Examining the influence of river–lake interaction on the drought and water resources in the Poyang Lake basin

Zhang, Zengxin; Chen, Xi; Xu, Chong‐Yu; Hong, Yang; Hardy, Jill; Sun, Zhonghua

doi:10.1016/j.jhydrol.2015.01.008

Cited by 180 publications

(90 citation statements)

References 34 publications

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“…When the TGD was near completion in 2000, the intent was to trap a massive amount of water and sediment that would otherwise flow into the lower Yangtze River [29,59]. As shown in the Yangtze River Sediment bulletins (http://www.cjh.com.cn/pages/nsgb.html/), the water level declined significantly from 2000, directly affecting Dongting Lake and Poyang Lake [24,60,61], and creating a more variable lake boundary and water depth in Dongting Lake as a whole, especially in the shallow areas of SDL and EDL. Water level may affect water depth, which might in turn affect the resuspension of sediment; it might also affect the lake area, which would affect the resuspension of sediment through wave formation and intensity.…”

Section: Factors Affecting the Spatial And Temporal Changes In Tsmmentioning

confidence: 99%

Landsat-Based Long-Term Monitoring of Total Suspended Matter Concentration Pattern Change in the Wet Season for Dongting Lake, China

et al. 2015

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Assessing the impacts of environmental change and anthropogenic activities on the historical and current total suspended matter (TSM) pattern in Dongting Lake, China, is a large challenge. We addressed this challenge by using more than three decades of Landsat data. Based on in situ measurements, we developed an algorithm based on the near-infrared (NIR) band to estimate TSM in Dongting Lake. The algorithm was applied to Landsat images to derive TSM distribution maps from 1978 to 2013 in the wet season, revealing significant inter-annual and spatial variability. The relationship of TSM to water level, precipitation, and wind speed was analyzed, and we found that: (1) sand mining areas usually coincide with regions that have high TSM levels in Dongting Lake; (2) water level and seven-day precipitation were both important to TSM variation, but no significant relationship was found between TSM and wind speed or other meteorological data; (3) the increased level of sand mining in response to rapid economic growth has deeply influenced the TSM pattern since 2000 due to the resuspension of sediment; and (4) TSM variation might OPEN ACCESSRemote Sens. 2015, 7 13976 be associated with policy changes regarding the management of sand mining; it might also be affected by lower water levels caused by the impoundment of the Three Gorges Dam since 2000.

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Section: Factors Affecting the Spatial And Temporal Changes In Tsmmentioning

confidence: 99%

Landsat-Based Long-Term Monitoring of Total Suspended Matter Concentration Pattern Change in the Wet Season for Dongting Lake, China

et al. 2015

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“…However, under the dual pressure of global climate change and the impoundment of the Three Gorges Reservoir, the water mass exchange between Poyang Lake and the Yangtze River has been altered, thereby affecting the WLFs of the lake [10,11]. The more frequent occurrence of low water levels and the earlier decline in winter water level and the longer river-phase period of Poyang Lake have greatly affected its ecological functions [12,13]. Previous studies have shown that the water quality of Poyang Lake is steadily deteriorating [14].…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Variability in the Water Quality of Poyang Lake and Its Associated Responses to Hydrological Conditions

Gao

Zhang

et al. 2016

Water

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Abstract:Determining the spatiotemporal water quality patterns and their corresponding driving factors is crucial for lake water quality managements. This study analyzed hydrological data and concentrations of 11 water quality parameters, including total nitrogen, total phosphorus, ammonia nitrogen and chlorophyll-a (Chl-a), for water samples collected from 15 sampling sites between 2009 and 2014. The water quality of sites in the northern Poyang Lake-Yangtze River waterway was influenced by different environmental parameters compared to sites in central lake, especially for Chl-a concentration. All pollutant parameters were significantly higher in the river phase (water level <14 m) than in the lake phase (water level >14 m) (p < 0.05). These results were confirmed via principal component analysis, which identified three principal components that explained over 79% of the dataset variance. Among all the parameters related to climatic factors, eutrophication and organic pollution were the most important contributors in water quality. Dilution was the controlling factor that drove the seasonal variability in the water quality of the Poyang Lake, China. This work further indicated that regulating pollutant effluents in tributaries and water level within the lake could improve the water quality in Poyang Lake, which may give some impetus for water quality management.

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“…Poyang Lake is one of two biggest lakes still linked with the Yangtze, which is not only the natural storing of the Yangtze River flood and an important wetland of the world, but also a significant region of biodiversity for the Yangtze [3][4]. The TGP operation has changed the temporal distribution of the incoming water from the upper reaches of the Yangtze [5][6] and caused the change of water regime of Poyang [7][8][9], which will further lead to changes in water ecological environment. As a result, the development of water resources, conservation of wetland ecology, and biological diversity in Poyang will be directly affected, and even sustainable use of water and protection of the Yangtze environment may be involved [10].…”

Section: Introductionmentioning

confidence: 99%

Effects of the Three Gorges Project on the Environment of Poyang Lake

Li¹,

Lai²,

Dong³

et al. 2016

Pol. J. Environ. Stud.

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Impounding by the Three Gorges Project (TGP) changed the hydrological process and affected the ecosystem in the middle and lower reaches of the Yangtze River. Poyang Lake is closely linked with the Yangtze River. This paper presents a coupled numerical model designed for simulating the tempo-spatial variation of water quantity and quality in the lake's water system that features complex river-lake interactions. According to the calculated results of a typical year (2000) under two scenario schemes, we evaluated TGP's effects on the ecological environment of the lake. The results show that due to TGP impoundment, the hydraulic gradient at the lake outlet has increased and that the outflow fluctuates dynamically and regularly with the increase and decrease of the TGP released discharge. The lake water level falls in advance and the average reduction magnitude of the water level decreases progressively from north to south, showing a spatially uneven effect, which is 0.95 m, 0.70 m, 0.74 m, 0.35 m, and 0.80 m at Xingzi, Tangyin, Duchang, Kangshan, and Wucheng stations, respectively. The ammonia nitrogen output from the lake to the Yangtze River increases and the total ammonia nitrogen amount within the lake region decreases. The average ammonia nitrogen concentration within the lake region tends to increase slightly and the influence magnitude on the concentration is reduced from north to south. The wetland vegetation area fluctuates dynamically with the decline of the water level, and the increase of the wetland vegetation area ranges from 0.64 to 215.48 km 2 . As a result of the falling water levels, the bottomlands in the lake region are exposed relatively earlier and the continuous exposure days increase, which intensifies the problem that migrant birds do not have enough food. Meanwhile the number of days when the bottomland and wetland are submerged decrease, which will further accelerate the degradation succession of wetland vegetation.

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Examining the influence of river–lake interaction on the drought and water resources in the Poyang Lake basin

Cited by 180 publications

References 34 publications

Landsat-Based Long-Term Monitoring of Total Suspended Matter Concentration Pattern Change in the Wet Season for Dongting Lake, China

Landsat-Based Long-Term Monitoring of Total Suspended Matter Concentration Pattern Change in the Wet Season for Dongting Lake, China

Spatiotemporal Variability in the Water Quality of Poyang Lake and Its Associated Responses to Hydrological Conditions

Effects of the Three Gorges Project on the Environment of Poyang Lake

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