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EMMALAB v. 1.1: Software for improved endmember mixing analysis

An older version of this resource http://www.hydroshare.org/resource/58b0f961c81a41939415526c8ad78d33 is available.

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Created:	May 09, 2025 at 9:35 p.m.
Last updated:	May 21, 2025 at 9:32 p.m.
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Abstract

Quantifying water sources to rivers and streams is critical for managing water resources globally. Endmember mixing analysis (EMMA) is a commonly applied method to water sources to streams that uses tracers for hydrograph separation. Most EMMA applications follow similar methods, but several choices must be made such as selecting tracers, endmembers, and stream locations for mixing. With no standardized EMMA approach, these choices may be made subjectively with little regard for resulting errors. We created an open-source software program called EMMALAB, developed in Matlab App Designer, to simplify and standardize the workflow associated with EMMA. EMMALAB guides the user through a uniform process to visualize and select endmembers via principal components analysis, calculate the fractional contribution of each endmember, and calculate errors in the mixing analysis. The files in this HydroShare resource include: EMMALAB v. 1.1 installers for Mac and PC, a dataset template, two example Provo River datasets (Soapstone and nested catchment), and the transcript for a YouTube video that provides instructions for using the software. The Provo River nested catchment dataset is the example data used in the training video. A web version of the software is available at: https://geologymatlab.byu.edu:9988/webapps/home/.

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Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

North Latitude

40.7693°

East Longitude

-110.7126°

South Latitude

40.3938°

West Longitude

-111.5421°

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Related Resources

This resource updates and replaces a previous version

Thompson, A. N., B. R. Bickmore, E. J. Evans, G. T. Carling (2024). EMMALAB v. 1.0: Software for improved endmember mixing analysis, HydroShare, http://www.hydroshare.org/resource/58b0f961c81a41939415526c8ad78d33

Credits

Funding Agencies

This resource was created using funding from the following sources:

Agency Name	Award Title	Award Number
National Science Foundation	Dust in the Critical Zone from the Great Basin to the Rocky Mountains	EAR-2012093
National Science Foundation	A machine-learning approach to quantitative phase analysis of whole rocks and sediments	EAR-2005432

How to Cite

Thompson, A. N., B. R. Bickmore, E. J. Evans, G. T. Carling (2025). EMMALAB v. 1.1: Software for improved endmember mixing analysis, HydroShare, http://www.hydroshare.org/resource/90ad78faec9f41c180d9057b9e815785

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

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

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