Assumptions about ground
water recharge
(V
r
and N
r)
z
Recharge varies around the state. Estimates
of 1 inch, 3 inches, 10 inches, and 14 inches.
z
Nitrate concentration of precipitation in
Indiana averages 1 mg/l.
z
Some nitrate from other sources such as lawn
fertilization
z
N
r
probably around 2 mg/l.
