The IGS Sediment Laboratory is a fully-functioning Quaternary materials lab managed by IGS Soil Scientist Matthew Streeter. The lab opened in 2014 and is housed at the IGS Oakdale facility.
The lab provides a broad spectrum of analyses, including soil particle size analysis (pipette and x-ray absorption); sand fractionation; total carbon, nitrogen, sulfur, and hydrogen (chromatography); and soil organic matter (loss on ignition).
The lab also maintains a large inventory of field monitoring equipment, including monitoring well instrumentation, water-quality meters, and the IGS drill rig.
Education
While the sediment lab primarily runs samples and manages equipment deployments for IGS projects, it also provides valuable data for several IGS collaborators. Over the past five years, the IGS sediment lab has provided multiple opportunities for students to gain real-world experience in soil collection, analysis, and interpretation techniques.
Quick Links
Projects
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More to Come — Excavated basins or existing gravel pits can be flooded to provide additional groundwater storage. Water in these basins infiltrates into the aquifer, allowing wellfields to maintain water production during a drought for multiple years, and reducing nitrate concentrations in the groundwater recharge.
Placeholder — Floodplain ponds can improve water quality in an aquifer and provide a gradual source of groundwater recharge.
Placeholder — Land use and land cover changes near a wellfield can affect water quality. Cover crops, riparian buffers, and other conservation practices can reduce nutrient and sediment loads in surface water, which feeds alluvial aquifers.
The IGS team can put the Sediment Lab to work for clients in research, business, agriculture, and industry.
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IGS soil scientist Matthew Streeter works closely with hydrologists to monitor soil and water relationships specifically related to soil sustainability and water quality. He is an expert in several aspects of soil health including soil erosion, soil carbon and nitrogen relationships, as well as nutrient processing capacities of soils in different environments across Iowa.
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Placeholder: Electrical resistivity and seismic refraction can characterize alluvial, bedrock, and buried sand and gravel aquifers. Geophysics results, integrated with drilling record, geologic logs, and other site information can be used to develop a 3D characterization of the subsurface.
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IGS pump tests provide information useful for water utilities and design engineers. Information can include pump size, future pumping rates and cycles, optimization of well spacing, potential long-term well interference and drawdowns, and critical input data for future groundwater model development.
Contact Us
Soil Scientist
Soil Processes
MS, Iowa State University
340C Trowbridge Hall
319-335-1593
matthew-streeter@uiowa.edu
