Crabby Tributary 2
Basin: Southwest Schuylkill Basin
| Location | |
|---|---|
| Station number | 117 |
| description | Walnut Lane, southern tributary |
| Latitude (decimal) | 40.0494 |
| Longitude (decimal) | -75.4673 |
| Land Use | |
| Watershed area (km2) | 1 |
| Percent developed | 63.6 |
| Percent in agriculture | 0.1 |
| Percent forested | 35 |
| Percent wetland or water | 0.0 |
| Percent in quarries or mining | 0.0 |
| Chemistry | |
| Nitrate (mg/L) | 3.2 |
| Total Dissolved Phosphorus (mg/L) | 0.012 |
| pH | 7.7 |
| Conductivity (μmhos) | 433 |
| Alkalinity (as mg/L CaCO3) | 36 |
| Macroinvertebrate Data | |
| years sampled | 2007 |
| MAIS score | 10.5 |
| water quality based on MAIS score | fair |
| 1st most abundant macroinvertebrate | Baetidae (small minnow mayflies) |
| 2nd most abundant macroinvertebrate | Chironomidae (midges) |
| 3rd most abundant macroinvertebrate | Simuliidae (black flies) |
| 4th most abundant macroinvertebrate | Oligochaeta (aquatic earthworms) |
| 5th most abundant macroinvertebrate | Amphipoda (scuds) |
| 6th most abundant macroinvertebrate | Nemouridae (nemourid stoneflies) |
| 7th most abundant macroinvertebrate | Capniidae/Leuctridae (winter and spring stoneflies) |
| 8th most abundant macroinvertebrate | Philopotamidae (fingernet caddisflies) |
| 9th most abundant macroinvertebrate | Chloroperlidae (green stoneflies) |
| 10th most abundant macroinvertebrate | Empididae (aquatic dance flies) |