Publication | Closed Access
APPLICATION OF A WATERSHED MODEL TO EVALUATE MANAGEMENT EFFECTS ON POINT AND NONPOINT SOURCE POLLUTION
215
Citations
0
References
2001
Year
Surface RunoffEngineeringWater ResourcesWatershed ManagementEnvironmental EngineeringCatchment ScaleEnvironmental Impact AssessmentWastewater Treatment PlantEnvironmental QualityDaily LoadWater QualityNorth Bosque RiverWater Quality ManagementHydrologyWaste ManagementWastewater TreatmentEnvironmental Quality ManagementNutrient Management
A Total Maximum Daily Load (TMDL) program has been initiated in the North Bosque River Watershed in Texas,USA, where point and nonpoint sources of pollution are of a concern. The Soil and Water Assessment Tool (SWAT), whichhad been validated for flow and sediment and nutrient transport, was applied to quantify the effects of Best ManagementPractices (BMPs) related to dairy manure management and municipal wastewater treatment plant effluent. Results arepresented for the period from 1960 through 1998 for three sites along the North Bosque River. Results are presented as annualtimeweighted concentrations (average of the daily load divided by daily flow over a year) and annual flowweightedconcentrations (total cumulative load divided by total cumulative flow over a year). The wastewater treatment plant BMPsresulted in greater improvement in timeweighted instream soluble phosphorus concentrations than dairy BMPs. On the otherhand, dairy BMPs made greater differences in flowweighted concentrations. This study showed that SWAT could be a usefultool for studying the effects of alternative management scenarios for pollution control from point and nonpoint sources in largewatersheds.