Changing Climatic Conditions Affect Surface Water Quality in Southwestern Louisiana in the United States

Abstract
Climate change impacts on rising temperatures, changes on rainfall patterns,drought, flooding, sea level rise, glacier melts, and incidence of diseases andparasites are reported worldwide in recent decades. This study investigatesthe effects of changing climatic conditions – particularly air temperature andprecipitation, on surface water temperatures and other water quality param-eters, such as the conductivity, dissolved oxygen (DO), pH, and turbidity.A statistical analysis was performed on air temperature and precipitationdata from 1980 to 2005 to determine the changing climatic conditions. Thewater quality data for four waterbodies in southwestern Louisiana was also analyzed to examine trends between the air temperature and surface watertemperatures, precipitation and surface water temperatures, and precipitationand water quality parameters. There was an unexpected increase in surfacewater temperature with an increase in precipitation. As the precipitation andair temperature increased, so did the surface water temperature. This increasein surface water temperature was correlated with decrease in DO levels. Theincrease in precipitation also correlated with an increase in pH and turbidityin Bayou Plaquemine Brule. This study’s findings could be utilized in adynamic climate modeling system to provide more accurate predictions ofclimate change in southwestern Louisiana.