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Sample Design: CanyonCountryDistrict

Study Design: BLM AIM Assessment, Inventory, and Monitoring (AIM) of Wadeable Lotic Systems

Sample Design: CanyonCountryDistrict
ID: 2605
State: Finalized
  • State: Finalized
  • Owner: Scott Miller
  • Spatial Design Category: Generalized Random Tessellation Stratified (GRTS)
  • Data Repository: <none>
  • Snapshot: 4/12/2017
  • Snapshot by: Scott Miller
  • Sites in Design: 153
  • Has Location Privacy: No

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The details of this Sample Design, including all the parameters used to generate it, are included below. Sample designs must belong to a Study Design.


Design for perennial streams and rivers on BLM lands within the Moab and Monticello Field Offices

Sample Design Parameters

Start Year


Study Design

BLM AIM Assessment, Inventory, and Monitoring (AIM) of Wadeable Lotic Systems





Map of Sites

Stratum Panel Occasion

Area of Inference


AOI Notes


This sample design is based on master sample: Bureau of Land Management Lotic

Details of this master sample:


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 780 sites:

Criteria Group 1
  BLM District Is Equal To Canyon Country

Target Population

Perennial streams and rivers on BLM lands within the Moab and Monticello FOs

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 (2 Year(s))
# Panel Name Panel Abbr. 1
Year 1
Year 2

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.

Sample Attributes
  Attribute   Values In Frame
  ADMU_ADMU_NAME 2 Values: Moab, Monticello
  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
ADMU_ADMU_NAME Stream_Order_Group Stratum Name Stratum Abbr. Year 1 Year 2 # of Sites
Moab Large Streams (3&4) 212 0 Moab-Large Streams (3&4) S0 6 6
Moab Rivers (5+) 104 0 Moab-Rivers (5+) S1 1 2
Moab Small Streams (1&2) 243 0 Moab-Small Streams (1&2) S2 8 7
Monticello Large Streams (3&4) 111 0 Monticello-Large Streams (3&4) S3 6 6
Monticello Rivers (5+) 33 0 Monticello-Rivers (5+) S4 0 1
Monticello Small Streams (1&2) 77 0 Monticello-Small Streams (1&2) S5 4 4
TOTAL 0 km      

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: 780
Number of sites after generating the GRTS sample: 153
Number of oversamples: 102
Number of panels: 2
Number of strata: 6




The histogram charts below show the distribution of this sample design’s sites across the various panels and strata.

  Schema   Attribute   Description