SNAP

Sherman Creek at Shermans Dale, Pa.

Overview
  • Station Id: 01568000
  • County: Perry
  • Drainage Area: 188 sq.mi.
  • Station Coordinates: 40.344°, -77.194°
  • Period of record: 10/84 to 12/89 & 10/04 to present
Location Description

Pisgah State Road bridge at Dromgold.

Data

2016 Land Use

Urban Agricultural Agricultural Forested Other
Row Crops Pasture/Hay Total
5% 13% 12% 25% 69% 1%
Site Drainage Area

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Clear
2021 Flow Normalized Trends
Trend period (Water Year*) 2005-2021
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
Shermans Dale 2005-2021 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 -0.0539516 0.6568627 ALAN NS 0.0086496 0.5588235 ALAN NS
Nitrate-Nitrite -0.0570900 0.6568627 ALAN NS 0.0158651 0.7156863 L UP
Ammonia -0.0146717 0.9901961 HL DWN -0.0046323 0.8529412 L DWN
Dissolved Nitrogen -0.0786432 0.8137255 L DWN -0.0022338 0.6372549 ALAN NS
Nitrate-Nitrite -0.0737808 0.6960784 L DWN 0.0051987 0.5784314 ALAN NS
Ammonia -0.0149763 0.9901961 HL DWN -0.0057165 0.9313725 VL DWN
Total Phosphorus -0.0012452 0.6568627 ALAN NS -0.0025225 0.6764706 L DWN
Particulate Phosphorus -0.0009358 0.6960784 L DWN -0.0016870 0.6372549 ALAN NS
Dissolved Phosphorus -0.0004576 0.6176471 ALAN NS -0.0011606 0.7156863 L DWN
Orthophosphate 0.0017852 0.6960784 L UP 0.0003644 0.6176471 ALAN NS
Total Organic Carbon -0.2936281 0.8137255 L DWN -0.2070837 0.8333333 L DWN
Total Suspended Solids -3.9308995 0.9117647 VL DWN -5.6906747 0.8529412 L DWN
Suspended Sediment -1.4926487 0.6372549 ALAN NS -3.3708378 0.6960784 L DWN