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Estimation of soil water evaporation from isotope hydrology methods in an agricultural field


Authors: Erik Oerter
Owners: iUTAH Data Manager · Erik Oerter
Resource type:Generic
Created:Aug. 26, 2017, 10:10 p.m.
Last updated: Aug. 27, 2017, midnight by Erik Oerter

Abstract

These data are from this publication: Oerter, E. J., Perelet, A., Pardyjak, E., & Bowen, G. (2017). Membrane inlet laser spectroscopy to measure H and O stable isotope compositions of soil and sediment pore water with high sample throughput. Rapid Communications in Mass Spectrometry, 31(1), 75-84.

Abstract:
RATIONALE: The fast and accurate measurement of H and O stable isotope compositions (δ2H and δ18O values) of soil and sediment pore water remains an impediment to scaling-up the application of these isotopes in soil and vadose hydrology. Here we describe a method and its calibration to measuring soil and sediment pore water δ2H and δ18O values using a water vapor-permeable probe coupled to an isotope ratio infrared spectroscopy analyzer.
METHODS: We compare the water vapor probe method with a vapor direct equilibration method, and vacuum extraction with liquid water analysis. At a series of four study sites in a managed desert agroecosystem in the eastern Great Basin of North America, we use the water vapor probe to measure soil depth profiles of δ2H and δ18O values.
RESULTS: We demonstrate the accuracy of the method to be equivalent to direct headspace equilibration and vacuum extraction techniques, with increased ease of use in its application, and with analysis throughput rates greater than 7 h1. The soil depth H and O stable isotope profiles show that soil properties such as contrasting soil texture and pedogenic soil horizons control the shape of the isotope profiles, which are reflective of local evaporation conditions within the soils.
CONCLUSIONS: We conclude that this water vapor probe method has potential to yield large numbers of H and O stable isotope analyses of soil and sediment waters within shorter timeframes and with increased ease than with currently existing methods.

Subject

soil water,isotope hydrology

How to cite

Oerter, E. (2017). Estimation of soil water evaporation from isotope hydrology methods in an agricultural field, HydroShare, http://dx.doi.org/10.4211/hs.1a7dc5d6b9fa4253bca442341eef500d

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

Spatial:

 Coordinate System/Geographic Projection:  WGS 84 EPSG:4326
 Coordinate Units:  Decimal degrees
Place/Area Name: Near SLC airport

Longitude
-112.0438°
Latitude
40.7959°

Temporal:

 Start Date:
 End Date:

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Authors

The people or organizations that created the intellectual content of the resource.

Name Organization Address Phone
Erik Oerter

Credits

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
National Science Foudation, iUTAH-innovative Urban Transitions and Aridregion Hydro-sustainability NSF Award Number 1208732

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