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<p><span style='font-size:medium;'>In 2019 an aquatic habitat survey assessment was performed by the <span>United States Environmental Protection Agency Region 3 (Mid-Atlantic). This survey </span>utilized a single beam echo sounder (Bio Sonics MX Habitat Echo sounder), along with the accompanying post-processing software (Visual Habitat), to assess submerged aquatic vegetation (SAV) distribution and extent along the tidal Delaware River. Sampling in this portion of the Delaware River occurred in July, August, and September. The distributions for SAV heights at different depths suggests that the portion of the water column </span><span style='font-size:medium;'>between 1 and 4 meters in depth appears to be the optimal growth area for SAV in tidal Delaware </span><span style='font-size:medium;'>River, with the most plant growth between 2 – 3 meters in depth (elevation). Due to the limited area of SAV growth surveys took place in the 2-3 hours before and after high tide in order to operate the research vessel safely close to the shore.</span></p>
<div><span style='font-size:medium;'> </span></div>
<div><span style='font-size:medium;'>This layer represents each "ping" or point recorded by the echo sounder, which shows the lines of navigation the research vessel took during the survey. </span></div><div><span style='font-size:medium;'><br /></span></div><div><div><a href='https://epa.maps.arcgis.com/home/item.html?id=1cd395e6fef847d3a3ae3e34ed3eed28' target='_blank' rel='nofollow ugc noopener noreferrer'><b><font color='#0000ff'>Download Points (CSV)</font></b></a></div></div>
SAVDelaware RiverSample Points
2019 SAV survey echo sounder sample points Delaware River (entire river)
US EPA Region 3
<p>None.</p>
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