水体中污染物的迁移、扩散与水体更新时间密切相关。基于EFDC建立了宽浅型水库水动力三维数学模型，并用水库实测资料对模型精确性进行了验证。首先利用验证后的数学模型模拟了宽浅型水库365 d流速场和水体更新时间，得到了其水动力特性；然后模拟了无风工况下的水体更新时间，通过对比得到了风对宽浅型水库水体更新时间的影响。研究成果可为宽浅型水库的生态调度提供理论依据。

The transportation and diffusion of pollutants in water body are closely related to the water renewal time, so knowledge of the water renewal time of reservoir is useful for understanding the temporal and spatial distribution of pollutants. In this paper, a three-dimensional numerical model of hydrodynamics in the wide-shallow reservoir was developed based on EFDC, and then the model was validated using the field data. First, the validated model was used to simulate the flow velocity field at 365 days and water renewal time of wide-shallow reservoir in order to obtain the hydrodynamics characteristics. Then, the water renewal time of reservoir was simulated under the conditions of no wind in order to obtain the impacts of wind on the water renewal time of wide-shallow reservoir. The results can provide theoretical reference for the ecological regulation of wide-shallow reservoir.

河北省教育厅资助项目（QN20131021）