SNAP

Home  Portals  Water Quality Projects Sediment & Nutrient Assessment  Susquehanna River at Danville

Susquehanna River at Danville, Pa.

Overview
  • Station Id: 01540500
  • County: Montour
  • Drainage Area: 11,222 sq.mi.
  • Station Coordinates: 40.958°, -76.621°
  • Period of record: 10/84 to present
Location Description

The sampling location is on the Mill Street bridge with the gage located on the west bank, 200 feet upstream of Mill Street bridge.

Data

2021 Land Use

Urban Agricultural Agricultural Forested Other
Row Crops Pasture/Hay Total
9% 4% 21% 25% 60% 6%
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
2023 Flow Normalized Trends
Trend period (Water Year*) 1985-2023
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
Danville 1985-2023 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 -0.8537683 0.9901961 HL DWN -13.7669965 0.9901961 HL DWN
Nitrate-Nitrite -0.3217824 0.9901961 HL DWN -4.9515042 0.9901961 HL DWN
Ammonia -0.0728666 0.9901961 HL DWN -1.2627840 0.9901961 HL DWN
Dissolved Nitrogen -0.5708465 0.9901961 HL DWN -9.2108692 0.9901961 HL DWN
Nitrate-Nitrite -0.3319619 0.9901961 HL DWN -4.9948764 0.9901961 HL DWN
Ammonia -0.0754265 0.9901961 HL DWN -1.3009908 0.9901961 HL DWN
Orthophosphate -0.0064503 0.9509804 HL DWN -0.0886119 0.7549020 L DWN
Total Phosphorus -0.0588149 0.9901961 HL DWN -0.4855835 0.9705882 HL DWN
Particulate Phosphorus -0.0366015 0.9901961 HL DWN -0.1447328 0.6960784 L DWN
Dissolved Phosphorus -0.0241934 0.9901961 HL DWN -0.3899324 0.9901961 HL DWN
Total Organic Carbon -1.8345156 0.9901961 HL DWN -28.7361954 0.9901961 HL DWN
Total Suspended Solids 5.7226962 0.7156863 L UP 661.0212626 0.8529412 L UP
Suspended Sediment -21.6019124 0.9705882 HL DWN -510.1623040 0.7352941 L DWN