MN PUBLICATIONS
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- USGS Publications Warehouse
ABOUT THE MINNESOTA WSC
USGS IN YOUR STATE
USGS Water Science Centers are located in each state.
|
Total nitrite plus nitrate nitrogen
and total phosphorus yields at selected sites in the Upper Mississippi
River Basin study area, water years 1984-93 (shown in downstream order).
Site
number
(fig. 1)
|
Water-quality site
|
|
Yield, units are in tons/square mile/year
|
Location
|
|
Total nitrite plus nitrate nitrogen
|
Total phosphorus
|
6
|
Rum River
|
|
0.24
|
0.06
|
9
|
Minnesota River
|
|
3.95
|
0.10
|
17
|
St. Croix River
|
|
0.08
|
0.03
|
18
|
Kettle River
|
|
0.08
|
0.05
|
23
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Vermillion River
|
|
1.24
|
0.05
|
25
|
Straight River
|
|
8.22
|
0.30
|
|