Name: USGS Streamflow Gauge 7-day minimums

Display Field: STATION_ID

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: This layer displays empirically derived low flow metrics from sites with continuous USGS flow gauges. Data are displayed for two commonly used low flow statistics, 7Q2 and 7Q10, which is the minimum seven-day mean streamflow (cfs) that occurs every two, and ten years, respectively. USGS gauges in Wisconsin were found by downloading the “USGS Gage Stations” available on the WDNR Surface Water Data Viewer. For each USGS gage daily streamflow data were download using the dataRetrieval (v2.7.4) R package on August 6th, 2018. Data are available for each metric if the minimum required data exists (i.e. two years of record for 7Q2 and ten years for 7Q10). A full year of record was limited to years were at least 325 daily streamflow measurements were recorded. However, users should beware that values calculated from the minimum required data maybe unreliable depending on the specific weather patterns in that timeframe. Gauges with three times the minimum required data (i.e. six years for 7Q2 and 30 years for 7Q10) will likely provide more reliable estimates. 7Q2 and 7Q10 estimates are available for the majority of stream reaches on the Wisconsin Hydrography Database estimated from USGS “Low-Flow Characteristics of Streams…” USGS Water Resource Investigations, or WDNR calculations created using the USGS methods. See the HYDRO_VA_7QX_Flow layer available on the WPDES Viewer for these additional low flow metrics.

Copyright Text: Ben Kort, Mike Shupryt, WQ Bureau

Default Visibility: true

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON

Min Scale: 10000000

Max Scale: 1

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: 298352.2401727068
YMin: 226362.22327551153
XMax: 714394.2669048824
YMax: 714487.2859462453
Spatial Reference: 3071  (3071)

Drawing Info:

Renderer:
Simple Renderer:
Symbol:
Label:
Description:
Transparency: 0
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• SHAPE ( type: esriFieldTypeGeometry, alias: SHAPE )
• STATION_ID ( type: esriFieldTypeString, alias: Station Id, length: 50 )
• F7Q2_EMPIRICAL ( type: esriFieldTypeDouble, alias: 7-day, 2-year low flow (cfs) )
• F7Q10_EMPIRICAL ( type: esriFieldTypeDouble, alias: 7-day, 10-year low flow (cfs) )
• F30Q5_EMPIRICAL ( type: esriFieldTypeDouble, alias: 30-day, 5-year low flow )
• F1Q10_EMPIRICAL ( type: esriFieldTypeDouble, alias: 1-day, 10-year low flow )
• ANNUAL_BASEFLOW_AVG ( type: esriFieldTypeDouble, alias: Annual Baseflow Average )
• YEARS_OF_RECORD ( type: esriFieldTypeInteger, alias: Years of Record )
• LAST_YEAR ( type: esriFieldTypeString, alias: Last Year, length: 5 )
• FIRST_YEAR ( type: esriFieldTypeString, alias: First Year, length: 5 )
• GAGENAME ( type: esriFieldTypeString, alias: Gage Name, length: 255 )
• DRAINAGEAREA_MI2 ( type: esriFieldTypeInteger, alias: Drainage Area mi2 )

Supported Operations:   Query   Query Attachments   Generate Renderer   Return Updates

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