We sample to identify trends
The success of much of our environmental work hinges upon the health of the watersheds that support the natural environment, communities, and the economy. We monitor watershed health by studying various indicators, including water quality, and biological, riparian, and landscape indicators. We follow strict measurement, quality control and data management, review, and validation procedures to gain an accurate picture of watershed health.
We rotate through eight Status and Trends Regions (STRs) for each sampling round. Crews try to sample 50 sites in most STRs per round, 30 in the Unlisted STR. Also, we sample 16 sentinel sites each year to detect trends. There are two of these per region.
This table details when and where sampling rounds have occurred or are scheduled to occur in the future.
|Status and Trends Monitoring Regions
|Lower Columbia River
Watershed Health Monitoring 2019 is a two-page focus sheet describing this year's sampling project.
Candidate sampling sites
The Washington Master Sample is a statistically selected list of sites that can be used for conducting unbiased surveys at various scales, including statewide, status and trends in regions, or by watershed. Each year, we evaluate the master sample within the next scheduled status and trends region. Using maps, we evaluate each site on the list and reject sites that do not fit sample-design criteria as described in the protocols. The remaining sites provide a set of candidate sites for further studies to be conducted by sampling crews.
Sites are only accessed with permission of the landowners.
Map of candidate sites for 2019 in the Unlisted Washington Status & Trends Region
Click the legend button in the upper right hand corner to view the legend. Use the "select" widget, also in the upper right-hand corner to export candidate site data in a spreadsheet (CSV) format.