American Wildcelery (Vallisneria americana):
Ecological Considerations for Restoration
Tables and Figures
Table 3. Mean and monthly variation of water chemistry parameters of Pool 7 (navigation channel) of the Upper Mississippi River, May to September, 1972-81 (Dawson et al. 1984).
| Parameter | Mean | Min-max. | Parameter | Mean | Min-max. |
| Nitrite nitrogen (mg/L) | 0.03 | <0.008- 0.040 | BOD* (mg/L) | 2.8 | 2.3- 4.0 |
| Nitrate nitrogen (mg/L) | 0.49 | <0.37- 0.68 | Total hardness (mg/L as CaCO3) | 157 | 152-164 |
| Ammonia nitrogen (mg/L) | 0.13 | <0.07- 0.15 | Dissolved oxygen (mg/L) | 8.5 | 6.0- 11.5 |
| Total phosphate (mg/L as PO4) | 0.63 | <0.42- 1.00 | Suspended matter (mg/L) | 27.3 | 16.0- 57.3 |
*Biological oxygen demand.
