U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 close



Research
                Research Home
                            National Programs
                            Research Projects
                            Scientific Manuscripts
                            International Engagement
                            Scientific Software/Models
                            Databases and Datasets
                            Office of Scientific Quality Review
            Media
                News & Features
                            Multimedia
                            Briefing Room
                            Down on the Farm
                            Press Room
                            Science in Your Shopping Cart
                            Scientific Discoveries
                            Tellus
                            Under the Microscope
            About ARS
                About ARS Home
                            Staff Directory
                            Labs and Research Centers (Map)
                            Headquarter Offices
                            Organizational Chart
                            Employee Services (REE Employees Only)
                            Office of Outreach, Diversity, and Equal Opportunity
            Work With Us
                Work With Us Home
                            ARS Vacancies at USAJOBS
                            Careers at ARS Information
                            Scientific Collaborations
                            Extramural Agreements
                            1890 Faculty Research Sabbatical ProgramSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            Rice, Clifforditem
                                            Bialek Kalinski, Krystynaitem
                                            Angier, Jonathanitem
                                            Sadeghi, Aliitem
                                            McCarty, Gregory
  Submitted to: Society of Environmental Toxicology and Chemistry (SETAC)
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 11/20/2002
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary:
                                Technical Abstract: Riparian buffer areas are widely touted for their ability to mitigate pollutants from agricultural fields.  We are studying this abatement process for the pesticides atrazine and metolachlor, using a highly instrumented riparian wetland site located in Beltsville, Maryland. This site has clearly delineated flow pathways that intersect a well-defined riparian area with a first order stream.  An important objective was to compare pesticide transport through this system with the transport of nitrate and other nutrients. Initial work involved characterizing the distribution of the parent compounds and their degradation products within the system.  Another objective was to quantify the pesticide loads entering the stream.  Early results showed that atrazine, deethylatrazine, and deisopropylatrazine losses followed the same distribution pattern as nitrate.  Other compounds, such as hydroxy atrazine and metolachlor and its degradation products, appear to behave quite differently.  In addition to hydrologic inputs to the system, another important pathway for pesticides to enter the riparian system is atmospheric deposition and subsequent sorption of the aerosol or particulate drift or gas onto surfaces (plants or surface litter).  During rain events, these sorbed materials are washed off directly into the buffer area.  Analyses of rain collected beneath the tree cover in the buffer area showed that 90% more of metolachlor ethane sulfonic acid was in the canopy through-fall, and 85% more of hydroxy atrazine was in the stem-flow than in the rain falling outside the forested area.  Results will provide information for characterizing and modeling pesticide processes in riparian wetland systems.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov