Predicting the Hydrological Impacts of the Poyang Lake Project Using an EFDC Model

Wang, Peng; Lai, Geying; Li, Lin

doi:10.1061/(asce)he.1943-5584.0001240

Cited by 55 publications

(21 citation statements)

References 34 publications

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“…In 2013 and 2014, sampling sites 0 and 16-23 were added to monitor the state of inflows and outflow. In addition, benthic macroinvertebrate samples were collected quarterly at 15 sampling sites (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15) importance of the lake in ecological conservation. Unfortunately, the hydrological characteristics of the lake have changed during the past decade, and the duration of extreme low or high water events have increased, thereby affecting wetland landscapes [10], water quality [2,11], and aquatic habitats [12][13][14].…”

Section: Study Areamentioning

confidence: 99%

“…Therefore, an update of the lake's ecosystem health assessment is needed. Especially, the building of the Lake Poyang Hydraulic Project (LPHP) that has been proposed recently might cause considerable changes in hydrodynamic conditions, water quality, and aquatic species [4,5]. Therefore, this assessment can act as a reference baseline to quantitatively analyze the impact of the LPHP.…”

Section: Introductionmentioning

confidence: 99%

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Assessing Aquatic Ecological Health for Lake Poyang, China: Part II Index Application

Huang

Gao

et al. 2018

Water

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As one of the largest Yangtze river-connected lakes in China, Lake Poyang's heath status has increasingly become a cause for concern. This study evaluated Lake Poyang's heath status using a newly developed index (ecosystem health index for Lake Poyang, LP-EHI). The evaluation results revealed a declining tendency in the lake's health status from 2010 to 2014. The health conditions for Lake Poyang were "good", "fair", and "fair" in 2010, 2013, and 2014, respectively. The individual indices for water quality, nutrient conditions, and benthic macroinvertebrate showed a deteriorating trend from 2010 to 2014 mainly due to human activities, such as industrial pollution. Further analysis revealed that the health status of Lake Poyang was strongly affected by hydrological processes. This study demonstrated the potential of LP-EHI in evaluating the ecological health of Lake Poyang. Such a heath status evaluation can be applied to other lakes, and can benefit lake management, restoration, and conservation.

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Section: Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessing Aquatic Ecological Health for Lake Poyang, China: Part II Index Application

Huang

Gao

et al. 2018

Water

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“…Several forms of satellite remote sensing exist (e.g., Synthetic Aperture Radar (SAR) [28], Moderate Resolution Imaging Spectroradiometer (MODIS) [29], etc.). Numerical simulations are efficient and economical tools that generate enough simulated area data of high spatial and temporal frequency [30,31]. In this study, a two-dimensional Environmental Fluid Dynamics Code (EFDC) model is used while accounting for the need for area data of a high temporal resolution.…”

Section: Et Al Adopted Moderate Resolutionmentioning

confidence: 99%

“…The lake is shaped like a calabash, and it is divided from a geographical perspective into northern and southern sections by the Songmen Mountains (Figure 1). The northern section includes a long and narrow water channel, with a narrowest width of 2.8 km, that connects the Yangtze River at the Hukou station, and the southern portion includes an extensive lake district, with a widest width of 74.0 km, linking to upstream rivers [30]. The geomorphology of the lake includes a water channel, bottomland area, island, inner lake, and bay.…”

Section: Study Areamentioning

confidence: 99%

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Characteristics and Factors Influencing the Hysteresis of Water Area–Stage Curves for Poyang Lake

Huang

Peng

Liu

et al. 2017

Water

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Flood dynamics of large lake floodplain systems are typically complex. This paper analyses the characteristics and factors that influence the hysteresis of water area-stage curves for Poyang Lake, the largest freshwater lake in China characterized by complex geomorphology and upstream-downstream exchange conditions. For this purpose, a two-dimensional hydrodynamic model (EFDC) based on seven scenarios is established. The results indicate that the area-stage curve presents significant hysteretic characteristics due to different water surface gradients that emerge during the water-rising and water-falling periods. Counter-clockwise, clockwise, and splayed hysteresis directions observed at the northern, southern, and central hydrometric stations, respectively, are found in Poyang Lake for the first time. Upstream catchment inflows and Hukou stage reflecting the downstream condition are the main factors that influence hysteresis. The temporal fluctuation of catchment inflows and Hukou stage has a remarkably positive impact on hysteresis, namely, an increase in fluctuation brings about a larger hysteresis. The effects of magnitude change in the two factors on hysteresis are opposing. Catchment inflows are positively related, while the decline of the Hukou stage will produce a more pronounced hysteresis. The outcomes of this study will benefit the water management of Poyang Lake and other similar large lakes.

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New insights on the surface hydrological connectivity of water depth thresholds in a flood-pulse-influenced floodplain system (Poyang Lake, China)

Zhang

Liu

et al. 2020

Stoch Environ Res Risk Assess

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Knowledge of hydrological connectivity and its threshold behaviors plays an important role in sustaining and managing floodplains; however, threshold behaviors at a system scale have not received adequate attention. This study used a geostatistical connectivity method in combination with hydrodynamic modeling experiments to provide new insights on the surface hydrological connectivity of water depth thresholds in a flood-pulse-influenced floodplain system (Poyang Lake, China). The results reveal that hydrological connectivity is more sensitive to changes in water depth during dry, rising, and receding water phases than in the flooding phase under different depth thresholds. Geographically, the connectivity patterns show that large water bodies are mainly distributed in the main lake and floodplain river channels; extensive floodplain areas are dynamically connected to the main lake, indicating that the lake's floodplain is a sensitive area of the flood pulse system. From a systemic perspective, the surface water connectivity exhibits abrupt changes under the depth threshold of around 50 cm, demonstrating a rapid system response to the threshold value. In the floodplains of Poyang Lake, surface topography and flood pulse dynamics play a combined role in affecting hydrological connectivity, especially low and intermediate connectivity. The filling-spilling process generally extends from the lower-lying main lake and floodplain rivers to the upper-lying floodplains of the lake. The current work quantifies the influences of depth thresholds on surface hydrological connectivity to pave the way for performing a joint assessment of hydrological connectivity and ecological responses based on developing comprehensive modellings in threshold-affected floodplains.

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Predicting the Hydrological Impacts of the Poyang Lake Project Using an EFDC Model

Cited by 55 publications

References 34 publications

Assessing Aquatic Ecological Health for Lake Poyang, China: Part II Index Application

Assessing Aquatic Ecological Health for Lake Poyang, China: Part II Index Application

Characteristics and Factors Influencing the Hysteresis of Water Area–Stage Curves for Poyang Lake

New insights on the surface hydrological connectivity of water depth thresholds in a flood-pulse-influenced floodplain system (Poyang Lake, China)

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