上游来水与下游潮位对河口含氯度的影响——以磨刀门河口为例

发布时间：2018-01-04 08:24

本文关键词：上游来水与下游潮位对河口含氯度的影响——以磨刀门河口为例　出处：《中国农村水利水电》2017年04期 　论文类型：期刊论文

【摘要】：分析咸潮上溯的规律以及对河口含氯度的模拟预测对河口地区供水安全具有重要的意义。以珠江三角洲磨刀门河口为例,上游流量和下游潮位作为边界条件,建立基于BP神经网络的含氯度变化模拟模型,通过对模型参数进行率定与验证,最终得出模拟结果与实测含氯度数据较为一致,河口含氯度与上游径流量和下游潮位之间的映射关系良好。基于此,研究上游径流量变化对含氯度的影响及不同来水频率和潮位设计方案下的含氯度变化。结果表明:当上游水电站采用降序泄水时可有效地抑制河口咸潮上溯;同一设计潮位方案下,特枯来水年份(97%来水频率)平岗泵站日平均含氯度较正常来水年份(90%来水频率)平均增幅达到3.3倍。
[Abstract]:Analysis of salt water intrusion and the simulation and prediction of the estuarine chlorinity has important significance to the safety of water supply in estuary area. In the Pearl River Delta Modaomen Estuary as an example, the upstream and downstream tidal flow as the boundary condition, the simulation model of changes of BP neural network based on the chlorinity, through the calibration and verification of the model parameters. Finally the simulation results and the measured data of chlorinity consistent mapping between estuarine chlorinity and upstream runoff and downstream tide well. Based on this, the research of upstream runoff of chlorinity and different inflow frequency and tidal level design of the chlorinity changes. The results showed that: when the descending water upstream hydropower the station can effectively suppress the salinity intrusion; the same scheme design tide, low water year (97% water frequency) Pinggang pumping on average chlorinity is The average growth rate of the annual water year (90% water frequency) reached 3.3 times.

【作者单位】：中山大学水资源与环境研究中心;华南地区水循环和水安全广东普通高校重点实验室;中山市火炬高技术产业开发区水利所;
【基金】：国家自然科学基金项目(51509127,51210013,41301627)
【分类号】：P731.23;TU991
【正文快照】： 3.中山市火炬高技术产业开发区水利所,广东中山528437)河口位于海洋和河流的交接地带,受海洋动力和河流动力的双重影响,其区域通常交通便利,是人类生活、生产和贸易活动频繁的场所[1]。而咸潮上溯对于河口生态系统和河口地区的正常取水都会带来较大的影响。影响咸潮上溯的因素

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