Water Quality and Its Relation with Chlorophyll-a in Dry Season,in a Reservoir of Mediterranean Region

摘要

This study was carried out between June 2004 and August 2004,in Seyhan dam,Adana,Turkey.This lake is under severe anthropogenic pressure and region has a typical Mediterranean climate.Water samples were taken weekly from two stations in littoral and pelagic zones.The temperature,pH and conductivity were measured by a CTD.Chlorophyll-a,NO2-N,NO3-N,NH4-N,SRP and SRSi were analyzed according to the standard methods.Differences among weeks for water quality variables were statistically significant (p < 0.01).Chlorophyll-a showed significant positive linear correlation with temperature,NH4-N and conductivity while NO2-N,NO3-N and TDS were inversely related (p < 0.01).Results show that Seyhan,dam has not yet reached the eutraphic stage.Consequently,more extensive studies are needed because the lake is thought to be the most changing site in region as a result of the increasing agricultural,aquacultural and human population.A water quality program should be established to conservation of lake quality.