Great Lakes Areas of Concern rivers, and oceans causing pollution and buildup of sediment. Nonpoint source pollution is said to be the most problematic and hardest to reverse of the types of pollution because it is so hard to regulate and pinpoint where it originates. Many experts agree that nonpoint source pollution is the biggest concern facing the Great Lakes. With the increase of urbanization, a toll has been taken on the lakes in these areas. Lakes that once had stable ecosystems with the appropriate amount of plant life are now full of massive amounts of plants and algae that have been fed by excess
Rivers and lakes of Armenia ones include the Dzoraget and the Pambak. The following table is the list of the biggest rivers in Armenia: Armenia has one very large lake called Lake Sevan and more than 100 small mountain lakes. None of them, except Sevan and Lake Arpi, have yet been extensively studied. The water resources of the lakes amount to about , Sevan holding most of this, nearly (before the drainage it had almost ). At the country's capital, Yerevan, it is possible to find small lakes, often in amusement parks. Rivers and lakes of Armenia The Rivers and lakes in Armenia are mainly