Leaching risk assessment of pesticides from soil as function of soil properties, pesticide properties and rainfall characteristics using HYDRUS 1D numerical model

It has been observed through experiments that many chemicals especially pesticides found in streams and groundwater bodies are transported surface runoff and/or preferential flow processes. Researchers have also proved the timing nature of rainfall since last pesticide application often described as significant controls on transport Rainfall variability is now considered climate drivers contaminant transport. The amount pathways to respectively shown be strongly correlated with concentration chemical a thin near-surface layer soil immediately prior such an event. regarded source where all dynamics solute starts. store from which they leached by both fast episodic well slow steady In this research, we seek better understand idea driver-source-trigger concept subsurface. driver (rainfall variability) triggers (surface flow) (a layer) for stream groundwater. methodology study use HYDRUS 1D Numerical Model.