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Title: Baca geothermal demonstration project baseline ecosystem studies of cooling tower emission effects

Abstract

Results of baseline studies for boron, arsenic, mercury, and fluorine in vegetation and soil near the Baca Geothermal Demonstration Power Plant are provided for the 1980 sampling season. Preliminary results of visual vegetation assessments and population density studies of soil invertebrate fauna are also provided. Foliage samples were collected for chemical analysis on a total of 17 plots on 5 transects. Two to five plant species were sampled at each plot. Samples were collected in June-July and September. Soil samples were collected at each plot during September. Visual vegetation inspections were conducted along each transect. Eighty-eight soil samples were collected for soil invertebrate studies. Boron, arsenic, mercury, and fluorine levels in vegetation were within normal range for natural vegetation and crops. Concentrations of soil arsenic and mercury were comparable to foliage concentrations. Boron concentrations were lower in soil than in foliage, whereas soil fluorine concentrations were considerably higher than foliage concentrations. With the exception of heavy insect infestations in June-July, no vegetation abnormalities were noted. Preliminary soil invertebrate analysis indicated an overall arthropod density of approximately 100,000/m/sup 2/ which appears within the normal range encountered in forest and meadow soil.

Authors:
; ; ;
Publication Date:
Research Org.:
WESTEC Services, Inc., Albuquerque, NM (USA)
OSTI Identifier:
6508960
Report Number(s):
DOE/ET/27163-6
DOE Contract Number:
FC03-78ET27163
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; 54 ENVIRONMENTAL SCIENCES; ARSENIC; ABUNDANCE; BACA GEOTHERMAL FIELD; BASELINE ECOLOGY; ENVIRONMENTAL IMPACTS; BORON; FLUORINE; MERCURY; PLANTS; CHEMICAL ANALYSIS; SOILS; ARTHROPODS; ASPENS; BIRCHES; CONIFERS; GEOCHEMISTRY; GEOTHERMAL POWER PLANTS; GRASS; INVERTEBRATES; OAKS; PINES; SAMPLING; ANIMALS; CHEMISTRY; ECOLOGY; ELEMENTS; GEOTHERMAL FIELDS; HALOGENS; METALS; NONMETALS; POWER PLANTS; SEMIMETALS; THERMAL POWER PLANTS; TREES; Geothermal Legacy

Citation Formats

Leitner, P., Osterling, R., Price, D., and Westermeier, J. Baca geothermal demonstration project baseline ecosystem studies of cooling tower emission effects. United States: N. p., 1981. Web. doi:10.2172/6508960.
Leitner, P., Osterling, R., Price, D., & Westermeier, J. Baca geothermal demonstration project baseline ecosystem studies of cooling tower emission effects. United States. doi:10.2172/6508960.
Leitner, P., Osterling, R., Price, D., and Westermeier, J. Sun . "Baca geothermal demonstration project baseline ecosystem studies of cooling tower emission effects". United States. doi:10.2172/6508960. https://www.osti.gov/servlets/purl/6508960.
@article{osti_6508960,
title = {Baca geothermal demonstration project baseline ecosystem studies of cooling tower emission effects},
author = {Leitner, P. and Osterling, R. and Price, D. and Westermeier, J.},
abstractNote = {Results of baseline studies for boron, arsenic, mercury, and fluorine in vegetation and soil near the Baca Geothermal Demonstration Power Plant are provided for the 1980 sampling season. Preliminary results of visual vegetation assessments and population density studies of soil invertebrate fauna are also provided. Foliage samples were collected for chemical analysis on a total of 17 plots on 5 transects. Two to five plant species were sampled at each plot. Samples were collected in June-July and September. Soil samples were collected at each plot during September. Visual vegetation inspections were conducted along each transect. Eighty-eight soil samples were collected for soil invertebrate studies. Boron, arsenic, mercury, and fluorine levels in vegetation were within normal range for natural vegetation and crops. Concentrations of soil arsenic and mercury were comparable to foliage concentrations. Boron concentrations were lower in soil than in foliage, whereas soil fluorine concentrations were considerably higher than foliage concentrations. With the exception of heavy insect infestations in June-July, no vegetation abnormalities were noted. Preliminary soil invertebrate analysis indicated an overall arthropod density of approximately 100,000/m/sup 2/ which appears within the normal range encountered in forest and meadow soil.},
doi = {10.2172/6508960},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 1981},
month = {Sun Mar 01 00:00:00 EST 1981}
}

Technical Report:

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  • An equation-of-state package for water-carbon dioxide mixtures has been constructed from available thermodynamic data that covers the range of interest to the Baca reservoir system. The package has been used to examine the thermodynamic state of the Baca reservoir fluid for conditions of temperature, pressure and CO/sub 2/ content believed to bracket conditions existing at the production depth of the wells in the Redondo Creek area. It is shown that the reservoir fluid may be either all-liquid or two-phase at various well locations and depths, depending on the CO/sub 2/ content. It is also shown that the CO/sub 2/ contentmore » at reservoir conditions cannot be reliably inferred from pressure/temperature measurements made on flowing wells. The equation-of-state package has been incorporated into a general purpose geothermal reservoir simulator and a series of calculations made which show that the CO/sub 2/ content of the produced fluid may be less than or greater than that of the reservoir fluid. The characteristics of the produced fluid are sensitive to the CO/sub 2/ content in the reservoir.« less
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