Investigation on the Trend of Water Quality Changes of Taft County Active Qanats

Subject Areas :

سیما Salameh Nejad ¹ , MH Ehrampush ² , سید احمد Mirbagheri ³ , AM Javid ⁴

1 - کارشناس ارشد محیط زیست دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران
2 - دانشیار دانشکده بهداشت دانشگاه علوم پزشکی شهید صدوقی یزد
3 - دانشیار دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران
4 - دانشیار دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران

Received: 2016-09-05 Accepted : 2016-09-05 Published : 2013-12-22

Keywords: Water Quality, GIS, Pollutant sources, Taft City, qanat,

Abstract :

The quality of Qanats in Yazd situation is more serious than other water sources.this study is important.in thisresearch we studied water qualitative parameters(FecalColiform,Turbidity,pH,Temperatur,Calsium,Mangsium,Potassium,TDS,BOD,Nitrate and Phosphate) and to assistagricultural and WQI index is corrected. descriptive study was conducted from 5 digits represent the cityselected active qanats Taft during the six month period, 30has been discussed. assess water quality for public useWQI index score obtained for stations S1, S2, S3, S4, S5 respectively 59,83,79,57,58 and the SAR estimateWater quality for agriculture respectively is 1/3, 6/4, 4/4, 3,3. The quality of agricultural water to diagramWilcox stations S1, S2, S3, S4, S5, respectively, in class C4S1, C3S1, C3S1, C3S1, C3S1 placed. According tothese results and compare them with the relevant standards, it was determined that the water stations foragriculture based on high quality SAR and agriculture on water quality in Wilcox diagram to aid stations S1, S2,S3, S4, S5, respectively, S1in classbad and the rest of the stations classified as acceptable are. purposes ofstations S1, S2 and S5 qualifies as threatened, station S3 fairly moderate and S4 with good quality is. . Generaltrend of water quality for agricultural and public purposes from north to south in order to improve water quality‌ is But because most of the parameters are incremental changes in water quality stations is worse