Seite - 395 - in Book of Full Papers - Symposium Hydro Engineering

COMMISSION INTERNATIONALE DES GRANDS BARRAGES ------- VINGT-SIXIÈME CONGRÈS DES GRANDS BARRAGES Autriche, juillet 2018 ------- APPLICATION OF WATER QUALITY INDEXES FOR QUALITY ASSESSMENT OF ZAYANDEHROOD DAM RESERVOIR Masoud MIRMOHAMMAD SADEGHI1, Niaz VAHDATPOUR1, Ali BASIRPOUR1, Zahra MESMARIAN1, Seyed Reza ROOZEGAR1, Zohreh SHEKLABADAI1, Morteza SHAHMORADI1, Ali FATEHIZADEH2, Mohammad GHASEMIAN2, Afshin EBRAHIMI2, Ensiyeh TAHERI 2 , Mohammad Mehdi AMIN2, Forouzan HEMAMI2, Nasim RAFIEI2 1Devision of Water and Environment Research, 2Environment Research Center and Department of Environmental Health Engineering, School of Health, ISFAHAN UNIVERSITY OF MEDICAL SCIENCES, ISFAHAN, IRAN 1. INTRODUCTION The storage water in Zayandehrood dam reservoir is supplies drinking water demand of around 5 million peoples and also for agricultural and industrial consumption. The reservoir nominal capacity is 1.5 B m3 and nowadays deceased to less than 200 M m3 due to drought period. The present study aimed to explain the water quality of the reservoir with water quality index (WQI), national sanitation foundation water quality index (NSFWQI) and Carlson's trophic state index (CTSI). 2. MATERIALS AND METHODS Five points were sampled within dam reservoir form 2016 to 2017. At each point, for bacterial, nutrient, heavy metal, and pesticide analysis, the surface (< 1 m depth) samples were collected and transferred to the laboratory. The other parameters including chlorophyll a and physicochemical parameter were measured on site by using CTD (Sea & san Technology: CTD 75M). The WQI, NSFWQI and CTSI were calculated. 3. RESULTS AND DISCUSSION The pH and EC was relatively stable among and within the stations. Seasonally, high levels of turbidity were observed mainly during the cold weather. 395