Spatio-Temporal Variations of Water Quality (Case Study: Talar River, the Province of Mazandaran)

Nowadays the quality of surface water is a serious matter of concern to water authorities. Certain human activities، as well as some natural processes، contaminate surface water resources and decline their quality for drinking، industrial، and agricultural uses. Planning for preparing a reliable guideline for evaluation of water quality is not possible without understanding the spatio-temporal variations of stream water. In this study، spatio-temporal variations of 12 water quality parameters: total dissolved solids (TDS)، electrical Conductivity (EC)، acidity (pH)، cations (Ca، Mg، Na and K)، anions (HCO3، CL and SO4)، sodium absorption ratio (SAR) and total hardness (TH) were investigated at six stations in the Talar Watershed during the 1382 - 1390 study period at the significant level of 0. 01