Urban Sources of Total Phosphorus

Delivered Yield to the Chesapeake Bay

4^

Chesapeake Bay Program
A Watershed Partnership

Data Sources: U.S. Geological Survey SPARROW Model.
Digital Data Used to Relate Nutrient Inputs to Water Quality
in the Chesapeake Bay Votershed, Version 3.0 (2004)

(http: //md. wate r. u sg s. g ov/p u b I i cati o n s/of r-2004-1433/)

For more information, visit www.chesapeakebay.net
Disciaimer: www.chesapeakebay.netAermsofuse.htm

0	25 50	100 Kilometers

1	i i i i i i i i
I—r

Delivered Phosphorus (kg/hec/yr)

0.000- 0.01

0.011 -0.02

0.021 - 0.03

0.031 - 0.04

0.041 - 0.05

0.051 - 0.06

0.061 - 0.07

0.071 - 0.08

>0.08

Delivered yield (load per area) 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
traveltime and instream-loss rate of each
individual reach. This map shows estimates
based on mean conditions for the late 1990's
time period.

Created by JW, 2/1 3/08	UTM Zone 18N, NAD 83

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