Protocols for collecting data at sample sites
Before collecting data on the selected units, procedures on how the information will be obtained are needed. The term, response design, is used for the collection of procedures for data collection at a site.
How data is collected on an aquatic resource, such as a stream, can impact the interpretation of the survey results.
Explicit, precise protocols are needed for each type of data to be collected.
- Type and size of field plot
- Guidance for sample collection
- Specifies instrumentation to use,
- Preservation/handling of field samples,
- QA/QC, Data recording, etc.
- Consistent application of the response design is required in order to achieve consistent, comparable data.
The time period within a year selected for measurement (ecologically based). Measurements may be taken once or more often during the time period, with the response design providing the protocol for obtaining a single value for each indicator. Indicator variability within Index period contributes to non-survey sampling error.
National Environmental Methods Index (NEMI)
The purpose of NEMI is to provide a mechanism to compare and contrast the performance and relative cost of analytical, test, and sampling methods for environmental monitoring based on analyte, media, and performance data.