1. State Key Laboratory of Eco‐hydraulic in Northwest Arid Region Xi'an Univ. of Technology Xi'an Shaanxi 710048 China
2. School of Science, Xi'an Univ. of Technology Xi'an Shaanxi 710054 China
3. Institute of Water Resources and Hydroelectric Engineering Xi'an Univ. of Technology Xi'an Shaanxi 710048 China