Octoraro Creek at Richardsmere, Md.
Overview
- Station Id: 01578475
- County: Cecil
- Drainage Area: 189 sq.mi.
- Station Coordinates: 39.693°, -76.125°
- Period of record: 2006 to present
Location Description
Station is on the bridge 0.2 miles west of Richardsmere on Colora Road.
Data
- Data File Description
- OCT.xlsx October 2005 to present
2021 Land Use
| Urban | Agricultural | Agricultural | Forested | Other | ||
|---|---|---|---|---|---|---|
| Row Crops | Pasture/Hay | Total | ||||
| 13% | 41% | 21% | 62% | 22% | 3% | |
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
2024 Flow Normalized Trends
| Trend period (Water Year*) | 2007-2024 |
|---|---|
| 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 | |
| Richardsmere 2007-2024 | 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 | -0.7999488 | 0.9313725 | VL | DWN | -0.1475631 | 0.9509804 | HL | DWN |
| Nitrate-Nitrite | -0.6322122 | 0.9117647 | VL | DWN | -0.1105056 | 0.8529412 | L | DWN |
| Ammonia | -0.0329676 | 0.9509804 | HL | DWN | -0.0142627 | 0.8725490 | L | DWN |
| Dissolved Nitrogen | -0.8361368 | 0.9509804 | HL | DWN | -0.1697231 | 0.9509804 | HL | DWN |
| Nitrate-Nitrite | -0.5978526 | 0.9117647 | VL | DWN | -0.0998271 | 0.8137255 | L | DWN |
| Ammonia | -0.0321390 | 0.9509804 | HL | DWN | -0.0143608 | 0.8921569 | L | DWN |
| Total Phosphorus | -0.0227641 | 0.7745098 | L | DWN | 0.0010796 | 0.5392157 | ALAN | NS |
| Particulate Phosphorus | 0.0005167 | 0.5392157 | ALAN | NS | 0.0048135 | 0.7549020 | L | UP |
| Dissolved Phosphorus | -0.0263892 | 0.9313725 | VL | DWN | -0.0054193 | 0.7549020 | L | DWN |
| Orthophosphate | -0.0250359 | 0.9705882 | HL | DWN | -0.0044935 | 0.7549020 | L | DWN |
| Total Organic Carbon | -0.5588340 | 0.9313725 | VL | DWN | -0.2046958 | 0.9313725 | VL | DWN |
| Total Suspended Solids | -1.4405852 | 0.5588235 | ALAN | NS | 2.2631637 | 0.7156863 | L | UP |
| Suspended Sediment | 20.4711846 | 0.9901961 | HL | UP | 7.2891008 | 0.7745098 | L | UP |