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
2000 Land Use
Urban Agricultural Forested Other
Urban Agricultural Forested Other
Row Crops Pasture/Hay Total
3% 11% 18% 29% 60% 8%
Site Drainage Area

Please select a parameter from the list to view graphs of loads and concentrations. After a selection is made, you may need to scroll down to view the graphs.

2015 Flow Normalized Trends

Trend period (Water Year) 1984-2015
FNC (Flow Normalized Concentration) (mg/L) FNC Slope – mg/L/yr
FNF (Flow Normalized Flux) 10^6 kg/yr FNF Slope – 10^6 kg/yr/yr
Trend & Direction NS – Not significant,  UP – Increasing trend,  DOWN – Decreasing trend
SMK – Seasonal Mann-Kendall for flow trends, alpha level 0.05
FNC/FNF alpha level 0.1
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
Parameter/code Trend Test Change Slope % Change Over the Period of Record Hypothesis Test Likelihood Test
P-value Trend Value Descriptor Direction
FLOW / 60 SMK - - - 0.329 NS - - -
TN / 600 FNC -0.772 -0.026 -47 <0.05 Down 0.99 HL Down
FNF -11.97 -0.4 -44 <0.05 Down 0.99 HL Down
TNOx / 630 FNC -0.305 -0.01 -38 <0.05 Down 0.99 HL Down
FNF -4.21 -0.14 -33 <0.05 Down 0.99 HL Down
TON / 605 FNC -0.465 -0.016 -58 <0.05 Down 1.00 HL Down
FNF -8.19 -0.27 -56 0.074 Down 0.97 HL Down
TNH3 / 610 FNC -0.060 -0.002 -64 <0.05 Down 0.99 HL Down
FNF -0.97 -0.032 -62 <0.05 Down 0.99 HL Down
DN / 602 FNC -0.576 -0.019 -44 <0.05 Down 0.99 HL Down
FNF -9.16 -0.31 -43 <0.05 Down 0.99 HL Down
DNOx / 631 FNC -0.322 -0.011 -39 <0.05 Down 0.99 HL Down
FNF -4.57 -0.15 -35 <0.05 Down 0.99 HL Down
DON / 607 FNC -0.252 -0.0084 -54 <0.05 Down 0.99 HL Down
FNF -4.50 -0.15 -57 <0.05 Down 0.99 HL Down
DNH3 / 608 FNC -0.062 -0.0021 -68 <0.05 Down 0.99 HL Down
FNF -0.98 -0.033 -64 <0.05 Down 0.99 HL Down
TP / 665 FNC -0.054 -0.0018 -50 <0.05 Down 0.99 HL Down
FNF -0.55 -0.018 -27 0.063 Down 0.97 HL Down
DP / 666 FNC -0.021 -0.00069 -62 <0.05 Down 0.99 HL Down
FNF -0.36 -0.012 -63 <0.05 Down 0.99 HL Down
DOP / 671 FNC -0.003 -0.00009 -25 0.47 NS 0.76 L Down
FNF -0.03 -0.001 -17 0.95 NS 0.46 ALAN Down
TOC / 680 FNC -1.570 -0.052 -34 <0.05 Down 0.99 HL Down
FNF -17.35 -0.58 -24 <0.05 Down 0.99 HL Down
SSC/TSS Combined* FNC -26.2 -0.87 -49 0.07 Down 0.97 HL Down
FNF -1129 -38 -50 0.22 NS 0.90 L Down
SSC / 80154** FNC -8.33 -0.28 -16 0.36 NS 0.81 L Down
FNF 339 11 15 0.66 NS 0.662 L UP
SSC / 80154# FNC 4.760 0.16 8.9 0.7 NS 0.64 ALAN UP
FNF 917.2 31 40 0.45 NS 0.79 L UP
*Due to concern over some SS values a second run was completed with TSS substituted for SSC from 2010-2015, which yielded significantly different results.  This finding will be further explored and reported on in the final report. 
** Model runs with only suspect data removed
# Model runs with full dataset