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Hudson River Basin NAWQA - Data Collection Networks

Hudson River Basin Study Unit - Cycle I (1993-1995) Sampling Networks

Sampling efforts completed as part of Cycle I of the Hudson NAWQA are listed below. Sites were selected based on land-use characteristics to help develop an understanding of how these characteristics influence water quality.

Network (number of sites), sampling frequency and period sampled

Basic Fixed Sites (14 sites) sampled monthly, April 1993-March 1995
Intensive Fixed Sites (3 sites) sampled weekly or monthly, April 1994-September 1995
2,4-d & Atrazine Survey (10 sites) sampled once in June 1993
Low-flow water-quality & ecological synoptic (44 sites) sampled once, August 1993
High-flow nutrient & sediment synoptic (44 sites) sampled once, April 1994
Bed Sediment Survey (45 sites) sampled once, August 1992-August 1994
Sewage Treatment Plant Samples (17 sites) sampled once or twice, July-August 1995
Basic Fixed Site Ecological Assessment (8 sites) sampled once annually for three years
Fish Tissue Survey (28 sites)
Fish Community and Habitat Survey (9 sites) sampled once 1995
Ecological Survey (31 sites) sampled once
Ground Water Study-Unit Survey (50 wells) sampled once
Ground Water Land-Use Survey (51 wells) sampled once
Ground Water Flow-Path Study (18 wells, 4 tile drains, 4 drainage ditches) 4 sets of samples

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