EPA-OW: NRSA Water Quality 2013 (Boat): General water quality measurements in large non-wadeable rivers
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Official Method Name
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Section 4: Non-Wadeable Rivers-Water Quality (of National Rivers and Streams Assessment: Field Operations Manual (2013)) |
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Current Revision
| 2013 |
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Media
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WATER (Waterbody type - Non-wadeable stream) |
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Instrumentation
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Multiprobe sonde |
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Method Subcategory
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Physical |
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Method Source
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Citation
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Protocol
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EPA-841-B-12-009 - National Rivers and Streams Assessment: Field Operations Manual (2013) |
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Brief Method Summary
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Measure dissolved oxygen (DO), pH, temperature, and conductivity using a calibrated multi-parameter water quality meter (or sonde). Take the measurements mid-channel at the Xsite. Take the readings at 0.5 m depth. Measure the site depth accurately before taking the measurements. The water chemistry samples will be analyzed for total phosphorus (TP), total nitrogen (TN), total ammonia-nitrogen (NH4), nitrate (NO3), basic anions, cations, total suspended solids (TSS), turbidity, acid neutralizing capacity (ANC, alkalinity), dissolved organic carbon (DOC), and total organic carbon (TOC). You will also collect a 2-L sample in an amber Nalgene bottle to be filtered on shore for later analysis of chlorophyll a. |
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Scope and Application
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Methods described in this document are to be used specifically in work relating to the National Rivers and Streams Assessment. This document contains proceedures for how to take physical water quality measurements. |
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Applicable Concentration Range
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Interferences
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Take measurements at 0.5 m depth |
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Quality Control Requirements
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Calibrate the water quality meter (or sonde) and use manufacturer's instructions |
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Sample Handling
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Maximum Holding Time
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Relative Cost
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Unknown |
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Sample Preparation Methods
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Store all samples in darkness on ice in a closed cooler. |
