三峡工程蓄水后宜昌站水流特性变化及测验措施

发布时间：2018-03-16 13:38

本文选题：三峡工程　切入点：蓄水　出处：《长江科学院院报》2017年05期 　论文类型：期刊论文

【摘要】：为了探究三峡工程蓄水后水文站水流特性,以宜昌站为例,利用蓄水后多年实测资料,分析宜昌站水位特性和洪水特性。结果表明:水位波动性增强,同流量级下水位降低,历年最高水位下降、最低水位抬高,中低水位持续时间增长;中低水位流量呈现日周期变化,年最小流量有增大趋势,并逐渐稳定在6 000 m~3/s左右,年最大流量因三峡水库调蓄得到控制,峰顶持续时间变长,年内水量变化为枯期增加、汛期减少,中低水位-流量关系呈多条单一线变化趋势。因此,根据现有水流特性变化,需调整水位和流量资料收集方式,以满足整编需要。
[Abstract]:In order to investigate the water flow characteristics of the hydrologic station after water storage in the three Gorges Project, taking Yichang Station as an example, the characteristics of water level and flood in Yichang Station are analyzed by using the measured data for many years after storage. The results show that the fluctuation of water level is increased and the water level under the same discharge level is decreased. The highest water level has declined, the lowest water level has been raised, and the medium and low water level has increased in duration. The medium and low water level discharge shows a daily cycle change, and the annual minimum discharge tends to increase, and gradually stabilizes at about 6 000 mm3 / s. The maximum annual discharge is controlled by the regulation and storage of the three Gorges Reservoir, the peak duration becomes longer, the annual water volume increases during the dry period, the flood season decreases, and the relationship between middle and low water level and discharge presents a single line variation trend. Water level and discharge data collection methods need to be adjusted to meet the needs of integration.
【作者单位】：长江水利委员会长江三峡水文水资源勘测局;三峡大学水利与环境学院;
【分类号】：P332;P333

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