Flood hydrograph coincidence analysis of the upper Yangtze River and Dongting Lake, China

Chao, Zhang; Ji, Changming; Wang, Yi; Xiao, Qian

doi:10.1007/s11069-021-04993-2

Cited by 4 publications

(3 citation statements)

References 41 publications

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“…During the 2020 flood, higher lake base stage and coincidence of high Changjiang and tributary discharge contributed to some Changjiang stations reaching near their historic highs. Altered timing of peak TGD discharge during severe floods so that maximum Changjiang stage and lake discharge no longer coincide could effectively mitigate flood intensity (Li et al, 2017;Zhang et al, 2022).…”

Section: River-lake Interactionmentioning

confidence: 99%

Severe flood probability on the middle Changjiang (Yangtze River) after completion of the Three Gorges Dam

Shankman

Lai

2022

Front. Earth Sci.

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A major justification for building the Three Gorges Dam on the Changjiang is flood control. The dam can reduce peak discharge during severe floods. These floods, however, cannot be prevented by operation of the Three Gorges Dam alone. During the most severe floods abnormally high rainfall occurs throughout the Changjiang basin. The Three Gorges Dam can only affect discharge from the upper basin. Large tributaries on the middle Changjiang are unaffected by the dam. The cumulative impact of high discharge from large tributaries on the middle Changjiang increase flood severity with distance downstream. Also, Changjiang-lake interaction is affected by decreasing volume of Poyang and Dongting Lakes that occurred during the past few decades. These are the largest freshwater lakes in China. As a result of reduced floodwater storage capacity during summer high discharge periods, tributaries flow into the lakes with a higher base level than previously occurred. Instead of Changjiang back flowing into the lakes as previously expected during major floods, high Changjiang discharge occurs at the same time as high tributary discharge that increases peak river stage.

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Section: River-lake Interactionmentioning

confidence: 99%

Severe flood probability on the middle Changjiang (Yangtze River) after completion of the Three Gorges Dam

Shankman

Lai

2022

Front. Earth Sci.

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“…However, the hydrological regimes in many lakes have changed significantly with climate change and human activities in recent years [1][2][3][4]. The disasters in these lake areas are becoming increasingly severe in two extreme directions: flooding during the flood season and drought during the dry season [4][5][6][7]. The hydrological situation at the confluence section of lakes and rivers is complex, and it is influenced by both the lakes and rivers.…”

Section: Introductionmentioning

confidence: 99%

Study on the Water Level–Discharge Relationship Changes in Dongting Lake Outlet Section over 70 Years and the Impact of Yangtze River Backwater Effect

Liu

Jiang

Long

et al. 2023

Water

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The hydrological characteristics of the river–lake connecting section are determined by their interaction and studying them can help to understand the changing relationship between these two water bodies over time. The Lujiao–Luosan section is the connecting section of Dongting Lake and the Yangtze River, and the hydrological data for this section over the past 70 years has been analyzed. It has been found that the lowest water level is consistently rising at the same discharge at Chenglingji station, which is the joint point of Dongting Lake and the Yangtze River. While this could alleviate the drought situation in the Dongting Lake area during dry seasons, it could pose a more significant flood-control challenge during high water levels in the flood season. The water surface slope shows a decreasing trend especially during the dry season, except for the high flood period (July–September), which indicates that the water slope in the connecting section of Dongting Lake has become flatter. The backwater effect of the Yangtze River on Dongting Lake becomes increasingly stronger as the water surface slope difference between the Chenglingji–Luoshan section and the Lujiao–Chenglingji section changes from negative to positive between January and April.

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“…For instance, the inter-annual and seasonal fluctuation in the water area and water level of certain large lakes in the YHRB have been estimated using middle and high-resolution satellite image and altimetry satellite data. These lakes are mainly targeted in the top largest lakes, such as Poyang Lake (Song and Ke, 2014;Mei et al, 2015;Zeng et al, 2017;Wang et al, 2019b;Mu et al, 2020), Dongting Lake (Huang et al, 2011;Hu et al, 2015;Xing et al, 2018;Long et al, 2019;Wang et al, 2021a), Taihu Lake (Hu and Wang, 2009;Zhao et al, 2012;Wang et al, 2019c;Xu et al, 2020b), Hongze Lake (Yin et al, 2013;Cai et al, 2020;Mei et al, 2021) and Chaohu Lake (Chen et al, 2013;Lin et al, 2021), which have a significant impact on the surrounding ecological environment. At present, research related to water storage mostly exists in Poyang Lake (the largest freshwater lake in China) (Liu H. et al, 2020;Xu et al, 2020a;Song et al, 2021), while the estimate on seasonal water storage changes of other lakes in the YHRB still remains poorly quantified.…”

Section: Introductionmentioning

confidence: 99%

Seasonal Amplitude of Water Storage Variations of the Yangtze–Huai Plain Lake Group: Implicaion for Floodwater Storage Capacity

Song

Zhan

et al. 2022

Front. Environ. Sci.

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Lakes are of significant importance in regulating floods and providing water sources. The seasonal water storage variations for the plain lake group in the Yangtze–Huai River Basin (YHRB) are significant for alleviating flood pressure and regulating runoff. However, to date, the seasonal amplitude of lake water storage variations and its capacity of buffering floodwater in the YHRB is not quantified well and remains to be investigated comprehensively. To advance the understanding of such a critical scientific issue, the water level data of the plain lake group (area>100 km2, 29 lakes) in the YHRB is collected from multi-source data between 1990 and 2020. Using lake inundation area obtained from Global Surface Water and water level variations, water storage dynamics for the plain lake group are quantified. Furthermore, this study also uses the Gravity Recovery and Climate Experiment (GRACE) products to analyze the terrestrial water storage anomalies (TWSA) in the whole basin. The results indicate that the seasonal amplitude of water level change and water storage variation of the plain lake group are 2.80 ± 0.71 m and 37.38 ± 14.19 Gt, respectively. Poyang and Dongting Lakes, two lakes that maintain the natural connection with the Yangtze River, have the most substantial seasonal amplitude in the hydrological situation. The amplitude in water level and water storage in Poyang Lake is 9.53 ± 2.02 m and 14.13 ± 5.54 Gt respectively, and that in Dongting Lake is 7.39 ± 1.29 m and 7.31 ± 3.42 Gt respectively. The contribution of seasonal variation of water storage for large plain lakes to TWSA in the YHRB is approximately 33.25%, fully reflecting these lake’s imperative position in the YHRB. This study is expected to enhance the scientific understanding of the seasonal hydrologic regime for the large lakes in the YHRB and contribute to the management of flood risks and water resources in East China.

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Flood hydrograph coincidence analysis of the upper Yangtze River and Dongting Lake, China

Cited by 4 publications

References 41 publications

Severe flood probability on the middle Changjiang (Yangtze River) after completion of the Three Gorges Dam

Severe flood probability on the middle Changjiang (Yangtze River) after completion of the Three Gorges Dam

Study on the Water Level–Discharge Relationship Changes in Dongting Lake Outlet Section over 70 Years and the Impact of Yangtze River Backwater Effect

Seasonal Amplitude of Water Storage Variations of the Yangtze–Huai Plain Lake Group: Implicaion for Floodwater Storage Capacity

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