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Arizona Base-flow Index (HUC-8)


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Type: Resource
Storage: The size of this resource is 1.8 KB
Created: Nov 23, 2025 at 8:11 p.m. (UTC)
Last updated: Nov 24, 2025 at 2:37 p.m. (UTC)
Published date: Nov 24, 2025 at 2:37 p.m. (UTC)
DOI: 10.4211/hs.8f4e81e21cc64a18aff116f23608e8d7
Citation: See how to cite this resource
Content types: CSV Content 
Sharing Status: Published
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Abstract

This dataset provides long-term estimates of the Base-Flow Index (BFI) for all HUC-8 basins in Arizona from 1980 to 2020. BFI, representing the groundwater-derived portion of streamflow, was computed at gauged sites using recursive digital filtering and then regionalized to ungauged basins through an XGBoost regression framework. Climatic and topographic variables served as primary predictors to capture spatial controls on base-flow generation across Arizona’s diverse hydroclimatic gradients. The resulting product offers consistent, basin-scale BFI estimates suitable for hydrologic assessment, groundwater–surface water interaction studies, and evaluation of streamflow-associated recharge in data-limited regions.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
arizona
North Latitude
37.0428°
East Longitude
-109.0283°
South Latitude
31.4717°
West Longitude
-114.8291°

Temporal

Start Date:
End Date:

Content

Related Resources

This resource is referenced by https://doi.org/10.1016/j.ejrh.2025.102778

Credits

Contributors

People or Organizations that contributed technically, materially, financially, or provided general support for the creation of the resource's content but are not considered authors.

Name Organization Address Phone Author Identifiers
Abraham E Springer Northern Arizona University

How to Cite

Mroczek, C. (2025). Arizona Base-flow Index (HUC-8), HydroShare, https://doi.org/10.4211/hs.8f4e81e21cc64a18aff116f23608e8d7

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/
CC-BY

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