Upper Swamp @ Gilbertsville
Basin: Perkiomen Creek Basin
| Location | |
|---|---|
| Station number | 102 |
| description | Below Middle Creek Road bridge |
| Latitude (decimal) | 40.3172 |
| Longitude (decimal) | -75.5875 |
| Land Use | |
| Watershed area (km2) | 37 |
| Percent developed | 9.5 |
| Percent in agriculture | 45.7 |
| Percent forested | 41 |
| Percent wetland or water | 0.7 |
| Percent in quarries or mining | 0.3 |
| Chemistry | |
| Nitrate (mg/L) | 4.3 |
| Total Dissolved Phosphorus (mg/L) | 0.248 |
| pH | 9.3 |
| Conductivity (μmhos) | 546 |
| Alkalinity (as mg/L CaCO3) | 55 |
| Macroinvertebrate Data | |
| years sampled | 2006 |
| MAIS score | 1.9 |
| water quality based on MAIS score | poor |
| 1st most abundant macroinvertebrate | Oligochaeta (aquatic earthworms) |
| 2nd most abundant macroinvertebrate | Chironomidae (midges) |
| 3rd most abundant macroinvertebrate | Elmidae (riffle beetles) |
| 4th most abundant macroinvertebrate | Nematoda (nematodes) |
| 5th most abundant macroinvertebrate | Ephemerellidae (spiny crawler mayflies) |
| 6th most abundant macroinvertebrate | Philopotamidae (fingernet caddisflies) |
| 7th most abundant macroinvertebrate | Psephenidae (water penny beetles) |
| 8th most abundant macroinvertebrate | Acari (water mites) |
| 9th most abundant macroinvertebrate | Ancylidae (limpets) |
| 10th most abundant macroinvertebrate | Trichoptera (unidentified caddisflies) |
