Limnology is the study of waters that are not part of the oceans or seas. This includes rivers, lakes, swamps, streams, wetlands, water under the ground, and even bodies of water made by people. Scientists who study this are called limnologists. Their work includes biology, chemistry, physics, geology, and hydrology.The International Society of Limnology promotes limnology to scientists throughout the world. There are many centres for such research throughout the world.