Temporal variation of over‐bank flooding of Wei River and its impact on a riparian wetland in Xi'an, China

Tian, Senlin; Luo, Weihong; Jia, Zhang; Butalia, Rajpreet Singh

doi:10.1002/hyp.7591

Cited by 3 publications

(1 citation statement)

References 50 publications

(79 reference statements)

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“…A yearly average of 540 mm falls North of the river. Wei River Basin has suffered from the effects of flooding through many years, threatening both the livelihood and fragile environment of the region, particularly in the areas of the downstream floodplain (Jiang et al, 2004;Liang, 2006;Pang, 2007b;Tao and Dang, 2011;Tian et al, 2010;Xing et al, 2004;Zhao et al, 2010). Between 1950 and, more than 60 floods occurred in the Wei river catchment, causing destruction of direct properties costing 17.1 billion RMBs (about 2.75 billion US Dollars) affecting a total population of 70.67 million, a death toll of 5300 people and inundation of 9.68 million ha of agriculture areas (Yan, 2008).…”

Section: Methods To Assess Floodingmentioning

confidence: 99%

Flood analysis in the Wei River Basin

Gai¹

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Floods are recognized among Earth's most common and destructive natural hazards (Hirabayashi et al., 2013;Winsemius et al., 2015). A flood is defined as a large amount of water that overflows onto normally dry land (Merriam-Webster dictionary). Depending on the location and triggers of the flood occurrence, there is the distinction among coastal floods, flash floods and river floods (Berz et al., 2001;Jonkman, 2005;Kron, 2005). Coastal floods are usually led by strong tides and winds from the sea or big lakes, occasionally triggered by earthquakes in the ocean (Blöschl et al., 2015). Flash floods can be initiated by excessive rainfall, dam breach or glacier lake outburst that generally happens in relatively small areas (Hapuarachchi et al., 2011). A river flood, however, can involve multiple factors, occur in small or big catchments, and evolve more slowly than e.g. flash floods (Blöschl et al., 2015;Kron, 2005). This thesis focus on better understanding of typical river floods.Three types of factors influence flood occurrence: meteorological factors, biophysical factors and anthropogenic factors. Meteorological conditions might cause intensive rainfall, leading to surface runoff, which can be partially offset by evaporation depending on the temperature, wind and solar radiation conditions (Beven, 2012;Lindsey and Farnsworth, 1997;Nkemdirim, 1991). Biophysical factors, such as elevation, slope, vegetation and soil conditions will determine whether intensive rainfall and runoff will result in the development of a flood. Soil saturation and high intensity rainfall enhance runoff and flood development (Brocca et al., 2008;Chifflard et al., 2018;Saini et al., 2016). Channel formation of the flood plain and sedimentation-induced river bed elevation can also cause floodings Reisenbüchler et al., 2019;Wyzga, 2001). Anthropogenic factors like expansion of built-up areas and increasing arable land at the expense of nature reserves and forested areas impact the hydrological processes in watersheds distinctly, often increasing risks and frequency of floods at the end (

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Section: Methods To Assess Floodingmentioning

confidence: 99%

Flood analysis in the Wei River Basin

Gai¹

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Water quantity and quality changes from forested riparian buffer in Beijing

Zhang

et al. 2019

Environ Sci Pollut Res

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Morphological Evolution Characteristics of River Cross-Sections in the Lower Weihe River and Their Response to Streamflow and Sediment Changes

Qiu

et al. 2022

Water

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River cross−section morphology and water and sediment conditions are deeply connected. In recent years, the lower Wei River has experienced regular flooding and drastic changes in river channel shape, causing significant harm to the economy and development of the lower reaches. This research investigated the morphological evolution features based on annual extensive cross−section data and water and sediment data from the hydrological stations of Xianyang, Lintong, and Huaxian in the lower Weihe River from 2006 to 2018 of river cross−sections and the reaction to water and sediment variations. The findings indicated that the lower Wei River’s cross−sectional alterations between 2006 and 2018 exhibited a trend of “flushing at both ends and siltation in the middle” while continuing to exhibit “non−flood flushing and flood siltation” features. The incoming sediment coefficient in the lower Weihe River declined dramatically, whereas the median diameter of suspended sediment particles grew significantly at the Lintong station. The average elevation of the river channel was highly synchronized with the change in the coming sediment coefficient, and the impact of big floods dramatically influenced the shape of the river cross−section. Human activities such as river management have directly affected the morphology of the river cross−section at Lintong station and caused a significant increase in the median diameter of suspended sediment particles, resulting in siltation in the Lintong river. The study’s findings can serve as a theoretical foundation for water and sediment regulation and river training in the lower Weihe River, reducing flooding damage.

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Temporal variation of over‐bank flooding of Wei River and its impact on a riparian wetland in Xi'an, China

Cited by 3 publications

References 50 publications

Flood analysis in the Wei River Basin

Flood analysis in the Wei River Basin

Water quantity and quality changes from forested riparian buffer in Beijing

Morphological Evolution Characteristics of River Cross-Sections in the Lower Weihe River and Their Response to Streamflow and Sediment Changes

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