Triple isotope variations of monthly tap water in China

Abstract

Tap water isotopic compositions could potentially record information on local climate and water management practices. A new water isotope tracer 17O-excess became available in recent years providing additional information of the various hydrological processes. Detailed data records of tap water 17O-excess have not been reported. In this report, monthly tap water samples (n = 652) were collected from December 2014 to November 2015 from 92 collection sites across China. The isotopic composition (δ2H, δ18O, and δ17O) of tap water was analyzed by a Triple Water Vapor Isotope Analyzer (T-WVIA) based on Off-Axis Integrated Cavity Output Spectroscopy (OA-ICOS) technique and two second-order isotopic variables (d-excess and 17O-excess) were calculated. The geographic location information of the 92 collection sites including latitude, longitude, and elevation were also provided in this dataset. This report presents national-scale tap water isotope dataset at monthly time scale. Researchers and water resource managers who focus on the tap water issues could use them to probe the water source and water management strategies at large spatial scales.

Variation of tap-water isotope ratios and municipal water sources across Kyiv city, Ukraine

“…Numerous studies have incorporated stable isotopes of tap water to investigate patterns of water sources and timing of these sources, from local and regional to country-wide scales e.g. [9,11,12,[14][15][16][17][18][19][20].…”

Investigating the role of evaporation in dew formation under different climates using 17O-excess

“…Recent studies also show that the relationship between δ′ 18 O and δ′ 17 O can be used to better reveal tap water and precipitation formation mechanisms (Tian et al, 2020;, differentiate synoptic drought and local drought (Kaseke et al, 2018), and distinguish fog and dew (Kaseke et al, 2017).…”