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Layer: Timing of Winter-Spring Runoff in the United States, 1940–2018 (ID: 3)

Name: Timing of Winter-Spring Runoff in the United States, 1940–2018

Display Field: StaName

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: This map shows changes in the timing of annual high spring flow carried by rivers and streams from 1940 to 2018. This analysis focuses on parts of the country where streamflow is strongly influenced by snowmelt. Trends are based on the winter-spring center of volume, which is the date when half of the total January 1–July 31 streamflow (in the West) or half of the total January 1–May 31 streamflow (in the East) has passed by each streamflow gauge, reflecting the timing of spring snowmelt. Blue triangles represent later timing of winter-spring runoff, and red triangles represent earlier timing of winter-spring runoff. Streamflow data were collected by the U.S. Geological Survey. For more information:

Copyright Text: EPA

Default Visibility: true

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON

Min Scale: 0

Max Scale: 0

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

Drawing Info: Advanced Query Capabilities:
HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Supported Operations:   Query   Generate Renderer   Return Updates

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