1. School of Civil Engineering and Architecture, Xi’an University of Technology Xi’an, Shaanxi, China
2. School of Civil Engineering and Architecture, Xi’an University of Technology Xi’an, Shaanxi, China (Corresponding author), e-mail: shijp@xaut.edu.cn
3. State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area, Xi’an University of Technology, Xi’an, Shaanxi, China