3-Dimensional Mathematical Model for the Transportation of Fe and Mn in Arha Reservoir
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摘要: 通过描述Fe、Mn在水库中的氧化还原变化、吸附、解吸、沉降及再悬浮,考虑水流运动对Fe、Mn迁移变化的影响,研制了水库三维水动力模式及三维Fe、Mn迁移变化模式,从而建立了完整的水库三维Fe、Mn迁移分布模拟模型。该模型在阿哈水库实际运用效果良好。模拟结果表明,水库水流运动整体流速较小,Fe、Mn在水库中平行迁移运动缓慢。进入水库的Fe、Mn负荷大量沉入库底,在水体缺氧条件下,底质中Fe、Mn重新释放,形成明显的Fe、Mn分布垂直梯度,造成水库下层Fe、Mn大大超过国家生活饮用水质量标准。Abstract: Considering the effect of water flow on the transportation of Fe and Mn and describing its processes of redox,sorption,desorption,deposition and re-suspension in the reservoir,a joint 3-dimensional mathematical model for the hydrodynamics and the transportation of Fe and Mn was developed.The model simulated both horizontal and vertical gradients of Fe and Mn in Arha Reservoir.It was found that Fe and especially Mn stratify in accordance with the stratification of DO during summer.The redox cycles across the water sediment interface play a principal role in the rise of Fe and Mn concentrarions in the overlying water.It was also found that Fe and Mn loads from the tributaries have a carryover effect on the water quality through a secondary contamination in the reservoir.
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Keywords:
- reservoir /
- Fe /
- Mn /
- 3-dimensional model /
- transportation
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