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ChemLotUS: A Benchmark Dataset of Lotic Chemistry across US River Networks

An older version of this resource http://www.hydroshare.org/resource/595e2ba483524feba22273e4dfbed190 is available.

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Type:	Resource
Storage:	The size of this resource is 1.2 GB
Created:	May 12, 2025 at 8:27 p.m.
Last updated:	May 16, 2025 at 7:26 p.m. (Metadata update)
Published date:	May 16, 2025 at 5:45 p.m.
DOI:	10.4211/hs.9b2b865acc51481babc74599470a3bfc
Citation:	See how to cite this resource

Sharing Status:	Published
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Abstract

ChemLotUS contains water quality information in rivers and streams carefully curated and linked to a high resolution stream network. The dataset covers the contiguous United States (CONUS) with nearly 35 million records in about 290,000 sites. 11 water constituents are included so far: Calcium (Ca), Electrical Conductivity (EC), pH, Total Suspended Solids (TSS), Turbidity (Tu), Total Organic Carbon (TOC), Dissolved Oxygen (DO), Chlorophyll a (Chl-a), Nitrate (NO3), Soluble Reactive P (SRP), and Total P (TP). Raw water quality data comes from the Water Quality Portal (WQP - https://www.waterqualitydata.us/) and network information comes from the National Hydrography Dataset High Resolution (NHD-HR - https://www.usgs.gov/national-hydrography/nhdplus-high-resolution)

The repository contains the ChemLotUS dataset, as well as the code developed to obtain it, following the structure described on the Readme1 file.
The Readme2 file contains the definitions of the columns contained in each of the csv files comprised in the dataset.

This version is preferred over the two previous ones, considering the following differences:

1. With DOI: 10.4211/hs.595e2ba483524feba22273e4dfbed190 (Apr 10, 2025): During a workshop conducted in May 5 - 9, 2025 at UF using this previous version, we identified potential outliers not identified as such in the csv files. The new version solves this issue.
2. With DOI: 10.4211/hs.266099a29929423e9cec8bdb886b6a21 (Aug 26, 2024): Noting that this is the version originally submitted to peer review, the subsequent versions follow the recommendations made by the reviewers.

More details about the ChemLotUS dataset, including the methods employed to obtain it and several example use cases, are presented in the homonymous paper "ChemLotUS: A Benchmark Dataset of Lotic Chemistry across US River Networks", published on May 2025 in Water Resources Research (https://doi.org/10.1029/2024WR039355)

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

Conterminous United States

North Latitude

49.8296°

East Longitude

-65.7395°

South Latitude

24.0346°

West Longitude

-126.5607°

Temporal

Start Date:
End Date:

Content

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Related Geospatial Features

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Related Resources

This resource updates and replaces a previous version

Fernandez, N., M. J. Cohen, J. W. Jawitz (2025). ChemLotUS: A Benchmark Dataset of Lotic Chemistry across US River Networks, HydroShare, http://www.hydroshare.org/resource/595e2ba483524feba22273e4dfbed190

Credits

Funding Agencies

This resource was created using funding from the following sources:

Agency Name	Award Title	Award Number
U.S. National Science Foundation	EAR-Climate: Continental-Scale Determinants of Stream Solute Spatial and Temporal Patterns	EAR-2129926

How to Cite

Fernandez, N., M. J. Cohen, J. W. Jawitz (2025). ChemLotUS: A Benchmark Dataset of Lotic Chemistry across US River Networks, HydroShare, https://doi.org/10.4211/hs.9b2b865acc51481babc74599470a3bfcCrossRefSubmissionStatus.PENDING

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

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

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