The Role of Agricultural and Residential Land-uses on Organophosphorus and Organochlorine Pesticides Residues in Water and Sediments of Siahrud River, Qaemshahr

In the present days, there are more concerns about using Irregular use or misusing pesticides and its effects on environment and human health and this concern is to some extent that needs the programs for decreasing to use pesticides as a part of the agricultural major strategy and the other uses. The lack of basic information about pesticides in environment is a limitation for determining standard values, so according it setting up the programs for decreasing to use pesticides is possible. Considering to these descriptions, the importance of Pollution monitoring, because of pesticides and its relation with relevant uses in Siahrud River that one of the important rivers in the north of iran is clearly appeared In terms of human activity and environmental. Pesticide standards were purchased from Sigma-Aldrich and all reagents purchased from Merck. The area of Siahrud with an area of over 10070 hectares is placed in Mazandaran province in Qaemshahr city in Iran, The length of this river is 5 km. In this research, sampling was done in three season, summer (August), autumn (November) and spring (May) 2012. For selecting sites, it was used land-use map. Each site was placed between two Land-uses and it was indentified 7 site based on it(Table 1). In each site, it was taken 3 water samples, (3 replications) using horizontal water sampler and 3 sediment samples by using sediment core sampler. The sediment samples was taken from the upper 5cm of the sediment surface and all samples were placed in glass containers and were transported to the laboratory in ice.