Feasibility of Modelling the Influences of Pit Recharge on Groundwater Levels and Quality in Alluvial Basins: Project Completion Report

Persistent Link:
http://hdl.handle.net/10150/305518
Title:
Feasibility of Modelling the Influences of Pit Recharge on Groundwater Levels and Quality in Alluvial Basins: Project Completion Report
Author:
Wilson, L. G.; Rasmussen, W. O.; O'Donnell, D. F.
Affiliation:
Water Resources Research Center; School of Renewable Natural Resources
Publisher:
University of Arizona (Tucson, AZ)
Issue Date:
Jul-1976
Description:
Project Completion Report, OWRT Project No. A-056-ARIZ / Agreement No. 14-31-0001-5003 / Project Dates: July 1974 - June 1975 / Acknowledgement: The work upon which this report is based was supported by funds provided by the State of Arizona and the United States Department of the Interior, Office of Water Research and Technology as authorized under the Water Resources Research Act of 1964.
URI:
http://hdl.handle.net/10150/305518
Abstract:
Specific objectives of the project included (1) examining the effect of pit recharge, using industrial blowdown effluent, on local ground-water levels and quality in the Tucson basin; and (2) evaluating the applicability of two digital models for modelling the hydraulic response of the aquifer to pumping and recharge. Fourteen pit trials ranging from 1 day to 185 days duration were implemented during a two year period. The total volume of effluent recharged was 157 ac-ft. Pit recharge on a limited basis did not appear to offset the general decline in local ground -water levels. However, recharge deteriorated the quality of ground water in shallow (150 ft) wells but not in a deeper (300 ft) well. A finite difference (FD) model and a finite element model (FEM) were used to simulate hydraulic conditions in a 2000. ft by 2000 ft aquifer region near the pit. An attempt was made to calibrate the models using water level data from a two-week aquifer test on a shallow well. Results were depicted using a three-dimensional graphics technique (SYMVU). Better results were obtained with the FD model than with the FEM, primarily because a finer mesh was used to discretize the region with the FD model than with the FEM. Results of the FEM were also biased by the rectangular configuration of the aquifer boundary. The finite element model was used to simulate aquifer response during a pit recharge test. Again, results were limited by the injudicious selection of elements and boundary configurations.
Language:
en_US
Keywords:
Artificial groundwater recharge -- Arizona.; Groundwater -- Arizona -- Mathematical models.

Full metadata record

DC FieldValue Language
dc.contributor.authorWilson, L. G.en_US
dc.contributor.authorRasmussen, W. O.en_US
dc.contributor.authorO'Donnell, D. F.en_US
dc.date.accessioned2013-11-18T20:30:50Z-
dc.date.available2013-11-18T20:30:50Z-
dc.date.issued1976-07-
dc.identifier.urihttp://hdl.handle.net/10150/305518-
dc.descriptionProject Completion Report, OWRT Project No. A-056-ARIZ / Agreement No. 14-31-0001-5003 / Project Dates: July 1974 - June 1975 / Acknowledgement: The work upon which this report is based was supported by funds provided by the State of Arizona and the United States Department of the Interior, Office of Water Research and Technology as authorized under the Water Resources Research Act of 1964.en_US
dc.description.abstractSpecific objectives of the project included (1) examining the effect of pit recharge, using industrial blowdown effluent, on local ground-water levels and quality in the Tucson basin; and (2) evaluating the applicability of two digital models for modelling the hydraulic response of the aquifer to pumping and recharge. Fourteen pit trials ranging from 1 day to 185 days duration were implemented during a two year period. The total volume of effluent recharged was 157 ac-ft. Pit recharge on a limited basis did not appear to offset the general decline in local ground -water levels. However, recharge deteriorated the quality of ground water in shallow (150 ft) wells but not in a deeper (300 ft) well. A finite difference (FD) model and a finite element model (FEM) were used to simulate hydraulic conditions in a 2000. ft by 2000 ft aquifer region near the pit. An attempt was made to calibrate the models using water level data from a two-week aquifer test on a shallow well. Results were depicted using a three-dimensional graphics technique (SYMVU). Better results were obtained with the FD model than with the FEM, primarily because a finer mesh was used to discretize the region with the FD model than with the FEM. Results of the FEM were also biased by the rectangular configuration of the aquifer boundary. The finite element model was used to simulate aquifer response during a pit recharge test. Again, results were limited by the injudicious selection of elements and boundary configurations.en_US
dc.language.isoen_USen_US
dc.publisherUniversity of Arizona (Tucson, AZ)en_US
dc.sourceWater Resources Research Center. The University of Arizona.en_US
dc.subjectArtificial groundwater recharge -- Arizona.en_US
dc.subjectGroundwater -- Arizona -- Mathematical models.en_US
dc.titleFeasibility of Modelling the Influences of Pit Recharge on Groundwater Levels and Quality in Alluvial Basins: Project Completion Reporten_US
dc.contributor.departmentWater Resources Research Centeren_US
dc.contributor.departmentSchool of Renewable Natural Resourcesen_US
dc.description.collectioninformationThis item is part of the Water Resources Research Center collection. It was digitized from a physical copy provided by the Water Resources Research Center at The University of Arizona. For more information about items in this collection, please contact the Center, (520) 621-9591 or see http://wrrc.arizona.edu.en_US
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