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
2019 Flow Normalized Trends
Trend period (Water Year*) 2005-2019
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 2005-2019 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 0.007 0.60 ALAN NS 0.035 0.79 L UP
Nitrate-Nitrite -0.004 0.58 ALAN NS 0.038 0.89 L UP
Ammonia -0.007 0.83 L DOWN -0.002 0.56 ALAN NS
Dissolved Nitrogen -0.004 0.56 ALAN NS 0.022 0.72 L UP
Nitrate-Nitrite -0.026 0.52 ALAN NS 0.030 0.85 L UP
Ammonia -0.005 0.79 L DOWN -0.002 0.66 ALAN NS
Total Phosphorus -0.001 0.58 ALAN NS -0.002 0.64 ALAN NS
Particulate Phosphorus -0.001 0.64 ALAN NS -0.002 0.60 ALAN NS
Dissolved Phosphorus 0.000 0.54 ALAN NS -0.001 0.60 ALAN NS
Orthophosphate 0.005 0.72 L UP 0.001 0.56 ALAN NS
Total Organic Carbon -0.536 0.95 HL DOWN -0.300 0.87 L DOWN
Total Suspended Solids -3.508 0.97 HL DOWN -3.077 0.77 L DOWN
Suspended Sediment -3.079 0.81 L DOWN -0.040 0.52 ALAN NS