Date of Award


Document Type


Degree Name

Master of Arts (MA)


Geography and Geology

First Advisor

Dr. Jeffrey Peake


This study used to Spectron Industries SE-590 portable spectroradiometer to investigate a common Midwestern wetland species, Ceratophllum. Primary research objectives were: determine the effect of Ceratophllum on the composite spectral signal upwelling from a column of water, determine the death constraint for remote identification of Ceratophllum, and ascertain the presence of Ceratophllum in chlorophyll-laden water. Characteristic absorption features at 443 nm and 670 nm decreased with increasing depth and also as the algal chlorophyll concentrations increased. A wavelength shift in the NIR, associated with increasing depth was found to exist for water columns relatively free of algal chlorophyll as well as those containing denser concentrations of algal chlorophyll. The depth constraint was not determined and requires further study.


A Thesis Presented to the Department of Geography and Geology and the Faculty of the Graduate College University of Nebraska In Partial Fulfillment of the Requirements for the Degree Master of Arts University of Nebraska at Omaha. Copyright 1996 Diana M. Reehoorn.