SNAP

Pequea Creek at Martic Forge, Pa.

Overview
  • Station Id: 01576787
  • County: Lancaster
  • Drainage Area: 149 sq.mi.
  • Station Coordinates: 39.906°, -76.328°
  • Period of record: 10/04 - Present
Location Description

Station is on the bridge 0.06 miles Northwest of Martic Forge on Route 324.

Data

2016 Land Use

Urban Agricultural Agricultural Forested Other
Row Crops Pasture/Hay Total
14% 45% 16% 61% 23% 2%
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
Martic Forge 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 -1.585 0.97 HL DOWN -0.224 0.95 HL DOWN
Nitrate-Nitrite -1.373 0.95 HL DOWN -0.191 0.87 L DOWN
Ammonia 0.025 0.74 L UP 0.008 0.81 L UP
Dissolved Nitrogen -1.722 0.97 HL DOWN -0.247 0.93 VL DOWN
Nitrate-Nitrite -1.191 0.91 VL DOWN -0.163 0.81 L DOWN
Ammonia 0.027 0.83 L UP 0.009 0.83 L UP
Total Phosphorus 0.071 0.74 L UP 0.019 0.62 ALAN NS
Particulate Phosphorus 0.026 0.72 L UP 0.012 0.66 ALAN NS
Dissolved Phosphorus 0.038 0.75 L UP 0.007 0.68 L UP
Orthophosphate 0.041 0.79 L UP 0.009 0.66 ALAN NS
Total Organic Carbon -0.302 0.70 L DOWN -0.131 0.79 L DOWN
Total Suspended Solids 3.682 0.52 ALAN NS -1.727 0.56 ALAN NS
Suspended Sediment 33.832 0.75 L UP 17.187 0.72 L UP