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Mobile sediment in an urbanizing karst aquifer: Implications for contaminant transport

Environmental Geology

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Abstract

Here we investigate geochemical characteristics of sediment in different compartments of a karst aquifer and demonstrate that mobile sediments in a karst aquifer can exhibit a wide range of properties affecting their contaminant transport potential. Sediment samples were collected from surface streams, sinkholes, caves, wells, and springs of a karst aquifer (the Barton Springs portion of the Edwards (Balcones Fault Zone) Aquifer, Central Texas) and their mineralogy, grain-size distribution, organic carbon content, and specific surface area analyzed. Statistical analysis of the sediments separated the sampling sites into three distinct groups: (1) streambeds, sinkholes, and small springs; (2) wells; and (3) caves. Sediments from the primary discharge spring were a mix of these three groups. High organic carbon content and increased potential to transport contaminants; the volume of these sediments is likely to increase with continued urbanization of the watershed.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Mobile sediment in an urbanizing karst aquifer: Implications for contaminant transport
Series title:
Environmental Geology
Volume
39
Issue:
1
Year Published:
2000
Language:
English
Publisher:
Springer-Verlag GmbH & Company KG
Publisher location:
Berlin, Germany
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
25
Last page:
38
Number of Pages:
14