点击次数：

论文类型：期刊论文

发表时间：2022-06-30

发表刊物：环境科学学报

所属单位：化工学院

卷号：35

期号：9

页面范围：2900-2909

ISSN号：0253-2468

摘要：The mass transport and its temporal and spatial distributions in the tidal rivers are not only influenced by the river flow and tide, but also affected by human activities, such as the operation of barrage gate. Based on the abacus type grid system, a three-dimensional hydrodynamic and mass transport numerical model was constructed with the combined effects of tide, river flow and barrage gate operation. This model was applied to study the feature of density stratification, the temporal and spatial distribution of salinity and dissolved oxygen concentration as well as impact factors in a tidal river. The result of computing results agree well with the observed data, indicating that the three-dimensional model has the capability to simulate the hydrodynamics and mass transport in the tidal river. It is found that the hypoxic water body took place initially at the front of the salt wedge. Under the comprehensive influences of salinity stratification strength, residence time of sea water and the barrage gate operation, the trend of a continuously decreasing dissolved oxygen concentration began to arise, which was followed by the extention of hypoxic water body from upstream to downstream of the estuary and subsequently the flush of hypoxic water body caused by the open barrage gate. ?, 2015, Science Press. All right reserved.

备注：新增回溯数据