Abstract
A model was presented for simulating the load of pesticides discharged from golf links during storm runoff. The model consisted of two components. The hydrological component which was based on a model with a series of non-linear tanks estimated the rate of surface flow and interflow in the basin. The chemical component estimated the chemical load on the golf links by the function of the application amount, the amount retained in the soil, and the discharge rate from the soil. In this paper Simazine [2-chloro-4, 6-bis(ethylamino)-1, 3, 5-triazine], a herbicide widely used in Japan was analyzed. The experimental basin included 52.9 ha of the golf links and 26.6 ha of the neighboring upstream forested basin. The values simulated on an hourly basis during a precipitation event of 36.5 mm on May 23-25, 1991 were consistent with those observed. The discharging load of Simazine was strongly affected by the rainfall intensity, the application ammount, and the capacity of regulating pondage.
