The increased number of flood-control dams constructed on rivers in recent years have created impoundments with physical and biological conditions that are at best poorly understood. A flood-control reservoir does not have normal lake conditions. The most apparent difference is the drastic changes in water level during flood control operations. The great majority of limnological studies have been conducted on natural lakes and the data apply only in a general way to the study of artificial reservoirs. Many of the investigations are concerned with only the summer months. As a consequence, our over-all concept of year-'round ecological conditions in reservoirs is quite incomplete and based on a surprisingly small amount of information. Pennak (1949) listed only ten studies he considered as being complete.
Proceedings of the Iowa Academy of Science
© Copyright 1968 by the Iowa Academy of Science, Inc.
Schmidt, Donald J.
"Plankton of a Variable Level Flood Control Reservoir,"
Proceedings of the Iowa Academy of Science: Vol. 75:
, Article 11.
Available at: https://scholarworks.uni.edu/pias/vol75/iss1/11