Last date for submission of paper: 17-Jun-2020; Contact person: Rolin; The 7th International Hydrology, Ocean and Atmosphere Conference HOAC 2020 was planned to be held during March 13-15, 2020 in Guilin, China. This Conference will cover issues on Hydrology, Ocean, Atmosphere, and other related topics. It dedicates to creating a stage for exchanging the latest research results and sharing the advanced research methods in related fields.