汉江河道水流模型的研究与应用

为分析输电线路工程对汉江河道行洪水位和流场的影响，采用有限体积法，研究建立了河道平面二维数学模型．对工程兴建前后工程所在河段的水流运动进行数值模拟和计算，研究结果表明，建立在河滩上的输电线塔基自身阻水作用引起的局部流速最大增加值为0．023m／s，断面平均水流流速增加值小于0．01m／s．塔基附近上下游400m的范围内局部流速流向发生微小的变化，流速最大变化幅度很小，对河段的防洪影响不大．

Study and Application of 2-D Mathematical Model on HAN JIANG River Flow

To analyze the influence of transmission lines engineering on flood water level and flow field of Han Jiang River, a two-dimensional mathematical model was established by adopting the finite volume method. The effects of engineering construction on the reach where the engineering lays, is numerically simulated and calculated. Research results show that the maximum increment of 0.023 m/s is caused by the resistance effect of electric power pylon footing on the reach, the addition of mean flow velocity at a crosssection. Within 400 meters around pylon footing, local flow velocity and direction have little variation, and the range of maximum velocity variation is also little, so that it has obvious effect on river reach.