Predicted transport of pyrethroid insecticides from an urban landscape to surface water.

ABSTRACT: The authors developed a simple screening-level model of exposure of aquatic species to pyrethroid insecticides for the lower American River watershed (California, USA). The model incorporated both empirically derived washoff functions based on existing, small-scale precipitation simulations and empirical data on pyrethroid insecticide use and watershed properties for Sacramento County, California, USA. The authors calibrated the model to in-stream monitoring data and used it to predict daily river pyrethroid concentration from 1995 through 2010. The model predicted a marked increase in pyrethroid toxic units starting in 2000, coincident with an observed watershed-wide increase in pyrethroid use. After 2000, approximately 70% of the predicted total toxic unit exposure in the watershed was a

SUBMITTER: Jorgenson B 

PROVIDER: S-EPMC3949623 | biostudies-literature | 2013 Nov

REPOSITORIES: biostudies-literature