A hydrogeologic investigation of Ada Hayden Lake in Ames, Iowa
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The Department of Geological and Atmospheric Sciences offers majors in three areas: Geology (traditional, environmental, or hydrogeology, for work as a surveyor or in mineral exploration), Meteorology (studies in global atmosphere, weather technology, and modeling for work as a meteorologist), and Earth Sciences (interdisciplinary mixture of geology, meteorology, and other natural sciences, with option of teacher-licensure).
History
The Department of Geology and Mining was founded in 1898. In 1902 its name changed to the Department of Geology. In 1965 its name changed to the Department of Earth Science. In 1977 its name changed to the Department of Earth Sciences. In 1989 its name changed to the Department of Geological and Atmospheric Sciences.
Dates of Existence
1898-present
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- Department of Geology and Mining (1898-1902)
- Department of Geology (1902-1965)
- Department of Earth Science (1965-1977)
- Department of Earth Sciences (1977-1989)
Related Units
- College of Liberal Arts and Sciences (parent college)
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Abstract
Ada Hayden Lake, a 49.6 ha, gravel-pit lake containing 5.2 million m 3 of water, comprises the emergency water supply for Ames, Iowa. This study characterized and quantified groundwater/lake interaction for the assessment of water supply potential. Hydraulic head, delta18O, delta 2H, and 3H data collected from 23 piezometers show that Ada Hayden Lake is a flow-through lake. Geochemistry is characterized by high P concentrations (SRP=93.6 mug/L), denitrification, and methanogenesis. A 3-D, finite-difference groundwater flow model shows that groundwater contributes 85 percent of the lake's water budget and approximately 42 percent of the soluble reactive P load. Model-simulated pumping of 106 gal/d from the lake during drought induces flow from the South Skunk River and lowers lake stage 3.6 m after 30 days. Pumping 1000 gpm in the aquifer for a year produces a drawdown of 3.75 m, induces flow from the lake, and lowers lake stage about 0.09 m.