Characteristics and causal factors of hysteresis in the hydrodynamics of a large floodplain system: Poyang Lake (China)
Characteristics and causal factors of hysteresis in the hydrodynamics of a large floodplain system: Poyang Lake (China)
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大型漫滩系统水动力滞后特征及成因：鄱阳湖（中国）
DOI：
10.1016/j.jhydrol.2017.08.027
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发表时间：
2017-10
影响因子：
6.4
通讯作者：
Tan Z. Q.
中科院分区：
文献类型：
--
作者：
Zhang X. L.;Zhang Q.;Werner A. D.;Tan Z. Q.
前人(中国)对鄱阳湖漫滩系统的模拟研究揭示了水位、库容和表面积之间复杂的滞回关系。然而，只提出了假设的因果因素，顺时针和逆时针滞后函数的出现原因尚不清楚。目前的研究旨在通过进一步探索鄱阳湖的滞回行为来解决这一问题，包括考虑水位-流量关系。利用遥感影像对水动力模拟所产生的水面面积进行验证。用这两种方法得到的阶段面积关系非常一致。新的结果揭示了阶段-水流关系中的三相水文状况，这有助于改进对湖泊-泛滥平原系统滞后阶段-面积关系的物理解释。对于水位-面积关系，顺时针方向的滞后是典型的泛滥平原滞后过程的结果(例如，退潮期间泛滥平原的限制排水)，而逆时针滞后源于河流滞后效应(即由回水效应引起)。流域来水高峰与长江泄流高峰之间的时间滞后(即所谓的长江堵塞效应)，加剧了河流滞后效应。时间滞后还导致了长江流量与湖水水位关系的顺时针滞后。因此，导致其他河流、湖泊和泛滥平原滞回的因素在鄱阳湖内共同作用，造成了水文滞回的空间变异性。这些影响在不同的时间、不同的湖泊部位、不同的水位波动阶段起主导作用，造就了鄱阳湖独特的滞后性水文行为。
A previous modeling study of the lake-floodplain system of Poyang Lake (China) revealed complex hysteretic relationships between stage, storage volume and surface area. However, only hypothetical causal factors were presented, and the reasons for the occurrence of both clockwise and counterclockwise hysteretic functions were unclear. The current study aims to address this by exploring further Poyang Lake’s hysteretic behavior, including consideration of stage-flow relationships. Remotely sensed imagery is used to validate the water surface areas produced by hydrodynamic modeling. Stage-area relationships obtained using the two methods are in strong agreement. The new results reveal a three-phase hydrological regime in stage-flow relationships, which assists in developing improved physical interpretation of hysteretic stage-area relationships for the lake-floodplain system. For stage-area relationships, clockwise hysteresis is the result of classic floodplain hysteretic processes (e.g., restricted drainage of the floodplain during recession), whereas counterclockwise hysteresis derives from the river hysteresis effect (i.e., caused by backwater effects). The river hysteresis effect is enhanced by the time lag between the peaks of catchment inflow and Yangtze discharge (i.e., the so-called Yangtze River blocking effect). The time lag also leads to clockwise hysteresis in the relationship between Yangtze River discharge and lake stage. Thus, factors leading to hysteresis in other rivers, lakes and floodplains act in combination within Poyang Lake to create spatial variability in hydrological hysteresis. These effects dominate at different times, in different parts of the lake, and during different phases of the lake’s water level fluctuations, creating the unique hysteretic hydrological behavior of Poyang Lake.
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影响因子：
3.3
作者：
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通讯作者：
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DOI：
10.1002/esp.3760050308
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影响因子：
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DOI：
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期刊：
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影响因子：
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作者：
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通讯作者：
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影响因子：
4.3
作者：
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