论文部分内容阅读
针对三峡水库蓄水运用后支流库湾春季水华频现问题,利用MIKE 21模型建立了香溪河—三峡库区整体平面二维水动力数学模型,对春季不同水文条件下香溪河口回水区的流速进行了数值模拟。计算结果表明,三峡水库单独调控时,小于香溪河库湾水华的临界流速0.05 m/s,而支流水库单独调控时,在丰水年香溪河口流速可大于0.05 m/s,仅利用三峡水库小幅度水位变动(0.6~1.0 m/d)对支流库湾流速的改善效果十分有限,而利用干支流水库对香溪河库湾流速的联合调控效果明显,可适度控制三峡库区支流库湾水华的爆发。
Aiming at the frequent spring flood season in the tributary bank of the Three Gorges Reservoir, the plane two-dimensional hydrodynamic model of Xiangxi River - Three Gorges Reservoir was established by using the MIKE 21 model. In the spring, The velocity of the zone was numerically simulated. The calculation results show that the critical flow velocity of the Three Gorges Reservoir is less than 0.05 m / s when controlled by the Three Gorges Reservoir alone. When the tributary reservoir is controlled separately, the velocity of the flow in the Xiangxi River mouth can be more than 0.05 m / s in the abundant year, The effect of small amplitude water level fluctuation (0.6-1.0 m / d) in the Three Gorges Reservoir is very limited to the improvement of the flow velocity in the tributaries of the Three Gorges Reservoir. The joint regulation and control effect of the tributary reservoir on the flow velocity in Xiangxi River Bay is obvious and the tributaries Bay outbreak of the bloom.