تعيين شاخص هاي زيستي كيفيت آب رودخانه قشلاق سنندج ، ايران

Determination of biotic indices of water quality in Gheshlagh River, Sanandaj, Iran

Benthic macroinvertebrates were investigated to assessment water quality in Gheshlagh River. Samples were collected from three stations by surber sampler in May, June and July 2007. Benthic macroinvertebrates were identified in the family level and then water quality was determined by using of Hilsenhoff method and FBI table. In this study, 12 families were observed: 8 families of Arthropoda Phylum, 3 families of Annelida phylum, 1 family of Platyhelminthes phylum. Ephemeroptera, Plecoptera and Amphiopda (Insects) dominated in stations 1 and 2 that these orders are indices for high quality waters, While in station 3 with fairly significant and significant organic pollutions, Platycnemidae family of Odonta order and Glossiphonidae family of Hirudinea order were identified as index families of polluted waters with high tolerance. On the basis of FBI index, organic pollution grade and water quality was very good at station 2 for all sampling months as well as station 1 except June (good), but it was good in May, fair in June and fairly poor grades in July at station 3.