In Situ Denitrification in Saturated Riparian Buffers.

  title={In Situ Denitrification in Saturated Riparian Buffers.},
  author={Tyler A Groh and Morgan P. Davis and Thomas M. Isenhart and Dan B. Jaynes and Timothy B. Parkin},
  journal={Journal of environmental quality},
  volume={48 2},
Excess NO leaching from the agricultural Midwest via tile drainage water has contributed to both local drinking water and national Gulf of Mexico benthic hypoxia concerns. Both in-field and edge-of-field practices have been designed to help mitigate NO flux to surface waters. Edge-of-field practices focus on maximizing microbial denitrification, the conversion of NO to N gas. This study assessed denitrification rates from two saturated riparian buffers (SRBs) for 2 yr and a third SRB for 1 yr… 

Nitrate removal in both traditional and saturated riparian buffers

Nitrate leaching from Midwestern agricultural fields is an important environmental issue, as this nitrate can enter streams and cause local drinking water issues as well as increase the size of the

Performance of Saturated Riparian Buffers in Iowa, USA.

Results showed that all the SRBs were effective in removing NO from the tile outlet, with the average annual NO load removal ranging from 13 to 179 kg N for drainage areas ranging from 3.4 to 40.5 ha.

Improving the effectiveness of saturated riparian buffers for removing nitrate from subsurface drainage.

An approach to improve the design of SRBs is proposed by analyzing a tradeoff in choosing the SRB width, and it is applied to six sites with existing SRBs in central Iowa.

Improving the design of saturated riparian buffers for removing nitrate from subsurface drainage

In the U.S. Midwest, agricultural subsurface drainage, or tile, is commonly used to improve crop production; however, because nitrate is easily leached, tile drainage typically has high nitrate

Quantifying the effectiveness of a saturated buffer to reduce tile NO3-N concentrations in eastern Iowa

This study provided more assurance to new adopters that this practice can be installed in many areas throughout the Midwestern Cornbelt region by reducing NO3-N concentrations in tile drainage water from input concentrations of approximately 15mg/l to levels < 1.5 mg/l at the streamside well locations.

Nitrous Oxide Emissions from Saturated Riparian Buffers: Are We Trading a Water Quality Problem for an Air Quality Problem?

Overall, total NO emissions from SRBs were similar to those from traditional buffers and less than those from fertilized corn-soybean agriculture.

Recycling of Nitrate and Organic Matter by Plants in the Vadose Zone of a Saturated Riparian Buffer

In agricultural land-use regions, excess nitrate in the soil contributes to eutrophication and pollution of both surface and subsurface waters. This study examines the role of plant uptake within the

Evaluation of the slope stability of streambanks at saturated riparian buffer sites

Saturated riparian buffers (SRBs) reduce nitrate export from agricultural tile drainage by infusing drainage water into carbon-rich riparian soils where denitrification and plant uptake can occur.

Groundwater nitrate removal in riparian buffer zones: a review of research progress in the past 20 years

  • A. Hill
  • Environmental Science
  • 2019
This review evaluates research in the past 20 years focusing on groundwater nitrate removal in the riparian zones of agricultural watersheds. Studies have reported a large range in the magnitude of



Performance of Saturated Riparian Buffers in Iowa, USA.

Results showed that all the SRBs were effective in removing NO from the tile outlet, with the average annual NO load removal ranging from 13 to 179 kg N for drainage areas ranging from 3.4 to 40.5 ha.

Shallow groundwater nitrogen and denitrification in a newly afforested, subirrigated riparian buffer

Summary 1. The EU ‘Nitrates Directive’ (Directive 91 ⁄ 676 ⁄ EEC) and the WFD (Water Framework Directive 2000 ⁄ 60 ⁄ EEC) introduced a series of measures designed to reduce and prevent water

Linkages between organic matter mineralization and denitrification in eight riparian wetlands

Denitrification (N2 production) and oxygen consumption rates were measured at ambient field nitrate concentrations during summer in sediments from eight wetlands (mixed hardwood swamps, cedar swamps,

Nitrous oxide emission and denitrification in chronically nitrate-loaded riparian buffer zones.

N transformation by nitrate-loaded buffer zones results in a significant increase of greenhouse gas emission, indicating that Intergovernmental Panel on Climate Change methodologies for quantifying indirect N2O emissions have to distinguish between agricultural uplands and riparian buffer zones in landscapes receiving large N inputs.

Denitrification in a grassed and a wooded, valley and ridge, riparian Ecotone

Dentrification is one of the major mechanisms responsible for changes in NO 3 - -N concentrations in shallow groundwater as subsurface flow passes from agricultural fields to the stream. In this

Nitrogen removal and greenhouse gas emissions from constructed wetlands receiving tile drainage water.

Loss of nitrate from agricultural lands to surface waters is an important issue, especially in areas that are extensively tile drained. To reduce these losses, a wide range of in-field and

Nitrate and dissolved nitrous oxide in groundwater within cropped fields and riparian buffers

Abstract. Transport and fate of dissolved nitrous oxide (N2O) in groundwater and its significance to nitrogen dynamics within agro-ecosystems are poorly known in spite of significant potential of N2O

Denitrification Distributions in Four Valley and Ridge Riparian Ecosystems

While patternsof nitrate-N, moisture, and organic carbon content differ among the sites, their combined effects on denitrification support the observed, consistentdenitrification rate pattern.