Table 1. Characteristics of four eutrophic lakes sampled: Lakes Mendota, Monona, and Kegonsa are directly connected via the Yahara River, while Lake Wingra is primarily fed by ground water and urban run-off and runs into Lake Monona.
| Lake characteristics | Mendota | Monona | Kegonsa | Wingra* |
|---|---|---|---|---|
| Coordinates | 43°36'24" N, 89°25'24" W | 43°4'9" N, 89°21'34" W | 42°57'50" N, 89°14'60" W | 43°3'13" N, 89°25'11" W |
| Area (km2) | 39.4 | 13.3 | 13.0 | 1.3 |
| Max depth (m) | 25.3 | 22.6 | 9.8 | 4.3 |
| Mean depth (m) | 12.7 | 8.3 | 5.1 | 2.7 |
| Water residence time (yr) | 4.5 | 0.9 | 0.5 | ND |
| Landscape | U, F, W | U, F | U, F, W | U, F, W |
| Primary non-point pollution | Ag | Ag | Ag | U |
ND = not determined. U = urban, F = forested, W = wetland, Ag agriculture
*Lake Wingra is primarily fed by ground water and urban run-off