What are three ways man can effect an estuary?

1. Dams and Levees: Dams and levees can alter the flow of water into and out of an estuary, which can change the salinity and temperature of the water. This can have a negative impact on the plants and animals that live in the estuary.

2. Pollution: Pollution from sewage treatment plants, factories, and farms can enter estuaries and contaminate the water. This can make the water unsafe for swimming, fishing, and drinking.

3. Climate Change: Climate change is causing sea levels to rise, which can lead to increased flooding in estuaries. This can damage property and infrastructure, and it can also disrupt the natural balance of the ecosystem.