. They can add water when there is too little and take away water when there is too much. This way, people can help keep the environment healthy and safe.