Assessing and modeling irrigation-induced selenium in the stream-aquifer system of the Lower Arkansas River Valley, Colorado
dc.contributor.author | Herting, Alexander W., author | |
dc.contributor.author | Gates, Timothy K., author | |
dc.contributor.author | Colorado State University, publisher | |
dc.date.accessioned | 2020-01-30T15:47:36Z | |
dc.date.available | 2020-01-30T15:47:36Z | |
dc.date.issued | 2006 | |
dc.description | 2006 annual AGU hydrology days was held at Colorado State University on March 20 - March 22, 2006. | |
dc.description | Includes bibliographical references. | |
dc.description.abstract | Water quality data on dissolved selenium (Se) have been collected since April 2003 in a study area of the irrigated lower Arkansas River Valley, Colorado. Data have been obtained from 22 surface water locations and from 59 ground-water monitoring wells using low-flow sampling techniques. GIS mapping and statistical analysis were used to characterize the occurrence, severity, and spatial-temporal distribution of Se in the study area. Results indicate dissolved Se concentrations ranging from about 0 to 3760 micrograms per liter (μg/l), with a median of 16.6 (μg/l) in the ground water, including three significant "hot spots". River concentrations range from 4.2 to 23.0 μg/l, often exceeding stream standards for aquatic habitat. Relationships are explored between Se concentrations and more-easily-monitored indicators such as electrical conductivity, sulfate concentration, and nitrate concentration. Statistically significant non-linear relationships exist between Se, sulfate, and nitrate con-centration. Uranium (U) concentrations also are found to have a significant relationship with Se. Since high U concentrations have earlier been linked to marine shale and shale-derived soils in the Valley, the relationship between U and Se concentrations suggests a similar linkage between Se and the presence of shale formations. This relationship will be explored further with additional sampling events to test its validity A model of the selenium transport process in the unconfined aquifer, as affected by irrigation practices, is currently being developed and will be calibrated using field data. | |
dc.format.medium | born digital | |
dc.format.medium | proceedings (reports) | |
dc.identifier.uri | https://hdl.handle.net/10217/200627 | |
dc.identifier.uri | http://dx.doi.org/10.25675/10217/200627 | |
dc.language | English | |
dc.language.iso | eng | |
dc.publisher | Colorado State University. Libraries | |
dc.relation.ispartof | Hydrology Days | |
dc.rights | Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. | |
dc.title | Assessing and modeling irrigation-induced selenium in the stream-aquifer system of the Lower Arkansas River Valley, Colorado | |
dc.title.alternative | Hydrology days 2006 | |
dc.title.alternative | AGU hydrology days 2006 | |
dc.type | Text |
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