Comparative study of the modern flood slackwater deposits in the upper reaches of Hanjiang and Weihe River Valleys, China

Zhang, Yuzhu; Huang, Chun Chang; Pang, Jiangli; Zha, Xiaochun; Zhou, Yali; Shuyan, Yin; Wang, Juan

doi:10.1016/j.quaint.2012.03.056

Cited by 25 publications

(16 citation statements)

References 21 publications

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“…Results confirm, however, that flood deposits are readily observed in these settings that can considerably broaden the scope for palaeoflood hydrology across the globe. Like previous studies (e.g., Kale et al, 2010;Zhang et al, 2012, Huang et al, 2013Wasson et al, 2013), there now seems to be general consensus that SWD can move beyond the bedrock gorge, where well-preserved flood units are found in flow expansive and backwater settings, serving as a useful addition to sample settings. Importantly, the macrochannel settings of SEQ fulfil the stable boundary conditions required to provide robust discharge estimates because they have experienced minimal channel adjustments over the past 200 years (Fryirs et al, 2015;Thompson et al, 2016) and even over the longer timescale of the Holocene (Croke et al, 2016a(Croke et al, , 2016bDaley et al, 2016).…”

Section: Recognised Challenges In the Application Of Swd To Flood Estmentioning

confidence: 56%

Beyond the gorge: Palaeoflood reconstruction from slackwater deposits in a range of physiographic settings in subtropical Australia

et al. 2017

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The application of palaeoflood hydrology in Australia has been limited since its initial introduction more than 30 years ago. This study adopts a regional, field-based approach to sampling slackwater deposits in a subtropical setting in southeast Queensland beyond the traditional arid setting. We explore the potential and challenges of using sites outside the traditional physiographical setting of bedrock gorges. Over 30 flood units were identified across different physiographical settings using a range of criteria. Evidence of charcoal-rich layers and palaeosol development assisted in the identification and separation of distinct flood units. The OSL-dated flood units are relatively young with two-thirds of the samples being <1000 years old. The elevation of all flood units have resulted in estimated minimum discharges greater than the 1% annual exceedance probability. Although these are in the same order of gauged flood magnitudes, >80% of them classified as 'extreme event'. This study opens up the renewed possibility of applying palaeoflood hydrology to more populated parts of Australia where the need for improved estimation of flood frequency and magnitude is now urgent in light of several extreme flood events. Preliminary contributions to improve the understanding between high magnitude floods and regional climatic drivers are also discussed. Recognised regional extreme floods generally coincide with La Niña and negative IPO phases, while tropical cyclones appear to be a key weather system in generating such large floods.

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Section: Recognised Challenges In the Application Of Swd To Flood Estmentioning

confidence: 56%

Beyond the gorge: Palaeoflood reconstruction from slackwater deposits in a range of physiographic settings in subtropical Australia

et al. 2017

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“…8a-c). The high CI values of the sand and coarse-silt fractions suggest that Neoproterozoic and Triassic granite in the South Qinling area or Quaternary loess in the Hanjiang drainage basin contributed to the coarse-silt and sand fractions (Meng and Zhang 2000;Dong et al 2011;Zhang et al 2012;Dong and Santosh 2016).…”

Section: Differences In Esr Signal Intensity and CI Values Among The mentioning

confidence: 99%

“…The upper part of the Hanjiang drainage basin belongs to the Qinling orogenic belt and is composed of Neoproterozoic basement and Neoproterozoic-Devonian sediments (Qin et al 2010). Quaternary loess deposits also occur in some parts of the upper Hanjiang drainage basin (Zhang et al 2012). The Jianghan Plain forms the middle to lower part of the Hanjiang drainage basin.…”

Section: Geologic Settingmentioning

confidence: 99%

ESR signal intensity of quartz in the fine-silt fraction of riverbed sediments from the Yangtze River: a provenance tracer for suspended particulate matter

Saito

Tada

Zheng

et al. 2017

Prog. in Earth and Planet. Sci.

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The Asian summer monsoon exerts a strong influence on the hydrologic cycle in East Asia. Moreover, the distribution of heavy precipitation in the Yangtze River basin, which covers a large area of South China, is sensitive to changes in monsoon intensity. Thus, the paleo-distribution of heavy precipitation in the Yangtze basin is key in reconstructing the paleo-monsoon intensity. In this study, we established proxies for distinguishing sediments from the northwestern and southeastern parts of the Yangtze River basin, with the goal of using them to reconstruct the paleo-distribution of heavy precipitation in the basin based on changes in the provenance of detrital sediments, as determined using sediment records at the river mouth. The proxies included the electron spin resonance (ESR) signal intensity and the crystallinity index (CI) of quartz in modern riverbed sediments along the mainstream and tributaries of the Yangtze River. The data revealed that the fine-silt fraction of the sediments (which represents suspended particulate matter, SPM) from each major tributary can be distinguished on the basis of ESR signal intensity and CI values. The values for each tributary reflect the age and type of bedrock in the tributary basin and show distinct regional variations according to the distribution of geological blocks within the Yangtze basin. In addition, the analyzed ESR signal intensity and CI values of the fine-silt fraction of riverbed sediments below mainstream-tributary junctions agree well with values calculated according to a simple mixing model of SPM discharged from the tributaries and the mainstream.

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“…on the varied water runoff and SSL, and the ratios are temporally varied. Former researchers have analyzed the contributions of human activities and climate change [5,[33][34][35][36][37][38][39], as shown in Tables 2 and 3 …”

Section: Effects Of Human Activities On River Segmentsmentioning

confidence: 99%

Effects of Human Activities in the Wei River Basin on the Lower Yellow River, China

2017

Pol. J. Environ. Stud.

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Comparative study of the modern flood slackwater deposits in the upper reaches of Hanjiang and Weihe River Valleys, China

Cited by 25 publications

References 21 publications

Beyond the gorge: Palaeoflood reconstruction from slackwater deposits in a range of physiographic settings in subtropical Australia

Beyond the gorge: Palaeoflood reconstruction from slackwater deposits in a range of physiographic settings in subtropical Australia

ESR signal intensity of quartz in the fine-silt fraction of riverbed sediments from the Yangtze River: a provenance tracer for suspended particulate matter

Effects of Human Activities in the Wei River Basin on the Lower Yellow River, China

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