Int. J. Hydrology Science and Technology, Vol. 9, No. 3, 2019 221 Copyright © 2019 Inderscience Enterprises Ltd. Determination of the height of the vertical filter for heterogeneous Earth dams with vertical clay core Saeid Salehi-Hafshejani and Mohammad Shayannejad Water Engineering Department, Isfahan University of Technology, Isfahan, Iran Email: Saeedsalehi100@gmail.com Email: Shayannejad@cc.iut.ac.ir Hossein Samadi-Broujeni Water Engineering Department, Shahrekord University, Shahrekord, Iran Email: Samadi157@yahoo.com Ali-Reza Zarraty Water Resource Management, Islamic Azad University of Najafabad, Isfahan Province, Iran Email: zarraty@gmail.com Bahareh Soltani Water Engineering Department, Isfahan University of Technology, Isfahan, Iran Email:mbso_2008@yahoo.com Elham Mohri-Esfahani Engineering in Irrigation and Drainage, Isfahan University of Technology, Isfahan, Iran Email: elham4447@gmail.com Majedeh Haeiri-Hamedani and Saeid Eslamian Water Engineering Department, Isfahan University of Technology, Isfahan, Iran Email: haeri1015@gmail.com Email: saeid@cc.iut.ac.ir