Title: Black Hawk Lake watershed NWQI monitoring
Location: Nearest centrally located town is Carnavon, IA
Time Period: 2014-2019 (Phase I), 2020-2024 (Phase II)
Research Team: Michelle L. Soupir, Matthew Helmers, Amy Kaleita, Leigh Ann Long, Ji Yeow Law, Allen Bonini, Jason Palmer, T.J. Lynn, and Ethan Thies
Project Description: Water quality monitoring (nitrogen, phosphorus, sediment, and bacteria) is conducted in several smaller subwatersheds of the larger Black Hawk Lake watershed from March-November. The monitoring data are being used to determine if pollutant load reduction strategies, including grass waterways, terraces, cover crops, CRP – native grass plantings, CREP wetlands, reduced tillage, and nutrient management plans, are effective in different subwatersheds with various levels of BMP implementation, ranging in areal coverage from 20% to 88%. In the monitored subwatersheds, both surface outlets and tile outlets are monitored during baseflow and storm events to capture the total outflows from these subwatersheds.
Publications: Brendel, Conrad. 2017. Evaluation of subsurface drainage on phosphorus losses and application of the SoilIceDB model in the Black Hawk Lake Watershed, Iowa. M.S. thesis, Iowa State University.
Brendel, Conrad E., Michelle L. Soupir, Leigh Ann M. Long, Matthew J. Helmers, Charles D. Ikenberry, and Amy L. Kaleita. 2018. Catchment-scale phosphorus export through surface and drainage pathways. Journal of Environmental Quality 48 (1):117-126. doi:10.2134/jeq2018.07.0265.
Law, Ji Yeow, Conrad Brendel, Leigh Ann Long, Matthew Helmers, Amy Kaleita, Michelle Soupir (submitted). Impact of land use changes and conservation practices on phosphorus and sediment export at the catchment scale. Journal of Environmental Quality.
Neher, Timothy P. 2019. Catchment-scale export of antibiotic resistance genes and bacteria from an agricultural watershed in central Iowa. M.S. thesis, Iowa State University.
Neher, Timothy P., Lanying Ma, Thomas B. Moorman, Adina C. Howe, and Michelle L. Soupir. 2020. Catchment-scale export of antibiotic resistance genes and bacteria from an agricultural watershed in central Iowa. PLoS ONE 15(1):e0227136. https://doi.org/10.1371/journal.pone.0227136.
Van der Woude, Katherine. 2018. An analysis of BMPs and their combined effectiveness at reducing nitrate-nitrogen export to the Black Hawk Lake Watershed, Iowa. M.S. thesis, Iowa State University.
Funders: National Water Quality Initiative - US EPA Region 7, Section 319; Iowa Department of Natural Resources; USDA
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