1. Hainan Key Laboratory of Marine Geological Resources and Environment, Haikou 570206, China
2. Hainan Institute of Hydrological and Geological Engineering Exploration, Haikou 571100, China
3. School of Civil Engineering and Architecture, Hainan University, Haikou 570228, China
4. School of Information and Communication Engineering, Hainan University, Haikou 570228, China
5. Hainan Institute of Geological Survey, Haikou 571100, China