scholarly journals Effects of land management on inundation of prairie pothole wetlands in the Des Moines Lobe using AnnAGNPS

2019 ◽  
Vol 213 ◽  
pp. 947-956 ◽  
Author(s):  
P. Upadhyay ◽  
L.O.S. Pruski ◽  
A.L. Kaleita ◽  
M.L. Soupir
Keyword(s):  
Land Management ◽  
Prairie Pothole ◽  
Des Moines Lobe ◽  
Des Moines ◽  
Prairie Pothole Wetlands

scholarly journals Inundation Patterns of Farmed Pothole Depressions with Varying Subsurface Drainage

2019 ◽  
Vol 62 (6) ◽  
pp. 1579-1590
Author(s):  
Alexander Martin ◽  
Amy L. Kaleita ◽  
Michelle L. Soupir
Keyword(s):  
Surface Water ◽  
Agricultural Land ◽  
Subsurface Drainage ◽  
Soil Conditions ◽  
Prairie Pothole ◽  
Des Moines Lobe ◽  
Row Crops ◽  
Surface Water Hydrology ◽  
South Central ◽  
Des Moines

HighlightsFarmed pothole depressions in the Des Moines Lobe were observed to fill due to runoff and shallow subsurface flow.Six of the eight observed potholes flooded for five or more days some time during the two years of observation.Subsurface drainage and surface inlets reduced but did not prevent yield-limiting flooding in the observed potholes. Abstract. The prairie pothole region (PPR) ranges from central Iowa to the northwest into Montana and south central Canada, totaling around 700,000 km2. This area contains millions of potholes, or enclosed topographical depressions, which often inundate with rainfall. Many are located in areas that have been converted to arable agricultural land through installation of artificial drainage. However, even with drainage, potholes will pond or have saturated soil conditions during and after significant rain events. The portion of the PPR that extends into Iowa is known as the Des Moines Lobe. In this two-year study, surface water depth data were collected hourly from eight prairie potholes in the Des Moines Lobe in central Iowa to determine the surface water hydrology. These potholes included surface and subsurface drained row crops and undrained retired land, allowing for drainage comparisons. Inundation lasted five or more days at least once at six of the eight potholes, including four potholes with surface inlets and subsurface drainage, which resulted in four of fourteen growing seasons not producing a yield in part of the pothole. Water balances of four different drainage intensities showed increased infiltration due to subsurface drainage and up to 78% of outflow due to surface inlet drainage. Overall, drainage decreased the number of average inundation days, but heavy precipitation events still caused lengthy inundation periods that resulted in crop loss. Keywords: Farmed wetlands, Prairie pothole, Tile drainage, Water balance.

scholarly journals Seasonal and Intra-Event Nutrient Levels in Farmed Prairie Potholes of the Des Moines Lobe

2019 ◽  
Vol 62 (6) ◽  
pp. 1607-1617
Author(s):  
Alexander R. Martin ◽  
Michelle L. Soupir ◽  
Amy L. Kaleita
Keyword(s):  
Surface Water ◽  
Suspended Solids ◽  
Total Suspended Solids ◽  
Prairie Pothole ◽  
Des Moines Lobe ◽  
South Central ◽  
Des Moines ◽  
Field Management ◽  
Concentration Changes ◽  
Total P

HighlightsNitrogen, total phosphorus, and total suspended solids concentrations were higher in early season inundation.Nitrate concentrations in farmed potholes decreased with multiday ponding.Farmed potholes act as hotspots, contributing P to drainage through surface intakes.Abstract. The prairie pothole region ranges from central Iowa to the northwest into Montana and south-central Canada, totaling around 700,000 km2. This area contains millions of potholes, or enclosed topographical depressions, which often inundate with rainfall. Many are located in areas that have been converted to agricultural land through installation of artificial drainage. However, even with drainage, potholes pond or remain saturated during and after significant rain events. In this two-year study, surface water depth was collected hourly (typically from after planting through harvest) from eight farmed potholes (drained and under corn-soybean rotation) on the Des Moines Lobe in central Iowa. Nutrient data were collected daily and tested for nitrogen (N) and phosphorus (P) when inundation depth exceeded 10 cm. The data were analyzed in two ways. First, seasonal differences were investigated using samples from the first day of each inundation event. Surface water concentrations were higher in the early growing season than late season for total N (TN), NO3-N, NH3-N, total P (TP), and total suspended solids (TSS). Secondly, average event concentration changes were determined. Nitrate reductions occurred in 85% of multiday events, but these reductions were offset by increases in P. Total P and dissolved reactive P (DRP) had significant increases that averaged 0.51 and 0.46 mg L-1 per event, respectively, with event lengths of 2 to 19 days. This study demonstrates that inundated farmed potholes reduce NO3-N but serve as in-field hotspots, contributing elevated TP and DRP to drainage waters. When a surface intake directly connects inundated farmed potholes to drainage, new strategies, such as field management or engineered technologies, are needed to mitigate P export. This study is useful in informing policy regarding field management and conservation of farmed potholes. Keywords: Farmed wetland, Nitrogen, Nutrients, Phosphorus, Prairie pothole.

MORPHOLOGY OF DRAINED UPLAND DEPRESSIONS ON THE DES MOINES LOBE OF IOWA

2018 ◽  
Author(s):  
Samuel M. McDeid ◽  
◽  
David I.S. Green ◽  
William Crumpton
Keyword(s):  
Des Moines Lobe ◽  
Des Moines

FIELD CALIBRATION OF THE THETA PROBE FOR DES MOINES LOBE SOILS

2005 ◽  
Vol 21 (5) ◽  
pp. 865-870 ◽  
Author(s):  
A. L. Kaleita ◽  
J. L. Heitman ◽  
S. D. Logsdon
Keyword(s):  
Des Moines Lobe ◽  
Field Calibration ◽  
Des Moines

scholarly journals Modeling the Supporting Ecosystem Services of Depressional Wetlands in Agricultural Landscapes

Wetlands ◽  
2020 ◽  
Vol 40 (5) ◽  
pp. 1061-1069
Author(s):  
David M. Mushet ◽  
Cali L. Roth
Keyword(s):  
Ecosystem Services ◽  
Crop Production ◽  
System Modeling ◽  
Integrated Approach ◽  
Agricultural Landscapes ◽  
Floral Resources ◽  
Depressional Wetlands ◽  
Native Plant ◽  
Des Moines Lobe ◽  
Des Moines

Abstract We explored how a geographic information system modeling approach could be used to quantify supporting ecosystem services related to the type, abundance, and distribution of landscape components. Specifically, we use the Integrated Valuation of Ecosystem Services and Tradeoffs model to quantify habitats that support amphibians and birds, floral resources that support pollinators, native-plant communities that support regional biodiversity, and above- and below-ground carbon stores in the Des Moines Lobe ecoregion of the U.S. We quantified services under two scenarios, one that represented the 2012 Des Moines Lobe landscape, and one that simulated the conversion to crop production of wetlands and surrounding uplands conserved under the USDA Agricultural Conservation Easement Program (ACEP). While ACEP easements only covered 0.35% of the ecoregion, preserved wetlands and grasslands provided for 19,020 ha of amphibian habitat, 21,462 ha of grassland-bird habitat, 18,798 ha of high-quality native wetland plants, and 27,882 ha of floral resources for pollinators. Additionally, ACEP protected lands stored 257,722 t of carbon that, if released, would result in costs in excess of 45-million USD. An integrated approach using results from a GIS-based model in combination with process-based model quantifications will facilitate more informed decisions related to ecosystem service tradeoffs.

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