Herbicide Runoff from Upland Piedmont Watersheds-Data and Implications for Modeling Pesticide Transport

摘要: Runoff and persistence of selected herbicides were studied on four small Piedmont watersheds in Georgia during growing seasons. This is part a study designed to provide data for developing testing mathematical models agricultural chemical transport. Seasonal runoff losses determined relative watershed management, herbicide type persistence, mode application, time relation application timing. usually < 2% the unless large volumes generated shortly after application. Average storm concentrations correlated with at 0- 1- cm depth increment soils runoff. Paraquat (predominantly sediment associated) well positive product soil concentration Equations describing soilbased transfer power functions exponents near unity form: Y = xᵇ. Simple relationships such as those developed this along hydrology erosion/sediment may he useful predicting pesticide potential when assessing impacts management decisions. The next step would be describe key practices terms these coefficients exponents.