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
 Food Animal Environmental Systems Research: Bowling Green, KY
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                                    Software
                People

                    Staff Listing
                                    Careers


        


                    Models & Software
                        Sorption Isotherm Spreadsheets
                                    Annual Phosphorus Loss Estimator (APLE) Model
                                    Modified Arcsine Log Calibration Curve (ALCC)Search small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Midwest Area Bowling Green, Kentucky Food Animal Environmental Systems Research 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
                                            Loughrin, Johnitem
                                            Bolster, Carl
  Submitted to: Kentucky Water Resources Research Institute Symposium
                                    Publication Type: Proceedings
                                    Publication Acceptance Date: 2/10/2011
                                    Publication  Date: 6/28/2011
                                    Citation: Loughrin, J.H., Bolster, C.H. 2011. Seasonal variation in water quality and dissolved methane of Barren River Lake. Kentucky Water Resources Research Institute Symposium. 13-15. http://www.uky.edu/WaterResources/2011_Proceedings.pdfInterpretive Summary:
                                Technical Abstract: Using a method for water collection that we recently developed, we monitored water quality and dissolved methane in Barren River Lake for eleven months in 2009.    During the spring and winter months nitrate concentrations were essentially equal throughout the water column at eight to six mg L/L. During summer stratification, on the other hand, nitrate concentrations fell and ammonium concentrations increased with depth. In the absence of thermal stratification, manganese concentrations throughout the water column were low.  In the summer, however, manganese concentrations were high the lake bottom, indicating dissolution from sediments.  Other metals such as iron and were not elevated during stratification.  Elevated manganese concentrations were not likely due to depressed pH that occurred during stratification.  In the absence of stratification, pH was essentially equal throughout the water column.  While there were pronounced differences in pH due to depth during stratification, however, this was due more to increases in pH at shallower depths rather than decreases in pH near the lake bottom. Methane concentrations at the lake bottom were elevated during summer stratification, indicating anaerobic decomposition of detritus in the lake.  As a result, significant fluxes of methane are likely to occur from the lake during the summer months.


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