Welcome to the CHaMP_Metrics wiki!
Rationale and Background
Metrics are information resulting from the reduction or processing of measurements taken at a site within a particular temporal period, while indicators result from the reduction of metrics across sites and temporal periods.
Measurements and Metrics were included in the CHaMP protocol if the following three conditions were met:
- Information Content: Habitat metrics and indicators must provide information directly related to salmonid productivity, including survival and growth, as documented by peer reviewed literature, modeling, or existing data analysis.
- Data Form: Habitat metrics and indicators must provide statistical information with robust data quality. The data generated for a prospective metric must be repeatable, detect heterogeneity, and have adequate properties for modeling/statistics (e.g., variance distributions must meet statistical assumptions for modeling or testing).
- Feasibility: Habitat metrics and indicators need to be generated by field tools or software that are readily implementable as of the time field testing in fall 2010 (i.e., does not rely on future technological advances). Feasibility is also bounded by the need to fit all survey work within a three-person-day field survey at 80-90 percent of all sites likely to be encountered.
The habitat quality and quantity indicators in the CHaMP protocol have been designed specifically to evaluate the features of stream habitat critical to juvenile salmonid growth and survival from egg to smolt life stages.