Evolution Characteristics of Near-bank Riverbed Erosion andDeposition in Vulnerable Sections of Middle Yangtze River over the Past Decade

ZOU Hong-mei; YANG Cheng-gang; YUAN Jing; DONG Bing-jiang

doi:10.11988/ckyyb.20231380

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Journal of Changjiang River Scientific Research Institute ›› 2024, Vol. 41 ›› Issue (6) : 187-192. DOI: 10.11988/ckyyb.20231380

Special Column on Innovative Development of Yangtze River Governance and Protection: Academic Symposium of the 20th Anniversary of Three Gorges Project Operation

Evolution Characteristics of Near-bank Riverbed Erosion andDeposition in Vulnerable Sections of Middle Yangtze River over the Past Decade

ZOU Hong-mei, YANG Cheng-gang, YUAN Jing, DONG Bing-jiang

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Abstract

Vulnerable riverbank slopes are prone to collapses and thus represents weak links of the Yangtze River flood control system.The evolution of vulnerable riverbank slopes directly impact levee stability and flood control safety.Based on a decade of observations of vulnerable sections of the middle reach of Yangtze River,we investigate the evolution patterns of vulnerable riverbank slopes and explore how water and sediment conditions,regulatory projects,and soil composition influence riverbed dynamics.Findings reveal that river regulation projects notably influence the stability of the near-bank riverbed,with a tendency towards bank slope stabilization being a prevailing trend.However,approximately one-third of the vulnerable sections exhibit a continued erosion steepening,attributed to local river regime adjustments.Vigilant monitoring and corresponding protective measures are thus imperative.These research outcomes hold significant implications for analyzing and projecting the development trend of key riverbank sections in the middle reach of Yangtze River and optimizing observation site layouts for these critical sections.

Key words

middle reach of Yangtze River / dangerous section / bank slope stability / water and sediment conditions / erosion and deposition evolution

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ZOU Hong-mei, YANG Cheng-gang, YUAN Jing, DONG Bing-jiang. Evolution Characteristics of Near-bank Riverbed Erosion andDeposition in Vulnerable Sections of Middle Yangtze River over the Past Decade[J]. Journal of Changjiang River Scientific Research Institute. 2024, 41(6): 187-192 https://doi.org/10.11988/ckyyb.20231380

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