1. School of Resources and Environmental Engineering Hefei University of Technology Hefei Anhui China
2. State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment, CAS Xi'an Shanxi China
3. Department of Geological Sciences University of North Carolina Chapel Hill NC USA
4. Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction, College of Ocean and Meteorology Guangdong Ocean University Zhanjiang Guangdong China