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
2022 Flow Normalized Trends
Trend period (Water Year*) 1985-2022
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 1985-2022 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 -0.5493476 0.9901961 HL DWN -5.2198695 0.9901961 HL DWN
Nitrate-Nitrite -0.1337865 0.9901961 HL DWN -0.6750425 0.9313725 VL DWN
Ammonia -0.0465584 0.9901961 HL DWN -0.4188682 0.9901961 HL DWN
Dissolved Nitrogen -0.3976527 0.9901961 HL DWN -3.5396399 0.9901961 HL DWN
Nitrate-Nitrite -0.1659081 0.9901961 HL DWN -0.9109324 0.9705882 HL DWN
Ammonia -0.0404284 0.9901961 HL DWN -0.3899359 0.9901961 HL DWN
Total Phosphorus -0.0389017 0.9901961 HL DWN -0.2547398 0.9901961 HL DWN
Particulate Phosphorus -0.0129896 0.9901961 HL DWN -0.0048954 0.6372549 ALAN NS
Dissolved Phosphorus -0.0293901 0.9901961 HL DWN -0.2725017 0.9901961 HL DWN
Orthophosphate -0.0091614 0.9705882 HL DWN -0.0347267 0.9509804 HL DWN
Total Organic Carbon -0.5544419 0.9705882 HL DWN -4.3529294 0.9313725 VL DWN
Total Suspended Solids -8.3807431 0.9117647 VL DWN -134.5692874 0.7745098 L DWN
Suspended Sediment -10.0765969 0.9705882 HL DWN -148.1773585 0.8333333 L DWN