1. Fresh water source as well as a salt water source2. High population density3. Agriculture4. Semi enclosed coastline
We can use point pollution to determine where these problems are coming from. Greenwich being situated on a part of the Long Island Sound that is not close to the open ocean is therefore at risk of eutrophication.
Build up of nitrogen in areas like Long Island Sound that are more enclosed leads to quicker algae growth.
The Long Island Sound is surrounded by high density areas of more than 5,000 people according to our data (specifically NYC). This would result in more pollution going into the water, acting as one of the causes of eutrophication.
That may all be true, but how does the algae start growing in the first place?
As well as this, according to the CT maps, there are lots of agricultural areas further inland . These areas could contribute more nitrogen to the water in the form of fertilizers and pesticides.
Rivers such as the Housatonic and the Naugatuck transport this nitrogen from agricultural areas inland in the form of run off. This run off will eventually meet the Long Island Sound, where it is deposited.
That may all be true, but how does the algae start growing in the first place? That may all be true, but how does the algae start growing in the first place?
I had no idea! How would the nitrogen cause the algae to grow?
Good question! First, the runoff containing excess nitrogen would be deposited into the Long Island Sound. This excess nitrogen feeds the algae in the water causing it to grow and create a film of green plants on the surface of the water.