Abstract:In Yanzao River in Yazhou District of Sanya City, there are some problems such as excessive pollutants, substandard embankment elevation, incomplete vegetation community protection structure in buffer zone on land side, and lack of hierarchical mangrove growth on both sides. In order to implement the water pollution treatment, the pollution interception and source control project, the river dredging project, the river levee project, the estuary building project, the landscape projects and the sluice gate project are carried out, in which the construction of estuary building project is mainly for the diversion and sand embankment of the estuary. By comparing and analyzing the scale and layout of the diversion and sand embankment, a more reasonable engineering scheme is determined. The section of designed diversion and sand embankment has played a positive role in preventing the siltation of the estuary, improving the regional water environment and ensuring the regional water security.