Virginia CZM Program: 2017 Coastal Grant Project Description and Final Summary

Project Task:VA CZM logo

7

Grantee:

Virginia Institute of Marine Science

Project Title:

2017 Submerged Aquatic Vegetation Distribution and Abundance Survey

Project Description:

Submerged aquatic vegetation (SAV) is a critical living resource in Chesapeake Bay that has undergone rapid and dramatic baywide fluctuations in distribution and abundance over the last two decades, and is being subjected to declines in water quality and to ever increasing pressure from recreational, commercial, and industrial demands. Because SAV is dependent on good water quality to which it responds over short time scales, it can be an important indicator of water quality.

In 2017, VIMS will continue the annual SAV survey program, begun in 1984, by mapping SAV in the shoal areas of the entire Chesapeake Bay and its tributaries from digital aerail imagery acquired during late spring to late summer.

Digital aerial photography will be acquired at a photographic scale of approximate 1:24,000, following guidelines that address tidal stage, plant growth, sun angle, turbidity, wind, atmospheric transparency, sensor operation and land features to allow for acquisition of photographs under near optimal conditions.

Ground data on species distribution and abundance will be collected by participating agencies and citizen groups from as many of the Chesapeake Bay Program segments as possible and included in the final report.

The digital aerial imagery will be evaluated for SAV signatures using all available information.  Photographs containing SAV signatures will be orthographically corrected and mosaiced by USGS 7.5 minute topographic quadrangles using Orthobase and Imagine image processing software .

The perimeters of all SAV beds mapped from the 2017 aerial photography will be delineated on-screen using ArcInfo geographic information system (GIS) software and stored in an ArcInfo GIS database.  A final report will include maps of all SAV beds, and areas of these beds, as well as any ground truth information submitted to VIMS.  The report will be published on the VIMS web site, as in past years.  SAV polygons will also be available on the VIMS SAV interactive web site.

Federal Funding:

$60,000

Project Contact:

Robert Orth, 804.684.7392; jjorth@vims.edu

Project Status:

10/1/17 - 12/31/18; Project Open

Final Product:

Project Summary:

Disclaimer: This project summary provides the federal dollars initially awarded to the grantee. Due to underexpenditure or reprogramming of grant funds, this figure may change. For more information on the allocation of coastal grant funds, please contact Laura McKay, Virginia Coastal Program Manager, at 804.698.4323 or email:Laura.McKay@deq.virginia.gov

A more detailed Scope of Work for this project is available. Please direct your request for a copy to Virginia.Witmer@deq.virginia.gov

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Virginia Department of
Environmental Quality
P.O. Box 1105
Richmond, VA 23218
(804) 698-4000


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