Assessment of Managed Aquifer Recharge at Sand Hollow Reservoir, Washington County, Utah, Updated to Conditions through 2018
Links
- Document: Report (5 MB pdf) , HTML , XML
- Tables:
- Appendix table 1.1 (20 KB csv) - Field water-quality parameters, dissolved organic carbon, tritium, chlorofluorocarbons, sulfur hexaflouride in groundwater and surface water from Sand Hollow, Utah.
- Appendix table 1.2 (25 KB csv) - Major and minor chemical constituents in groundwater and surface water from selected sites in Sand Hollow, Utah.
- Download citation as: RIS | Dublin Core
Abstract
Sand Hollow Reservoir in Washington County, Utah, was completed in March 2002 and is operated primarily for managed aquifer recharge by the Washington County Water Conservancy District. Sand Hollow Reservoir has remained nearly full since 2006 because of surface-water diversions of about 288,000 acre-feet (acre-ft) from 2002 through 2018. Groundwater levels in monitoring wells near the reservoir rose through 2006 and have fluctuated since then because of variations in reservoir stage and nearby pumping from production wells. Between 2004 and 2018, about 46,000 acre-ft of groundwater was withdrawn by these wells for municipal supply. In addition, about 45,000 acre-ft of shallow seepage was captured by French drains adjacent to the North and West Dams and used for municipal supply, irrigation, or returned to the reservoir. From 2002 through 2018, about 159,000 acre-ft of water seeped beneath the reservoir to recharge the underlying Navajo Sandstone aquifer, which includes about 18,500 acre-ft of recharge in the 2017–18 period since the last report.
Water quality continued to be monitored at various wells in Sand Hollow during 2017–18 to evaluate the timing and location of reservoir recharge as it moved through the aquifer. Changing geochemical conditions at monitoring well water district (WD) 12 indicated rising groundwater levels and mobilization of vadose-zone salts, which could be a precursor to the arrival of reservoir recharge. Changes to geochemical conditions and environmental tracers at monitoring well WD 22 indicated the arrival of reservoir recharge.
Suggested Citation
Marston, T.M., 2024, Assessment of managed aquifer recharge at Sand Hollow Reservoir, Washington County, Utah, updated to conditions through 2018: U.S. Geological Survey Open-File Report 2022–1089, 20 p., https://doi.org/10.3133/ofr20221089.
ISSN: 2331-1258 (online)
Study Area
Table of Contents
- Abstract
- Introduction
- Assessment of Managed Aquifer Recharge from Sand Hollow Reservoir
- Groundwater and Surface-Water Quality in Sand Hollow
- Summary
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Assessment of managed aquifer recharge at Sand Hollow Reservoir, Washington County, Utah, updated to conditions through 2018 |
| Series title | Open-File Report |
| Series number | 2022-1089 |
| DOI | 10.3133/ofr20221089 |
| Year Published | 2024 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Utah Water Science Center |
| Description | Report: v, 20 p.; 2 Tables |
| Country | United States |
| State | Utah |
| County | Washington County |
| Other Geospatial | Sand Hollow Reservoir |
| Online Only (Y/N) | Y |
| Additional Online Files (Y/N) | Y |
| Google Analytic Metrics | Metrics page |