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Evapotranspiration Measured at two Rangeland sites in Victoria County, South-Central Texas, 2015-2018

Metadata Updated: October 28, 2023

The U.S. Geological Survey and Desert Research Institute, in cooperation with the Natural Resources Conservation Service, Texas State Soil and Water Conservation Board, Victoria County Groundwater Conservation District, Victoria Soil and Water Conservation District, and the San Antonio River Authority, evaluated the hydrologic effects of Vachellia farnesiana var. farnesiana (huisache) removal on rangeland evapotranspiration in Victoria County, Texas. Measurements of evapotranspiration (ET), rainfall, and related properties were made at two sites during March 2015 through August 2018. One site was predominately grassland. The other site was dominated by dense huisache vegetation that was removed about halfway through the study period. To obtain the meteorological and surface energy flux data needed for the calculation of ET, the two sites were instrumented with LI-COR Biosciences eddy-covariance systems (LI-COR Biosciences, 2019). The resulting ET data were examined for differences between the locations and differences between the pre-removal (2015–16) and post-removal (2017–18) periods to assess the effects of huisache removal on ET. ET measurements were made using the eddy-covariance method and were supplemented by remote-sensing estimates of ET derived from thermal and optical satellite images. The data presented in this data release include various types of meteorological data (for example air temperature, relative humidity, wind speed and direction, and precipitation) and various energy flux data pertaining to ET (for example latent and sensible heat flux). Turbulent fluxes were compared to measured radiative fluxes to assess the energy budget. The sensible-heat flux was computed by taking variations in temperature into consideration. The relation between a given ET rate and the associated latent-heat flux was calculated. Details of the various energy flux calculation are described in the LI-COR Biosciences, 2016. The methods are further described along with the results of the study in the companion report (U.S. Geological Survey Scientific Investigations report 2020-XXX).

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 28, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 28, 2023
Publisher U.S. Geological Survey
Identifier USGS:5ddc458ce4b06957976a6a7c
Data Last Modified 20200827
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id a6b965d2-943a-4859-90a6-5407f427af67
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -97.3126,28.3182,-96.6885,28.869
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 3d5228a5055fecf1f02e286be9a72c4035664814f2dab976bd9a2c3d1f5f6266
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -97.3126, 28.3182, -97.3126, 28.869, -96.6885, 28.869, -96.6885, 28.3182, -97.3126, 28.3182}

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