SNAP

Unadilla River at Rockdale, NY

Overview
  • Station Id: 01502500
  • County: Chenango
  • Drainage Area: 520 sq.mi.
  • Station Coordinates: 42.379°, -75.406°
  • Period of record: 10/05 to present
Location Description

Station is on bridge 0.09 miles east of Rockdale on CR 40.

Data

2016 Land Use

Urban Agricultural Agricultural Forested Other
Row Crops Pasture/Hay Total
5% 7% 27% 33% 54% 8%
Site Drainage Area

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Clear
2022 Flow Normalized Trends
Trend period (Water Year*) 2006-2022
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
Rockdale 2006-2022 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 0.1059098 0.9509804 HL UP 0.0720867 0.9313725 VL UP
Nitrate-Nitrite 0.1212631 0.9901961 HL UP 0.0854415 0.9705882 HL UP
Ammonia -0.0223317 0.9901961 HL DWN -0.0233807 0.9901961 HL DWN
Dissolved Nitrogen 0.0988890 0.9313725 VL UP 0.0717793 0.8921569 L UP
Nitrate-Nitrite 0.1575425 0.9901961 HL UP 0.1214194 0.9901961 HL UP
Ammonia -0.0176096 0.9901961 HL DWN -0.0193293 0.9901961 HL DWN
Total Phosphorus -0.0331720 0.9901961 HL DWN -0.0374077 0.9901961 HL DWN
Particulate Phosphorus -0.0046317 0.8725490 L DWN -0.0066526 0.7352941 L DWN
Dissolved Phosphorus -0.0245825 0.9901961 HL DWN -0.0260738 0.9901961 HL DWN
Orthophosphate -0.0260101 0.9901961 HL DWN -0.0259234 0.9901961 HL DWN
Total Organic Carbon 0.0212526 0.6176471 ALAN NS 0.0965085 0.7549020 L UP
Total Suspended Solids -1.1996106 0.6960784 L DWN -0.9477129 0.5000000 ALAN NS
Suspended Sediment 2.2277832 0.7745098 L UP 2.5193133 0.5588235 ALAN NS