Regional Sediment Management seeks a greater understanding and knowledge about the interrelationships between coastal and offshore sediment deposits, sediment pathways, and how sand moves about the shoreline. From this information, improved sediment management decisions, policies, and practices can be formulated and implemented on a regional scale to preserve or enhance exisiting beaches, address inter-related resource needs and opportunities, and optimally manage coastal projects for the regional benefit.
Mathews County, located at the eastern tip of the "Middle Peninsula" between the York and the Piankatank Rivers, is bordered mostly by water with Chesapeake Bay on at the east, Mobjack Bay on the south, the North river on the west, and the Piankatank River on the north. Except for approximately five miles that border Gloucester County, the County's perimeter is formed entirely by its 350-mile shoreline.
- End Point Rate (EPR) of Change (ft/yr) between 1937 and 2009 are depicted in a series of EPR maps. While the rates are hightly variable, much of the Bay coast of Mathews is undergoing significant erosion. Lower fetch environments in the creeks have low and very low erosion rates.
- Tide range varies around Mathews County. This graphic depicts the variation around the County.
- Past data from NOAA tide gauges indicate that the level of the Bay near Mathews County is rising at a rate of 1.25 ft/century. Chesapeake Bay Program’s Scientific and Technical Advisory Committee (STAC) states that by the year 2100, relative sea levelis predicted to rise by two to five feet. In order to determine the impacts of sea-level rise in the next 50 years on Mathews County’s, Lidar elevation data was modeled to show the regions impacted by a 0.5, 1, and 2 ft rise in water level .One of the simplest consequences of sea-level rise is that the shoreline will move landward as low areas are inundated. Others are that storm tides will reach farther inland; erosion will accelerate; some septic systems in low areas will fail; some wells will start to yield brackish water; tidal marshes will change, and beaches may be lost.
- Submerged Aquatic Vegetation (SAV) is an important habitat in Chesapeake Bay and an important consideration for dredge-material placement along the shoreline. A summary of the location and densities of SAV between 2005 and 2011 was prepared from data collected by the VIMS SAV program. Mathews County summary maps.
- Habitat changes have occured as erosion impacts the County's Chesapeake Bay shorelines. This map depicts the marsh and beach present in 1937 and 2009 and the change in beach during this period. These data are the result of a visual analysis and digitization of habitat type along the Bay coast and is not intended to be a complete description of habitat change in the County. Habitat changes are listed in this table.