A world-class institute of changemakers in the deaf and signing community.
Since 1864, we have been investing in and creating resources for deaf and hard of hearing children, their families, and the professionals who work with them.
Over 50 degree programs, with online and continuing education for personal and professional development.
Innovating solutions to break down barriers, and using science to prove what does and doesn’t work.
We make it easy for you to apply and enter here.
Ready to take the next step toward a college education?
Make lasting memories and grow in ways you never thought possible.
Chair: Caroline Solomon, Ph.D. Hall Memorial Building, N318
(202) 250-2370 (videophone)(202) 651-5385 (voice)
Freshwater lakes and reservoirs, precious resources under tremendous stress, go through a natural eutrophication process, which can be accelerated by development and pollution in the watershed. As more nutrients enter the freshwater system, algae increase, causing the water to become cloudier, warmer, and the dissolved oxygen concentration is reduced. As a lake/reservoir's water quality can be in constant change, monitoring its water quality to maintain its desired state is essential.
The trophic state index (TSI), developed by Dr. Robert Carlson, is used to measure water quality of a lake or reservoir. It has four general states: oligotrophic, mesotrophic, eutrophic, or hypereutrophic. Students working with Dr. Lundberg determine the TSI by three parameters: water clarity, chlorophyll-a, and total phosphorus. The water clarity is determined by a Secchi disc, the chlorophyll-a by a fluorometer, and the total phosphorus by a UV-Vis spectrophotometer after acid digestion. Dissolved oxygen/temperature profiles are also created.
Dr. Lundberg's project began in collaboration with Dr. Daniel Downey at James Madison University, providing reports on Shenandoah Valley and George Washington National Forest reservoirs to the Virginia Department of Game and Inland Fisheries, National Forest Service, and local managers. In the summer of 2013, Dr. Lundberg and his students will continue this project in collaboration with AW Research Laboratories on lakes in the Brainerd, Minnesota area, a popular resort area with approximately 500 lakes within a 30 mile radius.
Gallaudet University is a federally chartered private and premier university for the deaf and hard of hearing since 1864.
Copyright © 2021 Gallaudet University. All rights reserved.
800 Florida Avenue NE Washington, D.C. 20002
Spring 2021 – Dec 12Fall 2021 – May 15