Investigation of changes in the annual maximum flood in the Yellow River basin, China

Bai, Peng; Liu, Xiaomang; Liang, Kang; Liu, Changming

doi:10.1016/j.quaint.2015.04.053

Cited by 44 publications

(23 citation statements)

References 66 publications

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“…There are only 69 stations (accounting for approximately 6% of the total stations) with significant linear trends ( Figure 5a). For those stations with significant linear trends, 62 7 the Yellow river is most likely due to the implementation of soil conservation practices in its tributary regions (e.g., Bai et al, 2016). There are few stations in southern China that show significant linear trends either before or after change points.…”

Section: Association Of Flood Peaks With Tropical Cyclonesmentioning

confidence: 99%

On the Flood Peak Distributions over China

Yang¹,

Wang²,

Li³

et al. 2019

Preprint

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Abstract. Time series of annual maximum instantaneous peak discharge from 1120 stations with record lengths of at least 50 years are used to examine flood peak distributions across China. Abrupt change rather than slowly varying trend is the dominant mode of the violation of stationary assumption for annual flood peaks over China. The dominance of decreasing trends in annual flood peak series indicates a weakening tendency of flood hazard over China in recent decades. Delayed (advanced) occurrence of annual flood peaks in southern (northern) China point to a tendency for seasonal clustering of floods across the entire country. We model the upper tails of flood peaks based on the Generalized Extreme Value (GEV) distributions for the stationary series, and evaluate the scale-dependent properties of flood peaks. The relations of GEV parameters and drainage area show spatial contrasts between northern and southern China. Weak dependence of the GEV shape parameter on drainage area highlights the critical role of space-time rainfall organizations in dictating the upper tails of flood peaks. Landfalling tropical cyclones play an important role in characterizing the upper-tail properties of flood peak distributions especially in northern China and southeastern coast, while the upper tails of flood peaks are dominated by extreme monsoon rainfall in southern China. Severe flood hazards associated with landfalling tropical cyclones are characterized with tropical cyclones experiencing extratropical transition, and persistent moisture transport/interactions with regional topography as demonstrated by Typhoon Nina (1975).

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Section: Association Of Flood Peaks With Tropical Cyclonesmentioning

confidence: 99%

On the Flood Peak Distributions over China

Yang¹,

Wang²,

Li³

et al. 2019

Preprint

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“…The Loess Plateau contributes nearly 90% of the total Yellow River sediment runoff, whereas most of the sediment runoff is produced in the coarse sandy hilly catchments of the middle Yellow River (Gao et al, ). Meanwhile, the middle Yellow River region is also one of the main sources of floods (Bai, Liu, Liang, & Liu, ; Li et al, ). Consequently, the reservoirs and large‐scale soil and water conservation (SWC) projects built in the middle Yellow River region should be the key measures for streamflow and sediment regulation, such as the warping dam system.…”

Section: Introductionmentioning

confidence: 99%

Changes in streamflow and sediment for a planned large reservoir in the middle Yellow River

Liang

Bao

et al. 2019

Land Degrad Dev

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Changes in streamflow and sediment runoffs would affect the reservoir's functional operation and the construction of soil and water conservation measures in China's Loess Plateau. In this study, the long‐term changes in streamflow and sediment were analyzed for a main stem section of the middle Yellow River where the to‐be‐built large Guxian Reservoir is to be located. Results showed that both streamflow and sediment had significant downward trends with the rates of −9.4 m3 s−1 yr−1 and −16.8 million t yr−1, respectively, during the period of 1961–2017. Using the range of variability approach, the change of streamflow regime in its postimpact period (1986–2017) was subjected to the moderate alteration, whereas the alteration of sediment regime was moderate and severe for the first (1980–1996) and second (1997–2017) postimpact periods. As an example, the attribution analyses of annual streamflow and sediment changes were conducted in a typical tributary catchment (Qingjian River) on the right bank of Guxian Reservoir. For the periods of 1980–2002 and 2003–2016, climate variability occupied the primary and secondary proportions to both streamflow and sediment reductions, respectively. Overall, human activities demonstrated the underlying contribution to the sharp declines of streamflow and sediment, accounting for 68% and 74%, respectively, during the period of 1980–2016. We suggest that, based on the operational life of warping dams (built on gully for mitigating gully erosion by raising the gully‐bed step‐by‐step), there are risks of flash flood and high sediment concentration events in the future because the streamflow/sediment‐reducing infrastructures may be damaged by extreme rainstorms and in turn become the flood and sediment amplifiers.

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“…Meanwhile, the runoff generation potential may be improved due to the deforestation in the last decades (Khaleghi, 2017). On the other hand, the increasing energy demands calls for more hydropower projects, which can reduce flood water during flood seasons (Bai et al, 2016). And the soil conservation implementation under the guidance of the Chinese government in recent years may reduce the peak flow in summer (Liu et al, 2019b).…”

Section: Deficienciesmentioning

confidence: 99%

Spatiotemporal analysis of flash flooding events in mountainous area of China during 1950–2015

Wang

Cheng

Zhao

et al. 2019

Preprint

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Abstract. Flash flooding is one of the most destructive natural disasters that occur in mountainous areas. Understanding the spatiotemporal characteristics of flash flooding across China is important for enabling better disaster estimation and prevention on the national scale. To bridge the gap in the research of the spatiotemporal characteristics of flash flooding events (FFEs), based on the longest time series of FFEs in China, this paper used Mann-Kendall (MK) test, wavelet analysis, monthly frequency and index of dispersion (D) to detect the temporal variation, temporal periodic and temporal clustering of FFEs in China. The results indicated that: (1) A marked rising in the number of FFEs in China was detected, with a growth rate of 23.62 per year since 1950; (2) On the large scale, the main periodicity characteristics was approximately 12–25 a, with three oscillation periods, and tended to be stable since 1980; On the small scale, the 2–8 a time scale was prominent, with two oscillation periods, and tended to be stable since 2006; (3) The intra-annual frequency distribution of FFEs can be divided into three types, right-skew, left-skew and symmetry; (4) The inter-annual clustering played the dominant role in FFEs occurrence across China, while the under-dispersions were only detected in six (5 %) watersheds. Precipitation anomalies and soil moisture were detected to have a close correlation with FFEs, however, the interplay of climatic variations and anthropogenic activities may impose greatly impacts on the occurrence and evolution of the flash flooding disasters on a large extent. This study provided a preliminary reference for revealing the driving factors of flash flooding disasters in the context of climate change.

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Investigation of changes in the annual maximum flood in the Yellow River basin, China

Cited by 44 publications

References 66 publications

On the Flood Peak Distributions over China

On the Flood Peak Distributions over China

Changes in streamflow and sediment for a planned large reservoir in the middle Yellow River

Spatiotemporal analysis of flash flooding events in mountainous area of China during 1950–2015

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