Lakes are classified in a number of ways to help us understand how they function, make predictions, assess ecosystem health, and establish management strategies or regulations.  They are most commonly classified by the lake’s ability to support plant and animal life, or productivity. They can also be classified based on the water supply, how humans use them, plant and animal communities, or how they were formed (e.g.  glacier retreating, volcanic eruption, made by man).

Rivers and streams are complex. They are filled with a dizzying array of life, from relatively simple bacteria and algae to more complex forms such as plants, insects, and fish. When everything is working well, rivers provide many benefits to society, including fishing and other recreation opportunities, drinking water, irrigation, and transportation. However, there are also many ways that people can disrupt the natural functioning of rivers. For example, it may be necessary for cities to build systems that rapidly remove rain water to prevent flooding damage to homes and businesses.

Have you ever wondered about the water quality in your favorite lake?  Or perhaps you’ve planned a day at the lake only to see a sign that says “Health Alert” and not known what that meant. 

Managing aquatic plants in a pond or lake can be like walking a tight rope, especially in shallow lakes.  When lakes receive excess nutrients, primarily phosphorus in Nebraska, the result can be a dense growth of aquatic plants.  But when too many aquatic plants are removed, water clarity and algae problems may follow.