Quackdown is a term used for the efforts to keep water free from the ducks and other birds that can cause damage to the environment. To do this, people use various methods to scare away or keep the birds from coming to the water. These can include things like setting up scarecrows, noise makers, or things like reflectors that sparkle in the sunlight. People also put up fences or cover the water with netting to make it harder for ducks to land. All these things are done to keep the water free from ducks and other birds, so it is safer for the environment and for people who use the water.