中文摘要：

为了研究鸭子荡水库的二维水流问题,用图像处理方法结合谷歌地球（GE）软件对该水库进行地形的前处理。通过图像拼接、数学形态学和实测资料相结合的方法获取该水库的初始地形,对建立的平面二维RNG k-ε紊流数学模型中的水流模块给出合理的边界条件和初始条件,并采用有限体积法离散方程,通过阵面推进法划分网格,对水库流场和入水口、取水塔附近的断面垂线平均流速进行数值模拟。结果表明,利用图像处理方法结合GE软件能够得到精确、详细的水库复杂地形。在此基础上进行了水库流场数值模拟和关键位置的断面垂线平均流速数值模拟,模拟结果和实测结果较吻合。

英文摘要：

In order to study the two-dimensional（ 2D） flow in the Yazidang Reservoir,terrain pretreatment was carried out using the image processing method and Google Earth（ GE） software. The initial terrain of the reservoir was obtained through image mosaicking, mathematical morphology, and measured data. A 2D RNG k-ε turbulence model was established,reasonable boundary conditions and initial conditions of the flow module of the established model were set,the equations were discretized using the finite volume method,and a mesh was divided using the advancing-front method. The flow field in the reservoir and the depth-averaged velocity at sections near the water inlet and the water power were simulated. The results show that accurate and detailed reservoir terrain can be obtained using the image processing method and the GE software. The numerical simulation results of the flow field and the depth-averaged velocity at critical positions show that the simulated and measured values are in strong agreement.