Source specific fecal bacteria modeling using soil and water assessment tool model

摘要: Fecal bacteria can contaminate water and result in illness or death. It is often difficult to accurately determine sources of fecal contamination, but source tracking help identify non-point such as livestock, humans wildlife. The Soil Water Assessment Tool (SWAT) microbial sub-model 2005 was used evaluate source-specific using three years (2004-2006) observed modified deterministic probability data, well measure hydrologic quality data. This study modeled a model previously calibrated for flow, sediment total coliform (FCB) concentration. SWAT at the Rock Creek sub-watershed, validated Deer verified Auburn sub-watershed then entire Upper Wakarusa watershed predicting daily sediment, nutrients, bacteria, bacteria. Watershed characteristics humans, wildlife bacterial were first together with separate combinations FCB concentration: livestock human, human Model results indicated both coefficient determination (R(2)) Nash-Sutcliffe Efficiency Index (E) parameters ranging from 0.52 0.84 flow 0.50-0.87 (good very good agreement); 0.14-0.85 phosphorus (poor -3.55 0.79 nitrogen (unsatisfactory agreement) -2.2 agreement). generally determined decreased agreement each single (R(2) E range -5.03 0.39), potentially due (BST) uncertainty spatial variability. contributes new knowledge modeling will further understanding that exists modeling.