TABLE 5.
Changes in Dissolved Nitrate Plus Nitrite Flux for the Nine RIM Sites for Two Periods: 1978-2008 and 2000-2008.
| 1978-2008 |
2000-2008 |
|||
|---|---|---|---|---|
| River | Slope (% per year) | Flux Change (kg/day) | Slope (% per year) | Flux Change (kg/day) |
| Susquehanna | +0.2 | +6,400 | −0.9 | −8,600 |
| Potomac | −0.1 | −1,200 | −1.5 | −4,800 |
| James | −0.5 | −880 | +1.2 | +400 |
| Rappahannock | +0.1 | +69 | +0.4 | +71 |
| Appomattox | +0.2 | +21 | −1.3 | −55 |
| Patuxent | −1.2 | −560 | −1.9 | −160 |
| Pamunkey | −1.0 | −240 | −1.4 | −73 |
| Mattaponi | +0.3 | +17 | +0.7 | +10 |
| Choptank | +1.8 | +147 | +1.6 | +48 |
Flux change is the flow-normalized annual flux estimate at the end of the period minus the flow-normalized annual flux estimate at the beginning of the period. The slope is this flux change per year expressed in percentage terms over the period.