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Arizona Topographic Relative Moisture Index (TRMI)

Authors:
Owners:		This resource does not have an owner who is an active HydroShare user. Contact CUAHSI (help@cuahsi.org) for information on this resource.
Type:	Resource
Storage:	The size of this resource is 6.7 GB
Created:	May 05, 2025 at 5:38 p.m. (UTC)
Last updated:	Feb 26, 2026 at 9:53 p.m. (UTC) (Metadata update)
Published date:	Jun 18, 2025 at 5:36 p.m. (UTC)
DOI:	10.4211/hs.6cc17c1cf6e0445a93d78b065e102d41
Citation:	See how to cite this resource
Content types:	Geographic Feature Content Geographic Raster Content

Sharing Status:	Published
Views:	1703
Downloads:	79
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Abstract

Version 2025.V.1

The Topographic Relative Moisture Index (TRMI) is a terrain-based index that estimates how wet or dry a location is likely to be based on its topographic attributes. TRMI incorporates several topographic parameters that influence moisture dynamics, including slope gradient, aspect, relative elevation (or topographic position), and landscape convexity or concavity [@parker1982]. Unlike purely hydrologic models (which might require soil or rainfall data), TRMI infers relative soil moisture patterns from topography. It’s based on the idea that topography controls moisture accumulation. This raster data layer was created to assist in mapping suitability for groundwater recharge potential throughout the State of Arizona.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

Arizona

North Latitude

37.9929°

East Longitude

-107.3500°

South Latitude

30.5200°

West Longitude

-115.4300°

Content

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Data Services

The following web services are available for data contained in this resource. Geospatial Feature and Raster data are made available via Open Geospatial Consortium Web Services. The provided links can be copied and pasted into GIS software to access these data. Multidimensional NetCDF data are made available via a THREDDS Data Server using remote data access protocols such as OPeNDAP. Other data services may be made available in the future to support additional data types.

Related Resources

This resource belongs to the following collections:

Title	Owners	Sharing Status	My Permission
Arizona Tri-University Recharge & Water Reliability Project (ATUR)	Marlana Hinkley · Neha Gupta	Private & Shareable	None

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
Neha Gupta	University of Arizona	AZ, US

How to Cite

Lima, R., A. E. Springer, T. Sankey (2026). Arizona Topographic Relative Moisture Index (TRMI), HydroShare, https://doi.org/10.4211/hs.6cc17c1cf6e0445a93d78b065e102d41, DOI for this published resource is pending activation.

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

http://creativecommons.org/licenses/by-nc/4.0/

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