SNAP

West Branch Susquehanna River at Lewisburg, Pa.

Overview
  • Station Id: 01553500
  • County: Union
  • Drainage Area: 6,825 sq.mi.
  • Station Coordinates: 40.967°, -76.879°
  • Period of record: 10/84 to present
Location Description

The sampling location is on the Market Street bridge with the gage located on the east bank next to the Market Street bridge abutment on the downstream side.

Data

2016 Land Use

Urban Agricultural Agricultural Forested Other
Row Crops Pasture/Hay Total
6% 4% 8% 12% 78% 5%
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.

Clear
2019 Flow Normalized Trends
Trend period (Water Year*) 1985-2019
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
Lewisburg 1985-2019 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 -0.581 0.99 HL DOWN -5.359 0.99 HL DOWN
Nitrate-Nitrite -0.182 0.99 HL DOWN -1.155 0.97 HL DOWN
Ammonia -0.041 0.99 HL DOWN -0.376 0.99 HL DOWN
Dissolved Nitrogen -0.434 0.99 HL DOWN -3.875 0.99 HL DOWN
Nitrate-Nitrite -0.213 0.97 HL DOWN -3.875 0.99 HL DOWN
Ammonia -0.033 0.99 HL DOWN -0.330 0.99 HL DOWN
Total Phosphorus -0.040 0.99 HL DOWN -0.245 0.97 HL DOWN
Particulate Phosphorus -0.013 0.97 HL DOWN 0.024 0.54 ALAN NS
Dissolved Phosphorus -0.030 0.99 HL DOWN -0.278 0.99 HL DOWN
Orthophosphate -0.008 0.99 HL DOWN -0.021 0.91 VL DOWN
Total Organic Carbon -0.685 0.99 HL DOWN -4.631 0.99 HL DOWN
Total Suspended Solids -7.682 0.97 HL DOWN -138.876 0.75 L DOWN
Suspended Sediment -7.437 0.99 HL DOWN -96.935 0.85 L DOWN