Aerial Survey Techniques to Map and Monitor Aquatic Plant Populations-Four Case Studies.
Abstract
During the period from 1977 through 1981, the U.S. Army Engineer Waterways Experiment Station conducted a number of aerial survey studies in conjunction with the U.S. Army Corps of Engineers Aquatic Plant Control Research Program. These studies generally involved the use of aerial surveys to map and monitor the aerial extent of aquatic macrophyte populations. Unique photointerpretation and mapping procedures and computer software for processing mapped data were developed in conjunction with these efforts. This report contains four of the more comprehensive case studies, as follows: (a) Lewis Creek Reservoir, Texas. Comparison of automated and manual techniques to compute areal coverage of hydrilla (Hydrilla verticillata) (L.f.) Royle) on two scales of aerial photography. (b) Lake Seminole, Alabama-Florida-Georgia. Comparison of boat and aerial surveys of giant cutgrass (Zizaniopsis miliacea (Michx.) Doell and Asch.). (c) Gatun Lake, Panama. Study of hydrilla growth in a tropical environment. (d) Lake Osoyoos, Washington. Monitoring of changes in a community dominated by Eurasian watermilfoil (Myriophyllum spicatum L.) during a 1-year period.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1983
- Accession Number
- ADA128990
Entities
People
- Elba A. Dardeau Jr.