SNAP

East Mahantango near Dalmatia, Pa.

Overview
  • Station Id: 01555500
  • County: Northumberland
  • Drainage Area: 162 sq.mi.
  • Station Coordinates: 40.611°, -76.911°
  • Period of record: 1/12 to present
Location Description

Site located on Kiwanis Farm Road bridge 3 miles south of Dalmatia.

Data

2016 Land Use

Urban Agricultural Agricultural Forested Other
Row Crops Pasture/Hay Total
7% 31% 9% 39% 51% 3%
Site Drainage Area

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Clear
2019 Flow Normalized Trends
Trend period (Water Year*) 2013-2019
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
East Mahantango 2013-2019 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 0.252 0.70 L UP -0.028 0.60 ALAN NS
Nitrate-Nitrite -0.180 0.58 ALAN NS -0.083 0.72 L DOWN
Ammonia -0.005 0.72 L DOWN -0.004 0.81 L DOWN
Dissolved Nitrogen 0.364 0.72 L UP 0.024 0.56 ALAN NS
Nitrate-Nitrite 0.332 0.70 L UP 0.021 0.54 ALAN NS
Ammonia -0.006 0.79 L DOWN -0.005 0.91 VL DOWN
Total Phosphorus -0.023 0.87 L DOWN -0.016 0.87 L DOWN
Particulate Phosphorus -0.010 0.89 L DOWN -0.013 0.83 L DOWN
Dissolved Phosphorus -0.015 0.85 L DOWN -0.005 0.95 HL DOWN
Orthophosphate -0.012 0.85 L DOWN -0.005 0.93 VL DOWN
Total Organic Carbon -0.750 0.93 VL DOWN -0.401 0.95 HL DOWN
Total Suspended Solids -14.215 0.77 L DOWN -35.891 0.66 ALAN NS
Suspended Sediment -13.018 0.74 L DOWN -18.634 0.70 L DOWN