Analysis of historical floods on the Yangtze River, China: Characteristics and explanations

Yu, Fang; Chen, Zhongyuan; Ren, Xin; Yang, Guifang

doi:10.1016/j.geomorph.2009.03.008

Cited by 127 publications

(77 citation statements)

References 16 publications

(16 reference statements)

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“…1). In July 2010, the discharge from the Changjiang River reached 60 527 m 3 s −1 , which was significantly higher than in the non-flooding year of 2009 (Gong et al, 2011;Yu et al, 2009). Water samples were collected using Teflon-coated Go-Flo bottles (20 L; General Oceanics Inc., Miami, FL, USA) mounted on a General Oceanics Rosette ® assembly (model 1015; General Oceanics Inc.).…”

Section: Study Area and Sampling Protocolmentioning

confidence: 99%

“…A respiration quotient of 1 was assumed in order to convert the respiration from oxygen units to carbon units (Hopkinson, 1985;Parsons et al, 1984). Gong et al, 2011;Yu et al, 2009). During the flood, a tremendous quantity of freshwater was delivered into the ECS, and the low salinity of the sea surface (SSS ≤ 31) covered almost two-thirds of the continental shelf (Fig.…”

Section: Biological Variablesmentioning

confidence: 99%

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The influence of episodic flooding on a pelagic ecosystem in the East China Sea

et al. 2017

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Abstract. This study was designed to determine the effects of flooding on a pelagic ecosystem in the East China Sea (ECS) with a focus on plankton activity and plankton community respiration (CR). In July 2010, a flood occurred in the Changjiang River. As a comparison, a variety of abiotic and biotic parameters were monitored during this flooding event and during a non-flooding period (July 2009). During the flood, the Changjiang diluted water (CDW) zone covered almost two-thirds of the ECS, which was approximately 6 times the area covered during the non-flooding period. The mean nitrate concentration was 3-fold higher during the 2010 flood (6.2 vs. 2.0 µM in 2009). CR was also higher in the 2010 flood: 105.6 mg C m −3 d −1 vs. only 73.2 mg C m −3 d −1 in 2009. The higher CR in 2010 could be attributed to phytoplankton respiration, especially at stations in the CDW zone that were not previously characterized by low sea surface salinity in 2009. In addition, zooplankton (> 330 µm) were another important component contributing to the high CR rate observed during the 2010 flood; this was a period also associated with a significant degree of f CO 2 drawdown. These results collectively suggest that the 2010 flood had a significant effect on the carbon balance in the ECS. This effect might become more pronounced in the future, as extreme rainfall and flooding events are predicted to increase in both frequency and magnitude due to climate change.

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Section: Study Area and Sampling Protocolmentioning

confidence: 99%

Section: Biological Variablesmentioning

confidence: 99%

The influence of episodic flooding on a pelagic ecosystem in the East China Sea

et al. 2017

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“…In China, floods and droughts are also the most frequently occurring natural disaster, because of the strong influence of the East Asian monsoon [6,7]. Two thirds of the Chinese territory and over half of the total population are affected by a variety of flood or/and drought events almost every year [1,8].…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Characteristics of Dry-Wet Abrupt Transition Based on Precipitation in Poyang Lake Basin, China

2015

Water

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Abstract:The dry-wet abrupt transition (DWAT) is a typical anomaly of precipitation at the subseasonal scale and may result in a severer and greater hydro-meteorological hazard. This paper identified and examined the DWAT events in terms of precipitation in Poyang Lake basin, including both from dry to wet (DTW) and from wet to dry (WTD), during the period of 1960-2010 and analyzed its characteristics of temporal and spatial distribution and intra-and inter-annual tendencies based on the Mann-Kendall (M-K) test. The results revealed that the DTW was inclined to occur in March, but WTD in July and September; the inter-annual variation of the DWAT index showed a feeble long-term increasing trend in July and a decreasing trend in September with a Z-statistic of 1.81 and −1.44, respectively, although none of these trends achieved the statistical significance level (α = 0.05); the north parts of Poyang Lake basin experienced more DWAT events during the last 50 years in which the occurrence of WTD is more frequent than that of DTW. The outcomes of the study will help mitigate and regulate the flood and drought in Poyang Lake basin, as well as in other regions.

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“…China is commonly affected by a variety of flood events because of its vast territory and the strong influence of the East Asian monsoon (Renyi and Nan 2002;Yu et al 2009). Floods hit southern China nearly every year because of the abundant monsoon rainfall.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal changes in flooding and the affecting factors in China

Nie

Yang

et al. 2011

Nat Hazards

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Spatial and temporal changes in flood events in China are becoming increasingly important due to the rapid climate warming that is occurring. This study was conducted to consider changes in flood events and the factors affecting such changes. To accomplish this, China was divided into natural and social-economic flood regions: north China, northwest China, northeast China, southwest China, central China, east China, south China, and Taiwan, Hong Kong and Macau. Spatial and temporal changes in flood patterns were rebuilt during 1980-2009, and Fast Fourier Transform Filtering was then employed to stimulate the changes in floods during this period. The factors affecting flooding were then analyzed quantitatively. The results showed that, based on the time series for China as a whole, flooding was more serious during 1990-1999 than 1980-1989 and 2000-2009. However, in different regions, the trends in flooding differed greatly. Based on spatial changes, the areas hardest hit by floods were northeast China in the 1980s, northeast China, central China and east China in the 1990s, and central China after 2000. In China, the main flood-affecting factors were meteorological, ecological, population, water conservation facilities, and policy factors. However, the main affecting factors differed by region. Overall, the complex spatial and temporal features of flood variations and various affecting factors demand proper national and regional governmental action in the face of the changing flood patterns in China. The results of the present study provide valuable information to flood policymakers and flood disaster researchers.

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Analysis of historical floods on the Yangtze River, China: Characteristics and explanations

Cited by 127 publications

References 16 publications

The influence of episodic flooding on a pelagic ecosystem in the East China Sea

The influence of episodic flooding on a pelagic ecosystem in the East China Sea

Spatiotemporal Characteristics of Dry-Wet Abrupt Transition Based on Precipitation in Poyang Lake Basin, China

Spatial and temporal changes in flooding and the affecting factors in China

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