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
2019 Flow Normalized Trends
Trend period (Water Year*) 2006-2019
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
Rockdale 2006-2019 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 0.105 0.93 VL UP 0.075 0.91 VL UP
Nitrate-Nitrite 0.114 0.95 HL UP 0.078 0.87 L UP
Ammonia -0.024 0.99 HL DOWN -0.028 0.99 HL DOWN
Dissolved Nitrogen 0.136 0.93 VL UP 0.094 0.87 L UP
Nitrate-Nitrite 0.140 0.95 HL UP 0.100 0.93 VL UP
Ammonia -0.019 0.99 HL DOWN -0.023 0.99 HL DOWN
Total Phosphorus -0.036 0.99 HL DOWN -0.044 0.99 HL DOWN
Particulate Phosphorus -0.005 0.97 HL DOWN -0.010 0.91 VL DOWN
Dissolved Phosphorus -0.025 0.99 HL DOWN -0.027 0.99 HL DOWN
Orthophosphate -0.026 0.99 HL DOWN -0.028 0.99 HL DOWN
Total Organic Carbon -0.072 0.68 L DOWN 0.063 0.62 ALAN NS
Total Suspended Solids -0.597 0.62 ALAN NS -1.385 0.56 ALAN NS
Suspended Sediment -0.561 0.68 L DOWN -5.418 0.68 L DOWN