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PostersCrop Protection2010

Higher Tier Modelling of Groundwater Concentrations from Pesticides Used on Rice

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The Med-Rice model is used to determine Predicted Environmental Concentrations in groundwater (PECgw) for pesticides used on rice. Higher tier approaches have not been established under EU guidance to address situations when the Med-Rice model generates a PECgw greater than 0.1 ug/L. This poster compares several options for conducting higher tier modelling of PECgw by linking the RICEWQ (a pesticide fate and transport model developed to simulate the seepage, flooding conditions, overflow, and controlled releases of water associated with rice production) with several leaching and/or groundwater models including VADOFT (Vadose Zone Flow and Transport model) and HYDRUS-1D (unsaturated flow and solute transport model).

Ritter A.M. , J.M. Cheplick, and W.M. Williams. Higher Tier Modelling of Groundwater Concentrations from Pesticides Used on Rice. SETAC Europe 20th Annual Meeting, Seville, Spain. 23-27 May 2010.