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Sample Design: Test Watershed Health and Salmon Recovery Study Design
Basics

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

Description

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Ecology's Environmental Assessment Program’s Status and Trends Monitoring for Watershed Health and Salmon Recovery (WHSR) project collects data on river and stream health by region. Approximately 350 sites are sampled every four years.

Sampling Schedules for Watershed Health Monitoring​ explains the monitoring-sites rotation, sample design, and contains the latest Candidate Site List.

​Latest River and Stream Monitoring for Watershed Health explains where Ecology staff are working during the monitoring season.

WSHR also offers services to the public for objectively assessing watershed health. These include standard protocols for monitoring rivers and streams, training on these protocols, the Washington Master Sample site set, and the STREAM database for managing stream habitat data.

Sample Design Parameters


Start Year

2009

Initiation Year

2009

Retirement Year

Study Plan

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Data Repositories

Photos

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Documents

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Map of Sites

  • Stratum
  • Panel
  • Occasion
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Area of Inference

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AOI Notes

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Master Sample

This sample design is based on master sample: Washington Statewide Master Sample

Details of this master sample:



Frame Definition

Frame

This sample design started with an initial frame of 387,237 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 14,212 sites:

Criteria Group 1
           
  Land Owner Name Is Not Equal To US Federal Government
AND

Criteria Group 2
           
  Frame Evaluation Is Equal To non-target OR
  Frame Evaluation Is Equal To pending OR
  Frame Evaluation Is Equal To target

Target Population

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Panels

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 (8 Year(s))
# Panel Name Panel Abbr. 1 2 3 4 5 6 7 8
1
Sentinel Sites
Sentinel
2
Rotating 1
RP1
3
Rotating 2
RP2
4
Rotating 3
RP3
5
Rotating 4
RP4

Stratification

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
  STATUS_TRENDS_REGIONS 8 Values: Coastal, Lower Columbia, Mid Columbia, No Region, Northeast Washington, Puget Sound, Snake River, Upper Columbia
  STRAH_ORD_GROUPS 5 Values: 0, 1, 2, 3, 4-11
Attributes # Sites In Frame Frame Length (km) Stratum Attributes Panels
STATUS_TRENDS_REGIONS STRAH_ORD_GROUPS Stratum Name Stratum Abbr. Rotating 1 Rotating 2 Rotating 3 Rotating 4 Sentinel Sites # of Sites
Coastal 0 645 0 Coastal-0 CS-0 0 10 0 0 0
Coastal 1 82 0 Coastal-1 CS-1 0 10 0 0 0
Coastal 2 29 0 Coastal-2 CS-2 0 10 0 0 0
Coastal 3 16 0 Coastal-3 CS-3 0 10 0 0 0
Coastal 4-11 16 0 Coastal-4-11 CS-4+ 0 10 0 0 0
Lower Columbia 0 509 0 Lower Columbia-0 LC-0 0 10 0 0 0
Lower Columbia 1 70 0 Lower Columbia-1 LC-1 0 11 0 0 0
Lower Columbia 2 18 0 Lower Columbia-2 LC-2 0 9 0 0 0
Lower Columbia 3 21 0 Lower Columbia-3 LC-3 0 10 0 0 0
Lower Columbia 4-11 28 0 Lower Columbia-4-11 LC-4+ 0 10 0 0 0
Mid Columbia 0 1876 0 Mid Columbia-0 MC-0 0 0 7 0 0
Mid Columbia 1 1005 0 Mid Columbia-1 MC-1 0 0 13 0 0
Mid Columbia 2 303 0 Mid Columbia-2 MC-2 0 0 10 0 0
Mid Columbia 3 157 0 Mid Columbia-3 MC-3 0 0 10 0 0
Mid Columbia 4-11 225 0 Mid Columbia-4-11 MC-4+ 0 0 10 0 0
No Region 0 268 0 No Region-0 NR-0 0 0 0 0 0
No Region 1 120 0 No Region-1 NR-1 0 5 0 0 0
No Region 2 39 0 No Region-2 NR-2 0 4 0 0 0
No Region 3 21 0 No Region-3 NR-3 0 5 0 0 0
No Region 4-11 26 0 No Region-4-11 NR-4+ 0 5 0 0 0
Northeast Washington 0 865 0 Northeast Washington-0 NE-0 0 0 0 7 0
Northeast Washington 1 210 0 Northeast Washington-1 NE-1 0 0 0 13 0
Northeast Washington 2 69 0 Northeast Washington-2 NE-2 0 0 0 10 0
Northeast Washington 3 46 0 Northeast Washington-3 NE-3 0 0 0 10 0
Northeast Washington 4-11 32 0 Northeast Washington-4-11 NE-4+ 0 0 0 10 0
Puget Sound 0 538 0 Puget Sound-0 PS-0 9 0 0 0 0
Puget Sound 1 124 0 Puget Sound-1 PS-1 10 0 0 0 0
Puget Sound 2 44 0 Puget Sound-2 PS-2 10 0 0 0 0
Puget Sound 3 18 0 Puget Sound-3 PS-3 10 0 0 0 0
Puget Sound 4-11 17 0 Puget Sound-4-11 PS-4+ 9 0 0 0 0
Snake River 0 1644 0 Snake River-0 SR-0 0 0 3 0 0
Snake River 1 1144 0 Snake River-1 SR-1 0 0 11 0 0
Snake River 2 337 0 Snake River-2 SR-2 0 0 10 0 0
Snake River 3 180 0 Snake River-3 SR-3 0 0 7 0 0
Snake River 4-11 223 0 Snake River-4-11 SR-4+ 0 0 18 0 0
Upper Columbia 0 2225 0 Upper Columbia-0 UC-0 0 0 0 5 0
Upper Columbia 1 642 0 Upper Columbia-1 UC-1 0 0 0 15 0
Upper Columbia 2 174 0 Upper Columbia-2 UC-2 0 0 0 9 0
Upper Columbia 3 67 0 Upper Columbia-3 UC-3 0 0 0 11 0
Upper Columbia 4-11 139 0 Upper Columbia-4-11 UC-4+ 0 0 0 10 0
TOTAL 0 km      

Generated Sample Sites

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: 14,212
Number of sites after generating the GRTS sample: 1,575
Number of oversamples: 1,209
Number of panels: 5
Number of strata: 40

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Sample Sites

Shapefile

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Distribution

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


Additional Design Documentation
Attributes
  Schema   Attribute   Description
Projection Details

PROJCS["NAD_1983_HARN_StatePlane_Washington_South_FIPS_4602_Feet", GEOGCS["GCS_North_American_1983_HARN", DATUM["D_North_American_1983_HARN", SPHEROID["GRS_1980",6378137.0,298.257222101]], PRIMEM["Greenwich",0.0], UNIT["Degree",0.0174532925199433]], PROJECTION["Lambert_Conformal_Conic"], PARAMETER["False_Easting",1640416.666666667], PARAMETER["False_Northing",0.0], PARAMETER["Central_Meridian",-120.5], PARAMETER["Standard_Parallel_1",45.83333333333334], PARAMETER["Standard_Parallel_2",47.33333333333334], PARAMETER["Latitude_Of_Origin",45.33333333333334], UNIT["Foot_US",0.3048006096012192]]

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