Fatemeh karimi - Department of agriculture and natural resources, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
Ebtesam ebadat - MSc student of environmental pollution, Science and Research Branch, Islamic Azad University

As a major ecosystem type, wetland provides invaluable ecological services. Environmental pollution, especially pesticide runoffs should be paid more attention to keep wetlands healthy. This paper propose Methodology namely, deterministic approach. Deterministic approach or risk quotient (RQ) was calculated using the water concentration and toxicant reference values of five pesticides (DDT, Aldrine, Dieldrin, Ametryn, Lindane).The results of deterministic approach showed that the RQ for shirbot or large scaled barb (Barbus grypus), benni (Barbus sharpeyi), golden barb (Barbus luteus) and insect larvae (Chironomus sp.) is high and the environment is exposed to higher risk. It is recommended that proper countermeasures should be implemented to reduce the risks

Ecological Risk Assessment, Agricultural Pesticide, Shadegan Wetland, Iran