Maps

Fish passage is a key component to the restoration of anadromous fish (shad and river herring) in the Chesapeake Bay watershed. These fish are blocked from much of their historic spawning areas, which included waters over 200 miles from the Bay. Maryland, Virginia, Pennsylvania and the District of Columbia have set goals to provide fish passage to make much of those historic spawning areas once again accessible to migratory fish. Other species that benefit from the unblocking of streams include eels, native species such as brook trout and other resident species.

This map shows Protected Lands in the Chesapeake Bay watershed as defined by the Chesapeake Bay Program. The data was acquired from various State Agencies and Non-Profit Conservation Organizations. The terms used to differentiate levels of protection are Public, Private, Agricultural Easement and Military. Public Lands: Includes lands identified as Local, State or Federally owned and managed. (e.g. - County Parks, State Forests, National Parks/Forests, Wildlife Refuge, etc.) Private Lands: Properties owned by private conservation groups or private lands encumbered with a conservation easement. Agricultural Easement: Properties protected under a State or local agricultural easement program. Military Lands: Lands owned and managed by different branches of the U.S. Military.

This map shows the locations of riparian forest buffer restoration projects throughout the Chesapeake Bay Watershed. Project locations were provided by Forestry Workgroup representatives from the Maryland Department of Natural Resources, Virginia Department of Forestry, and Pennsylvania Department of Conservation and Natural Resources.

In 2003, the CBP adopted the Strategy to Accelerate the Protection and Restoration of Submerged Aquatic Vegetation in the Chesapeake Bay including a commitment to plant 1,000 acres by 2008. In the first five years of this effort, the program partners have planted 139 acres or 14% of their initial goal. In 2007, 6 acres were planted with funding from the US Army Corps of Engineers and the National Oceanic and Atmospheric Administration. Both funding for SAV planting, and capacity for doing it, will need to be increased dramatically to meet the goal on time.

Population projections were produced by the Population Division of the U.S. Census Bureau. The projections were produced for the years 2001 to 2030, based on Census 2000 results, and the general assumption that recent state-specific trends in fertility, mortality, domestic migration, and international migration will continue.

This map shows the Delivered yield (load per area) of Total Phosphorus from point sources. Delivered yield is the amount of nutrient that is generated locally for each stream reach and weighted by the amount of in-stream loss that would occur with transport from the reach to Chesapeake Bay. The cumulative loss of nutrients from generation to delivery to the Bay is dependent on the travel time and instream-loss rate of each individual reach. This map shows estimates of Total Nitrogen based on mean conditions for the late 1990's time period using the SPARROW model from USGS. SPARROW, or SPAtially Referenced Regressions On Watershed (SPARROW) attributes, uses a nonlinear regression approach to spatially relate nutrient sources and watershed characteristics to nutrient loads of streams throughout the Chesapeake Bay watershed.

This map shows the Delivered yield (load per area) of Total Phosphorus from urban sources. Delivered yield is the amount of nutrient that is generated locally for each stream reach and weighted by the amount of in-stream loss that would occur with transport from the reach to Chesapeake Bay. The cumulative loss of nutrients from generation to delivery to the Bay is dependent on the travel time and instream-loss rate of each individual reach. This map shows estimates of Total Nitrogen based on mean conditions for the late 1990's time period using the SPARROW model from USGS. SPARROW, or SPAtially Referenced Regressions On Watershed (SPARROW) attributes, uses a nonlinear regression approach to spatially relate nutrient sources and watershed characteristics to nutrient loads of streams throughout the Chesapeake Bay watershed.

This map shows the Delivered yield (load per area) of Total Phosphorus from agricultural sources. Delivered yield is the amount of nutrient that is generated locally for each stream reach and weighted by the amount of in-stream loss that would occur with transport from the reach to Chesapeake Bay. The cumulative loss of nutrients from generation to delivery to the Bay is dependent on the travel time and instream-loss rate of each individual reach. This map shows estimates of Total Nitrogen based on mean conditions for the late 1990's time period using the SPARROW model from USGS. SPARROW, or SPAtially Referenced Regressions On Watershed (SPARROW) attributes, uses a nonlinear regression approach to spatially relate nutrient sources and watershed characteristics to nutrient loads of streams throughout the Chesapeake Bay watershed.

This map shows population estimates within the Chesapeake Bay watershed on a county-by-county basis for the year 2005. The Census Bureau publishes July 1 estimates for years after the last decennial census (2000), as well as for past decades. Data series for births, deaths, and domestic and international migration are used to update the decennial census base counts.

This map shows the Delivered yield (load per area) of Total Phosphorus from all sources. Delivered yield is the amount of nutrient that is generated locally for each stream reach and weighted by the amount of in-stream loss that would occur with transport from the reach to Chesapeake Bay. The cumulative loss of nutrients from generation to delivery to the Bay is dependent on the travel time and instream-loss rate of each individual reach. This map shows estimates of Total Nitrogen based on mean conditions for the late 1990's time period using the SPARROW model from USGS. SPARROW, or SPAtially Referenced Regressions On Watershed (SPARROW) attributes, uses a nonlinear regression approach to spatially relate nutrient sources and watershed characteristics to nutrient loads of streams throughout the Chesapeake Bay watershed.