- ID: 16334
- State: Published
- Owner: Nicole Cappuccio
- Spatial Design Category: Generalized Random Tessellation Stratified (GRTS)
- Sites in Design: 40
- Has Location Privacy: No
- Data Repository: <none>
This Design was developed as part of the AIM strategy to assess Land Use Plan/Resource Management Plan effectiveness. Includes only points on all perennial BLM streams and rivers in the Sierra Front BLM Field office. Previously assessed points from the NV statewide and WRSA projects 2013-2015 will be used as a user sampled to ensure spatial balance of new points aroung locations we have visited previously. These location include non-target (e.g., dry sites), inaccessible, and sampled sites. See the AIM strategy to understand our rejection criteria (reason a point is not sampled).
Sample Design Parameters
- Has user sites
- 1 Panel
- Is stratified
Map of Sites
Area of Inference
This sample design started with an initial frame of 67,033 sites, based on its master sample. The criteria (based on the master sample's attributes) were then used to refine the sample frame down to 178 sites:
All perennial streams and rivers on BLM land within the Sierra Front Office.
Below is a list of User Samples from which this design is drawing sites.
Panel designs can help address sampling objectives by increasing the total number of samples at a lower overall cost. A common panel structure involves one or more panels with a high revisit frequency (e.g. an “Annual” panel), and other panels with a lower revisit frequency (e.g. a three year “Rotating” panel).
|Panel||Sampling Occasion (1 Year(s))|
|#||Panel Name||Panel Abbr.||1|
This design uses the following attributes to create the stratification shown below. Each row in the table represents a stratum. This design’s panels are also shown in the table, even if it uses only a single, default panel.
|Attribute||Values In Frame|
|Stream_Order_Group||3 Values: Large Streams (3&4), Rivers (5+), Small Streams (1&2)|
|Attributes||# Sites In Frame||Frame Length (km)||Stratum Attributes||Panels|
|Stream_Order_Group||Stratum Name||Stratum Abbr.||2019|
|Large Streams (3&4)||58||0||Large Streams (3&4)||LS||7|
|Rivers (5+)||35||0||Rivers (5+)||RV||3|
|Small Streams (1&2)||94||0||Small Streams (1&2)||SS||10|
Below is the complete list of sample sites that were drawn using the criteria for this sample design.
|Number of sites before generating the GRTS sample:||178|
|Number of sites after generating the GRTS sample:||40|
|Number of oversamples:||20|
|Number of panels:||1|
|Number of strata:||3|