Characterization of prairie pothole inundation using AnnAGNPS under varying management and drainage scenarios
Farmed prairie potholes are small, isolated depressions frequently classified as semi-permanent wetlands that make up a significant portion of land area in the Des Moines Lobe (DML) of the larger Prairie Pothole Region (PPR). Historically, these depressions have been subjected to significant drainag...
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ftiowastateuniv:oai:lib.dr.iastate.edu:abe_eng_pubs-2502 2023-05-15T16:02:07+02:00 Characterization of prairie pothole inundation using AnnAGNPS under varying management and drainage scenarios Nahkala, Brady A. Kaleita, Amy Soupir, Michelle L. 2021-09-01T07:00:00Z application/pdf https://lib.dr.iastate.edu/abe_eng_pubs/1217 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=2502&context=abe_eng_pubs en eng Iowa State University Digital Repository https://lib.dr.iastate.edu/abe_eng_pubs/1217 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=2502&context=abe_eng_pubs http://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND Agricultural and Biosystems Engineering Publications Prairie Potholes AnnAGNPS Precision agriculture Targeted conservation Farmed wetlands Agriculture Bioresource and Agricultural Engineering text 2021 ftiowastateuniv 2021-06-12T22:43:16Z Farmed prairie potholes are small, isolated depressions frequently classified as semi-permanent wetlands that make up a significant portion of land area in the Des Moines Lobe (DML) of the larger Prairie Pothole Region (PPR). Historically, these depressions have been subjected to significant drainage to improve their agricultural capacity. However, many assessments of the economic return of continuing to farm these depressions suggest that continued attempts to produce conventional row crops is not profitable and has other ecological consequences beyond crop drownout. This study expands the existing discussion of land use and drainage alternatives in a watershed modeling context. This study utilized the Annualized Agricultural Non-Point Source (AnnAGNPS) model to individually simulate the long-term hydrology of 6 prairie potholes using a matrix of land use and drainage modifications. Results suggest the presence of artificial drainage is the dominant factor in prairie pothole hydrology, while retirement and no-till practices can provide moderate reductions in flood inundation. Conservation tillage induces minimal change on flood metrics. Results show that average annual maximum inundated surface area is reduced by at most 50% across all simulations and the median annual days flooded could be reduced by 25 days, though this is less consistent when isolating high-precipitation years. Regardless of drainage status, in all scenarios there are, on average, more than two inundations events per year lasting 2–4 days. Longer events occur approximately once per year on average. Area inundation frequency curves suggest up to a 20% reduction in maximum pothole area inundated annually can be achieved at the 2-year return frequency. The availability of this data helps characterize the hydrology of farmed potholes more generally over a wide range of conditions, providing a reference for the prioritization of potholes for conservation or alternative management. Text DML Digital Repository @ Iowa State University |
institution |
Open Polar |
collection |
Digital Repository @ Iowa State University |
op_collection_id |
ftiowastateuniv |
language |
English |
topic |
Prairie Potholes AnnAGNPS Precision agriculture Targeted conservation Farmed wetlands Agriculture Bioresource and Agricultural Engineering |
spellingShingle |
Prairie Potholes AnnAGNPS Precision agriculture Targeted conservation Farmed wetlands Agriculture Bioresource and Agricultural Engineering Nahkala, Brady A. Kaleita, Amy Soupir, Michelle L. Characterization of prairie pothole inundation using AnnAGNPS under varying management and drainage scenarios |
topic_facet |
Prairie Potholes AnnAGNPS Precision agriculture Targeted conservation Farmed wetlands Agriculture Bioresource and Agricultural Engineering |
description |
Farmed prairie potholes are small, isolated depressions frequently classified as semi-permanent wetlands that make up a significant portion of land area in the Des Moines Lobe (DML) of the larger Prairie Pothole Region (PPR). Historically, these depressions have been subjected to significant drainage to improve their agricultural capacity. However, many assessments of the economic return of continuing to farm these depressions suggest that continued attempts to produce conventional row crops is not profitable and has other ecological consequences beyond crop drownout. This study expands the existing discussion of land use and drainage alternatives in a watershed modeling context. This study utilized the Annualized Agricultural Non-Point Source (AnnAGNPS) model to individually simulate the long-term hydrology of 6 prairie potholes using a matrix of land use and drainage modifications. Results suggest the presence of artificial drainage is the dominant factor in prairie pothole hydrology, while retirement and no-till practices can provide moderate reductions in flood inundation. Conservation tillage induces minimal change on flood metrics. Results show that average annual maximum inundated surface area is reduced by at most 50% across all simulations and the median annual days flooded could be reduced by 25 days, though this is less consistent when isolating high-precipitation years. Regardless of drainage status, in all scenarios there are, on average, more than two inundations events per year lasting 2–4 days. Longer events occur approximately once per year on average. Area inundation frequency curves suggest up to a 20% reduction in maximum pothole area inundated annually can be achieved at the 2-year return frequency. The availability of this data helps characterize the hydrology of farmed potholes more generally over a wide range of conditions, providing a reference for the prioritization of potholes for conservation or alternative management. |
format |
Text |
author |
Nahkala, Brady A. Kaleita, Amy Soupir, Michelle L. |
author_facet |
Nahkala, Brady A. Kaleita, Amy Soupir, Michelle L. |
author_sort |
Nahkala, Brady A. |
title |
Characterization of prairie pothole inundation using AnnAGNPS under varying management and drainage scenarios |
title_short |
Characterization of prairie pothole inundation using AnnAGNPS under varying management and drainage scenarios |
title_full |
Characterization of prairie pothole inundation using AnnAGNPS under varying management and drainage scenarios |
title_fullStr |
Characterization of prairie pothole inundation using AnnAGNPS under varying management and drainage scenarios |
title_full_unstemmed |
Characterization of prairie pothole inundation using AnnAGNPS under varying management and drainage scenarios |
title_sort |
characterization of prairie pothole inundation using annagnps under varying management and drainage scenarios |
publisher |
Iowa State University Digital Repository |
publishDate |
2021 |
url |
https://lib.dr.iastate.edu/abe_eng_pubs/1217 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=2502&context=abe_eng_pubs |
genre |
DML |
genre_facet |
DML |
op_source |
Agricultural and Biosystems Engineering Publications |
op_relation |
https://lib.dr.iastate.edu/abe_eng_pubs/1217 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=2502&context=abe_eng_pubs |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766397721612124160 |