1Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas, Ministry of Education,
Chang’an University, Xi’an 710054, P.R. China
2Shanxi Key Laboratory of Exploration and Comprehensive Utilization of Mineral resources,
Xi’an 710054, P.R. China
Submission date: 2016-11-07
Final revision date: 2016-12-31
Acceptance date: 2017-01-02
Online publication date: 2017-05-08
Publication date: 2017-05-26
Pol. J. Environ. Stud. 2017;26(3):1375–1383