Investigation of temporal and spatial trend of water quality parameters in view of weather fluctuations using GIS; Mashhad Plain

Temporal and spatial trend of water quality parameters were investigated in this study. These parameters were zoned according to agricultural and drinking water classifications using Booleans logic and GIS. Temporal trends for TDS, pH and EC were evaluated, and effect of different factors especially climate change were investigated in 3-year periods. The results showed that main factors affecting the temporal and spatial variations respectively were human activities, climate change, water temperature and transfer of pollutants from outside of the studied area.