Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

A Review of Vegetated Buffer Efficacy

17.02.2010
Scientists analyze the literature to establish relationships between pollutant removal efficacy and key buffer design features.

Agricultural nonpoint source pollution has been listed as one of the leading sources of pollution in rivers and water bodies throughout the world. Environmental regulators and scientists are making concerted efforts to reduce these pollutions using mitigation tools called best management practices (BMPs). As promising and effective BMPs, vegetated buffers are gradually gaining in popularity. However, lack of quantification on their mitigation efficacies limits their implementation in agricultural fields to reduce nonpoint source pollutions.

Scientists at the University of California, Davis, reviewed more than 300 papers, analyzed the data from these studies, and developed statistical models describing the mitigation efficacies of vegetated buffers. Specifically, they established the relationships between buffer pollutant removal efficacy and buffer width, buffer slope, soil, and vegetation types. Results from the study were published in the January-February 2010 issue of Journal of Environmental Quality. Part of the research was presented at the second World Agroforesty Congress in Kenya, August 2009; part of the results will also be presented in San Francisco, CA, at the American Chemical Society 239th National Meeting in March 2010.

Data gathered for the extensive literature review were compiled into a digital database. Theoretical models for removal efficacy were derived and tested against data from the surveyed literature using statistical analyses methods.

The relationship between buffer width and pollutant removal was successfully captured by a model, and buffer slope was shown to be linearly associated with sediment removal efficacy for slopes less than or equal to 10% or negatively for slopes greater than 10%. The effects of vegetation were demonstrated by the results that buffers with trees have higher nitrogen and phosphorus removal efficacy than buffers with grasses or mixtures of grasses and trees. However, soil drainage type did not show a significant effect on pollutant removal. Based on the scientists’ analysis, a 30-m buffer under favorable slope conditions (about 10%) removes more than 85% of all the studied pollutants.

The study reveals the quantitative relationships between mitigation efficacies of vegetated buffers and their width, vegetation type, and slope. The results from this review and data analysis were confirmed by a group of researchers from the USDA in Oklahoma and University of Kenya in Naribo through field experiments.

As Minghua Zhang, one of the authors of the study, notes, “This information could serve as baseline data for setting guidelines for buffer implementation and installation. In addition, estimated parameters could facilitate further investigations on buffer efficacy beyond field scale. The results of this study will assist in future modeling efforts to study the mitigation efficacy of vegetated buffers for reducing pollutants in agricultural runoff at watershed scale.”

The full article is available for no charge for 30 days following the date of this summary. View the abstract at http://jeq.scijournals.org/cgi/content/abstract/39/1/76.

The Journal of Environmental Quality, http://jeq.scijournals.org is a peer-reviewed, international journal of environmental quality in natural and agricultural ecosystems published six times a year by the American Society of Agronomy (ASA), Crop Science Society of America (CSSA), and the Soil Science Society of America (SSSA). The Journal of Environmental Quality covers various aspects of anthropogenic impacts on the environment, including terrestrial, atmospheric, and aquatic systems.

The American Society of Agronomy (ASA) www.agronomy.org, is a scientific society helping its 8,000+ members advance the disciplines and practices of agronomy by supporting professional growth and science policy initiatives, and by providing quality, research-based publications and a variety of member services.

Sara Uttech | EurekAlert!
Further information:
http://www.agronomy.org

Further reports about: Agronomy BMPs Science TV Vegetated efficacy environmental risk pollutant removal

More articles from Agricultural and Forestry Science:

nachricht Researchers discover a new link to fight billion-dollar threat to soybean production
14.02.2017 | University of Missouri-Columbia

nachricht Important to maintain a diversity of habitats in the sea
14.02.2017 | University of Gothenburg

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Switched-on DNA

20.02.2017 | Materials Sciences

Second cause of hidden hearing loss identified

20.02.2017 | Health and Medicine

Prospect for more effective treatment of nerve pain

20.02.2017 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>