Sediment and nutrient trapping efficiency of a constructed wetland near Delavan Lake, Wisconsin, 1993-1995

Elder, John F.; Goddard, G.L.

doi:10.3133/fs23296

Cited by 6 publications

(4 citation statements)

References 6 publications

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“…Jackson Creek wetland (a 39 ha wetland near Lake Delavan, WI) contains several sewage treatment ponds. The average daily load of dissolved NO 2 +NO 3 ‐N from May to June was approximately 340 kg during a high precipitation year, and <45 kg for a dry year (Elder & Goddard, 1996). The yearly load of NO 2 +NO 3 ‐N in the dry year was just over 19 000 kg.…”

Section: Discussionmentioning

confidence: 99%

Do dams and levees impact nitrogen cycling? Simulating the effects of flood alterations on floodplain denitrification

Gergel

Carpenter

Stanley

2005

Global Change Biology

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A fundamental challenge in understanding the global nitrogen cycle is the quantification of denitrification on large heterogeneous landscapes. Because floodplains are important sites for denitrification and nitrogen retention, we developed a generalized floodplain biogeochemical model to determine whether dams and flood-control levees affect floodplain denitrification by altering floodplain inundation. We combined a statistical model of floodplain topography with a model of hydrology and nitrogen biogeochemistry to simulate floods of different magnitude. The model predicted substantial decreases in NO 3 -N processing on floodplains whose overbank floods have been altered by levees and upstream dams. Our simulations suggest that dams may reduce nitrate processing more than setback levees. Levees increased areal floodplain denitrification rates, but this effect was offset by a reduction in the area inundated. Scenarios that involved a levee also resulted in more variability in N processing among replicate floodplains.Nitrate loss occurred rapidly and completely in our model floodplains. As a consequence, total flood volume and the initial mass of nitrate reaching a floodplain may provide reasonable estimates of total N processing on floodplains during floods. This finding suggests that quantifying the impact of dams and levees on floodplain denitrification may be possible using recent advances in remote sensing of floodplain topography and flood stage. Furthermore, when considering flooding over the long-term, the cumulative N processed by frequent smaller floods was estimated to be quite large relative to that processed by larger, less frequent floods. Our results suggest that floodplain denitrification may be greatly influenced by the pervasive anthropogenic flood-control measures that currently exist on most majors river floodplains throughout the world, and may have the potential to be impacted by future changes in flood probabilities that will likely occur as a result of climate shifts.

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Section: Discussionmentioning

confidence: 99%

Do dams and levees impact nitrogen cycling? Simulating the effects of flood alterations on floodplain denitrification

Gergel

Carpenter

Stanley

2005

Global Change Biology

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“…Braskerud (2001) found for constructed wetlands in southeast Norway, sedimentation rates of 14-121 kg m À2 y À1 . Elder and Goddard (1996) obtained a STE of 80% at the Jackson Creek wetland in Wisconsin, while the Imperial Valley wetland in California had a STE of 97% (Kadlec et al, 2010). Other constructed wetlands revealed STEs of 71-90% in southern Brazil (Sezerino et al, 2012), and 72-88% in North Carolina (Line et al, 2008).…”

Section: Sediment Trapping -Natural Sediment Sinksmentioning

confidence: 99%

Reducing Sediment Connectivity Through man‐Made and Natural Sediment Sinks in the Minizr Catchment, Northwest Ethiopia

et al. 2016

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Man‐made and natural sediment sinks provide a practical means for reducing downstream reservoir sedimentation by decreasing soil erosion and enhancing the rate of sedimentation within a catchment. The Minizr catchment (20 km2) in the northwest Ethiopian highlands contains numerous man‐made soil and water conservation (SWC) structures such as soil bunds (Erken), fanya juu ridge (Cab) and micro‐trenches and natural sediment sinks such as wetlands, floodplains and grassed waterways. These sediment sinks reduce downstream sedimentation into the Koga reservoir, located at the catchment outlet, however, a large quantity of sediment is still reaching the reservoir. This study evaluates the function and effectiveness of both man‐made SWC structures and natural sediment sinks in reducing sediment export from the Minizr catchment. SWC structures and natural sediment sinks were digitized using Google Earth Imagery. Sediment pins and vertical sampling through the deposit were used to quantify the amount of deposited sediment. In addition, inflow and outflow of suspended sediment data were used to calculate the sediment‐trapping efficacies (STE) of man‐made SWC structures (soil bunds and fanya juu ridges) and natural sediment sinks. Results reveal that 144 km soil bunds and fanya juu ridges trapped 7,920 Mg y−1 (55 kg m−1 y−1) and micro‐trenches trapped 13·26 Mg y−1, each micro‐trench on average trapped 23 kg y−1. The 17 ha floodplain located in the centre of the catchment trapped 9,970 Mg y−1 (59 kg m−2 y−1), while a wetland with a surface area of 24 ha, located near the outlet of the catchment, trapped 8,715 Mg y−1 (36 kg m−2 y−1). The STEs of soil bunds and fanya juu ridges, wetlands and floodplains were 54%, 85% and 77%, respectively. Substantial differences were observed between the STE of grassed and un‐grassed waterways at 75% and 21%, respectively. Existing man‐made and natural sediment sinks played an important role in trapping sediment, with 38% (26,600 Mg y−1) of transported sediment being trapped, while 62% (43,000 Mg y−1) is exported from the catchment and thus enters the Koga reservoir. Therefore, additional catchment treatment measures are required as an integrated catchment scale sediment trapping approach to help reduce sediment loads entering Koga reservoir. Moreover, to maximize the effectiveness of sediment trapping measures, avoid structural failure and ensure their sustainability, regular maintenance is needed. Copyright © 2016 John Wiley & Sons, Ltd.

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“…. Elder and Goddard (1996) obtained a STE of 80% at the Jackson Creek wetland in Wisconsin, while the Imperial Valley wetland in California had a STE of 97% (Kadlec et al, 2010). Other constructed wetlands revealed STEs of 71-90% in southern Brazil (Sezerino et al, 2012), and 72-88% in North Carolina (Line et al, 2008).…”

Section: Sediment Trapping By Man-made Swc Structuresmentioning

confidence: 99%

“…This result agrees well with the literature. For example, 14-121 kg m -2 y -1 (Braskerud, 2001) and STEs of 80% (Elder & Goddard, 1996), 71-90% (Sezerino et al, 2012) and 72-88% (Line et al, 2008). The 17 ha floodplain trapped 9,970 t of sediment annually with a STE of 77% and an average sedimentation rate of 59 kg m -2 y -1…”

Section: Are the Locally Dominant Indigenous Grass Species In Northwementioning

confidence: 99%

Sustaining reservoir use through sediment trapping in NW Ethiopia

Getahun¹

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Sediment and nutrient trapping efficiency of a constructed wetland near Delavan Lake, Wisconsin, 1993-1995

Cited by 6 publications

References 6 publications

Do dams and levees impact nitrogen cycling? Simulating the effects of flood alterations on floodplain denitrification

Do dams and levees impact nitrogen cycling? Simulating the effects of flood alterations on floodplain denitrification

Reducing Sediment Connectivity Through man‐Made and Natural Sediment Sinks in the Minizr Catchment, Northwest Ethiopia

Sustaining reservoir use through sediment trapping in NW Ethiopia

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