SelectedWorks - Thomas M. Isenhart

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Selected Works of Thomas M. Isenhart

Professor of Natural Resource Ecology and Management

Dr. Isenhart’s research interests include stream, riparian, and watershed management; design and establishment of conservation buffers to improve the environmental efficiency of agriculture, land use/hydrology and stream bed and bank erosion; watershed assessment; and land use and greenhouse gas emissions.

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About Thomas M. Isenhart

Dr. Isenhart’s research interests include stream, riparian, and watershed management; design and establishment of conservation buffers to improve the environmental efficiency of agriculture, land use/hydrology and stream bed and bank erosion; watershed assessment; and land use and greenhouse gas emissions.

Present	Professor, Iowa State University ‐ Department of Natural Resource Ecology and Management
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Hydrology and Natural Resources Management and Policy

Stream, riparian, and watershed management and Conservation buffers

NREM 130, Natural Resources and Agriculture
AEcl/Biol 312, Ecology
AEcl 418/518, Stream Ecology
NREM 390, Fire Ecology and Management

334 Science 2

2310 Pammel Dr

Ames, IA 50011

Phone: 515-294-8056

Fax: 515-294-2995

Email:

Peer-Reviewed Articles (31)

Improving the Effectiveness of Saturated Riparian Buffers for Removing Nitrate ...

Journal of Environmental Quality (2020)

Andrea R. McEachran, Loulou C. Dickey, Chris R. Rehmann, Tyler A. Groh, et al.

A saturated riparian buffer (SRB) is an edge‐of‐field conservation practice that reduces nitrate export from agricultural lands by redistributing tile ...

Riparian Land-Use, Stream Morphology and Streambank Erosion within Grazed Pastures ...

Sustainability (2020)

Mustafa Tufekcioglu, Richard C. Schultz, Thomas M. Isenhart, John L. Kovar, et al.

Factors influencing streambank erosion at the field/reach scale include both watershed and riparian land-uses, stream hydrology and channel morphology at ...

Automated measurement of eroding streambank volume from high-resolution aerial imagery ...

Geomorphology (2020)

Forrest Williams, Peter Moore, Thomas Isenhart and Mark Tomer

Excessive sediment is an important form of surface water impairment throughout the continental United States. Numerous studies have investigated the ...

Biomass Production with Conservation Practices for Two Iowa Watersheds

Journal of the American Water Resources Association (2020)

Miae Ha, May Wu, Mark D. Tomer, Philip W. Gassman, et al.

Hydrologic modeling was used to estimate potential changes in nutrients, suspended sediment, and streamflow in various biomass production scenarios with ...

Impact of hydraulic residence time on nitrate removal in pilot-scale ...

Journal of Environmental Management (2019)

E. A. Martin, Morgan P. Davis, Thomas B. Moorman, Thomas M. Isenhart, et al.

Nitrate (NO3−N) export from row crop agricultural systems with subsurface tile drainage continues to be a major water quality concern. ...

Changes in lateral floodplain connectivity accompanying stream channel evolution: Implications ...

Science of the Total Environment (2019)

William J. Beck, Peter L. Moore, Keith E. Schilling, Calvin F. Wolter, et al.

Floodplain storage commonly represents one of the largest sediment fluxes within sediment budgets. In watersheds responding to large scale disturbance, ...

Streambank Alluvial Unit Contributions to Suspended Sediment and Total Phosphorus ...

William Beck, Thomas Isenhart, Peter Moore, Keith Schilling, et al.

Streambank erosion may represent a significant source of sediment and phosphorus (P) to overall watershed loads; however, watershed-scale quantification of ...

Phosphorus source--sink relationships of stream sediments in the Rathbun Lake ...

Environmental Monitoring and Assessment (2016)

Najphak Hongthanat, John L. Kovar, Michael L. Thompson, James R. Russell, et al.

The surface waters of Rathbun Lake watershed in southern Iowa are impacted by agricultural sources of sediments and nutrients, including ...

Agricultural Conservation Planning Framework: 1. Developing Multipractice Watershed Planning Scenarios ...

Journal of Environmental Quality (2015)

Mark D. Tomer, S. A. Porter, K. M. B. Boomer, D. E. James, et al.

Spatial data on soils, land use, and topography, combined with knowledge of conservation effectiveness, can be used to identify alternatives ...

Reconnecting Tile Drainage to Riparian Buffer Hydrology for Enhanced Nitrate ...

Journal of Environmental Quality (2014)

Dan B. Jaynes and Thomas M. Isenhart

Riparian buffers are a proven practice for removing NO3 from overland flow and shallow groundwater. However, in landscapes with artificial ...

Streambank Erosion Rates and Loads within a Single Watershed: Bridging ...

Geomorphology (2014)

Jason A. Palmer, Keith E. Schilling, Thomas M. Isenhart, Richard C. Schultz, et al.

The importance of streambank erosion to watershed-scale sediment export is being increasingly recognized. However few studies have quantified bank erosion ...

Stream Bank Erosion as a Source of Sediment and Phosphorus ...

Journal of Soil and Water Conservation (2012)

Mustafa Tufekcioglu, Thomas M. Isenhart, Richard C. Schultz, Douglas A. Bear, et al.

Livestock grazing of riparian areas can have a major impact on stream banks and stream integrity if improperly managed. The ...

Streambank Erosion in Two Watersheds of the Central Claypan Region ...

Journal of Soil and Water Conservation (2012)

Cammy D. Willett, R. N. Lerch, Richard C. Schultz, Sara Alexandra Berges, et al.

This study was undertaken to assess the importance of streambank erosion to the total in-stream sediment of two agricultural watersheds ...

Stocking Rate and Riparian Vegetation Effects on Physical Characteristics of ...

Rangeland Ecology and Management (2012)

Douglas A. Bear, James R. Russell, Mustafa Tufekcioglu, Thomas M. Isenhart, et al.

Grazing at high stocking rates May Increase sediment and nutrient loading of streams pasture Through Transport in precipitation runoff and ...

Effects of Thinning on Transpiration by Riparian Buffer Trees in ...

Acta Horticulturae (2012)

V. Hernandez-Santana, Heidi Asbjornsen, Thomas J. Sauer, Thomas M. Isenhart, et al.

Upwind advective energy occurring in edge environments may increase tree water use. In humid agricultural landscapes, advection-enhanced transpiration in riparian ...

Enhanced Transpiration by Riparian Buffer Trees in Response to Advection ...

Forest Ecology and Management (2011)

V. Hernandez-Santana, Heidi Asbjornsen, Thomas J. Sauer, Thomas M. Isenhart, et al.

Riparian buffers are designed as management practices to increase infiltration and reduce surface runoff and transport of sediment and nonpoint ...

Source-Pathway Separation of Multiple Contaminants during a Rainfall-Runoff Event in ...

Journal of Environmental Quality (2010)

Mark D. Tomer, C. G. Wilson, Thomas B. Moorman, K. J. Cole, et al.

A watershed's water quality is influenced by contaminant-transport pathways unique to each landscape. Accurate information on contaminant-pathways could provide a ...

Methane Flux in Cropland and Adjacent Riparian Buff ers with ...

Journal of Environmental Quality (2009)

Dong-Gill Kim, Thomas M. Isenhart, Timothy B. Parkin, Richard C. Schultz, et al.

While water quality functions of conservation buffers established adjacent to cropped fields have been widely documented, the relative contribution of ...

Nitrous oxide emissions from riparian forest buffers, warm-season and cool-season ...

Biogeosciences Discussions (2009)

D. G. Kim, Thomas M. Isenhart, Timothy B. Parkin, Richard C. Schultz, et al.

Denitrification within riparian buffers may trade reduced nonpoint source pollution of surface waters for increased greenhouse gas emissions resulting from ...

A Tale of Three Watersheds: Nonpoint Source Pollution and Conservation ...

Keith E. Schilling, Mark D. Tomer, Philip W. Gassman, Catherine Kling, et al.

Many conservation practices and implementation programs exist to address nonpoint source (NPS) pollution losses from agricultural landscapes (Helmers et al., ...

Theme Overview: Agriculture and Water Quality in the Cornbelt: Overview ...

Matthew J. Helmers, Thomas M. Isenhart, Catherine L. Kling, William W. Simpkins, et al.

More than three decades have elapsed since the passage of the Federal Water Pollution Control Act with its stated goal ...

Relation of Riparian Buffer Strips to In-Stream Habitat, Macroinvertebrates and ...

Journal of the Iowa Academy of Science (2006)

Jeremy P. Duehr, Michael J. Siepker, Clay L. Pierce and Thomas M. Isenhart

Macroinvertebrate and fish habitat is often degraded as a result of agriculture. Riparian buffer strips are commonly used to counteract ...

Aggregate-Size Stability Distribution and Soil Stability

Soil Science Society of America Journal (2004)

C. O. Márquez, V. J. Garcia, Cynthia A. Cambardella, Richard C. Schultz, et al.

A new theoretical and experimental framework that permits an accurate determination of aggregate-size stability distribution is presented. The size-stability distribution ...

Optimizing the Placement of Riparian Practices in a Watershed using ...

Journal of Soil and Water Conservation (2003)

Mark D. Tomer, D. E. James and Thomas M. Isenhart

Riparian buffers and constructed wetlands are best management practices (BMPs) that can improve water quality. However, these practices are not ...

Quantifying Fine-Root Decomposition: An Alternative to Buried Litterbags

Mathew E. Dornbush, Thomas M. Isenhart and James W. Raich

Our understanding of fine-root decay processes is derived almost exclusively from litterbag studies. However, preparation of roots for litterbag studies ...