Erosional cascade during the 2021 Melamchi flood

IF 15.7 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Nature Geoscience Pub Date : 2024-12-04 DOI:10.1038/s41561-024-01596-x

Chan-Mao Chen, James Hollingsworth, Marin K. Clark, Deepak Chamlagain, Sujata Bista, Dimitrios Zekkos, Anuj Siwakoti, A. Joshua West

引用次数: 0

Abstract

In 2021, a catastrophic flood occurred in the Melamchi Valley of Nepal, causing widely distributed erosion in Himalayan headwaters and mobilizing a large sediment volume. As the flood progressed downstream, it induced an erosional cascade, producing 100 m deep incisions into high-elevation valley fills, generating new landslides and burying the lower reaches in alluvium. This event demonstrated the destructive impact of cascading processes and their potential for reshaping the landscape. The 2021 flood in the Melamchi Valley of Nepal triggered a cascade of erosional effects that contributed to the substantial downstream impacts, according to an analysis of satellite imagery and digital surface models.

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2021年梅兰奇洪水期间的侵蚀级联

2021年，尼泊尔梅拉姆奇河谷发生了一场灾难性的洪水，造成喜马拉雅源头大面积侵蚀，并调动了大量沉积物。随着洪水向下游推进，它引发了一个侵蚀级联，在高海拔的山谷填充物中产生了100米深的切口，产生了新的滑坡，并将下游埋在冲积层中。这一事件证明了级联过程的破坏性影响及其重塑景观的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nature Geoscience 地学-地球科学综合

CiteScore

26.70

自引率

1.60%

发文量

187

审稿时长

3.3 months

期刊介绍： Nature Geoscience is a monthly interdisciplinary journal that gathers top-tier research spanning Earth Sciences and related fields. The journal covers all geoscience disciplines, including fieldwork, modeling, and theoretical studies. Topics include atmospheric science, biogeochemistry, climate science, geobiology, geochemistry, geoinformatics, remote sensing, geology, geomagnetism, paleomagnetism, geomorphology, geophysics, glaciology, hydrology, limnology, mineralogy, oceanography, paleontology, paleoclimatology, paleoceanography, petrology, planetary science, seismology, space physics, tectonics, and volcanology. Nature Geoscience upholds its commitment to publishing significant, high-quality Earth Sciences research through fair, rapid, and rigorous peer review, overseen by a team of full-time professional editors.