Evaluation of a digital echo sounder system for detection of submersed aquatic vegetation
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A technique is presented for rapid detection of submersed aquatic vegetation (SAV) using a high-frequency, high-resolution digital echo sounder linked with global positioning system equipment. The acoustic reflectivity of SAV allows for detection and explicit meaqsurement of canopy geometry using a digital signal processing algorithm described here. Comparing output data from this system with physical measurements shows good detection and measurement performance over a wide range of conditions for freshwater tape grass (Vallisneria americana) and seagrasses (Thalassia testudinum, Halodule wrightii, andSyringodium filiforme) in a sandy-bottom, south Florida estuary. The range of environmental conditions for which the system can be used is defined. Based on these measured performance data and a review of existing literature, this system appears to fill a gap in the inventory of established methods for measuring the distribution and abundance of submersed macrophytes.
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- Evaluation of a digital echo sounder system for detection of submersed aquatic vegetation
Volume 25, Issue 1 , pp 133-141
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- 1. U.S. Army Engineer Research and Development Center, 3909 Halls Ferry Road, 39180, Vicksburg, Mississippi
- 2. South Florida Water Management District, 3301 Gun Club Road, 33406, West Palm Beach, Florida