Swatara Creek near Hershey, Pa.
Overview
- Station Id: 01573560
- County: Dauphin
- Drainage Area: 484 sq.mi.
- Station Coordinates: 40.287°, -76.678°
- Period of record: 10/84 to 12/89 & 10/04 to present
Location Description
10/84-12/89 - Station is located at a bridge 0.7 miles downstream of Route 39 bridge and approximately 100 feet upstream of the confluence of Spring Creek and Swatara Creek bridge near Union Deposit. Gage is located on east bank, 0.5 miles upstream of Route 39 bridge.
Data
- Data File Description
- SWA8489.xlsx October 1984 to December 1989
- SWA.xlsx October 2004 to present
2021 Land Use
| Urban | Agricultural | Agricultural | Forested | Other | ||
|---|---|---|---|---|---|---|
| Row Crops | Pasture/Hay | Total | ||||
| 16% | 23% | 15% | 38% | 42% | 4% | |
Site Drainage Area
Please select a parameter from the list to view graphs of loads and concentrations. You may need to scroll down to view graphs.
Loads
Concentrations
Data
2023 Flow Normalized Trends
| Trend period (Water Year*) | 2005-2023 |
|---|---|
| Trend & Direction | NS – Not significant, UP – Increasing trend, DOWN – Decreasing trend |
| Hypothesis Test significance level (i.e. α) | 0.1 |
| * Water Year runs from October 1st to September 30th of the following year | |
| Likelihood Descriptor | Range of values** |
|---|---|
| HL (Highly Likely) | ≥0.95 and ≤1.00 |
| VL (Very Likely) | ≥0.90 and <0.95 |
| L (Likely) | ≥0.66 and <0.90 |
| ALAN (About as Likely as Not) | >0.33 and <0.66 |
| ** Values represent the posterior mean estimate of the probability of a trend | |
| Swatara 2005-2023 | Flow Normalized Concentration (mg/L) | Flow Normalized Load (Millions Kg/yr) | ||||||
|---|---|---|---|---|---|---|---|---|
| Likelihood Test | Likelihood Test | |||||||
| Parameter | Change | Value | Descriptor | Trend | Change | Value | Descriptor | Trend |
| Total Nitrogen | -1.2216602 | 0.9901961 | HL | DWN | -0.5615543 | 0.9901961 | HL | DWN |
| Nitrate-Nitrite | -1.3386836 | 0.9901961 | HL | DWN | -0.7379673 | 0.9901961 | HL | DWN |
| Ammonia | -0.0175899 | 0.8921569 | L | DWN | -0.0089246 | 0.7156863 | L | DWN |
| Dissolved Nitrogen | -1.2603396 | 0.9901961 | HL | DWN | -0.6157917 | 0.9901961 | HL | DWN |
| Nitrate-Nitrite | -1.2998113 | 0.9901961 | HL | DWN | -0.6861142 | 0.9901961 | HL | DWN |
| Ammonia | -0.0152774 | 0.8529412 | L | DWN | -0.0079991 | 0.6568627 | ALAN | NS |
| Total Phosphorus | 0.0037670 | 0.7352941 | L | UP | 0.0213487 | 0.7941176 | L | UP |
| Particulate Phosphorus | 0.0063338 | 0.8333333 | L | UP | 0.0145447 | 0.7156863 | L | UP |
| Dissolved Phosphorus | -0.0016182 | 0.5000000 | ALAN | NS | 0.0093175 | 0.8921569 | L | UP |
| Orthophosphate | -0.0045773 | 0.7352941 | L | DWN | 0.0071389 | 0.8529412 | L | UP |
| Total Organic Carbon | 0.1858638 | 0.8333333 | L | UP | -0.0665779 | 0.5000000 | ALAN | NS |
| Total Suspended Solids | 2.8627989 | 0.7549020 | L | UP | 0.5199816 | 0.5588235 | ALAN | NS |
| Suspended Sediment | 13.7505134 | 0.9901961 | HL | UP | 12.5746398 | 0.8725490 | L | UP |