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Episodically volatile high energy non-cohesive river-floodplain systems: New information from the Ping River, Thailand, and a global review
Geomorphology ( IF 3.1 ) Pub Date : 2021-02-23 , DOI: 10.1016/j.geomorph.2021.107658
Robert J. Wasson , Alan Ziegler , Han She Lim , Elisha Teo , Daryl Lam , David Higgitt , Tammy Rittenour , Khairun Nisha Bte Mohamed Ramdzan , Chuah Chong Joon , Ashok K. Singhvi

Volatile rivers that involve floodplain stripping and subsequent floodplain reconstruction by vertical accretion are poorly known worldwide. This paper aims to partially fill this knowledge gap by a review of existing information and the provision of the currently most detailed account of such a river, namely the Ping River of northern Thailand. Recognition of this river type depends upon stratigraphic and morphostratigraphic analysis and so does not come within the ambit of those who focus only on river form and modern flood hydrology, and also not within the ambit of ‘traditional’ palaeoflood hydrology. A morphostratigraphic analysis of the Ping River adds to the small but valuable corpus of existing studies and provides an indication of the level of detail that is required for an in-depth understanding. A global review shows that extreme rainfall is always involved in floodplain stripping, although the sensitivity to rainfall extremes of catchments is not understood, including the contributions of land use, topography and alluvial resistance to erosion. The Ping River has the same characteristics as other volatile rivers, with an average interarrival time for stripping events of about three centuries probably caused by different combinations of wet periods, tropical lows, typhoons, and atmospheric rivers. As the intensity of extreme rainfall increases as Earth warms, the frequency of floodplain stripping events may increase with implications for both the pace of change in some fluvial landscapes and flood mitigation strategies.



中文翻译:

易挥发的高能非粘性河漫滩系统:来自泰国平河的最新信息以及一项全球回顾

涉及泛滥平原剥夺和随后通过垂直吸积重建泛滥平原的挥发性河流在世界范围内鲜为人知。本文旨在通过回顾现有信息并提供此类河流(即泰国北部的平河)当前最详细的描述来部分弥补这一知识鸿沟。对这种河流类型的认识取决于地层学和地层地层学分析,因此不属于那些只关注河流形态和现代洪水水文学的人,也不属于“传统”古洪水水文学的人。对平河的地层学分析增加了现有研究规模很小但很有价值的资料库,并提供了深入了解所需的详细程度的指示。一项全球审查显示,尽管人们不了解流域极端降雨的敏感性,包括土地利用,地形和冲积层对侵蚀的抵抗力,但洪涝平原剥夺总是涉及极端降雨。平河具有与其他易挥发河相同的特征,平均剥离时间约为三个世纪,这可能是由湿润时期,热带低气压,台风和大气河流的不同组合引起的。随着极端降雨的强度随着地球变暖而增加,洪泛区剥离事件的发生频率可能​​会增加,这对某些河流景观的变化速度和防洪策略都有影响。尽管对集水区极端降雨的敏感性尚不明确,包括土地利用,地形和冲积层对侵蚀的贡献。平河具有与其他易挥发河相同的特征,平均剥离时间约为三个世纪,这可能是由湿润时期,热带低气压,台风和大气河流的不同组合引起的。随着极端降雨的强度随着地球变暖而增加,洪泛区剥离事件的发生频率可能​​会增加,这对某些河流景观的变化速度和防洪策略都有影响。尽管对集水区极端降雨的敏感性尚不明确,包括土地利用,地形和冲积层对侵蚀的贡献。平河具有与其他易挥发河相同的特征,平均剥离时间约为三个世纪,这可能是由湿润时期,热带低气压,台风和大气河流的不同组合引起的。随着极端降雨的强度随着地球变暖而增加,洪泛区剥离事件的发生频率可能​​会增加,这对某些河流景观的变化速度和防洪策略都有影响。剥离事件的平均到达时间大约是三个世纪,这可能是由于潮湿时期,热带低气压,台风和大气河流的不同组合造成的。随着极端降雨的强度随着地球变暖而增加,洪泛区剥离事件的发生频率可能​​会增加,这对某些河流景观的变化速度和防洪策略都有影响。剥离事件的平均到达时间大约是三个世纪,这可能是由于潮湿时期,热带低气压,台风和大气河流的不同组合造成的。随着极端变暖的强度随着地球变暖而增加,洪泛区剥离事件的频率可能会增加,这对某些河流景观的变化速度和防洪策略都有影响。

更新日期:2021-03-15
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