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A high-resolution database of within-city tap water isotope variability in Trinidad


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Created: Jun 20, 2026 at 10:19 p.m. (UTC)
Last updated: Jun 20, 2026 at 10:46 p.m. (UTC)
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Abstract

This work presents a georeferenced stable isotope dataset from the island of Trinidad, comprising 309 water samples collected between 2018 and 2026. The dataset includes measurements of δ¹⁸O, δ²H, and d-excess, together with sampling date and geographic coordinates. Samples represent four major water types: precipitation (n = 72), tap water (n = 215), groundwater from wells (n = 13), and rivers and streams (n = 9). The observations span a wide isotopic range (δ¹⁸O: −8.74 to +1.01‰; δ²H: −56.47 to +18.63‰), reflecting the influence of precipitation variability, water-source mixing, tap water distribution, and hydrological processes operating across the island. By integrating precipitation, surface water, groundwater, and distributed drinking-water samples, the dataset provides a unique baseline for characterizing the isotopic composition of Trinidad’s water resources. The database supports applications in hydrology, hydrogeology, ecohydrology, and water-resource management, while also contributing to regional efforts to improve stable isotope data coverage in the tropical Caribbean. The dataset is intended to facilitate future studies of water provenance, recharge processes, catchment functioning, and climate-water interactions in small tropical island environments.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Trinidad
North Latitude
10.8929°
East Longitude
-60.7434°
South Latitude
9.9854°
West Longitude
-62.0123°

Temporal

Start Date:
End Date:

Content

Credits

Funding Agencies

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
UT System STARs Program None AR911486
The University of Texas-Arlington None 314075

How to Cite

Sánchez-Murillo, R., S. Soodeen, A. Mahabir, K. F. Farrick (2026). A high-resolution database of within-city tap water isotope variability in Trinidad, HydroShare, http://www.hydroshare.org/resource/65b28d1109c2497290a3a45fc7985408

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

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

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