Experimental Anaysis on Moving Characteristics of Pesticides Scattered in Patting-greens by Heavy Rain

The purpose of this study is to investigate the moving characteristics of pesticides scattered in patting-greens caused by heavy rain.The experimental research was carried out with sand-layer column models. The hydraulic characteristics of unsaturated infiltration were discussed with the experimental results of tensiometers and thermometers. The pesticides concentrations of pore-water and soil-samples were determined by method of gaschromatography (FTD).Most of the scattered pesticides were adsorbed into soil particles of the shallow layer and therefore the squeezed amounts into groundwater were very little.