Sand-mud transition dynamics at embayed beaches during a typhoon season in eastern China

Guo, Junli; Shi, Lei; Chen, Shenliang; Castelle, Bruno; Yang, Chengquan; Cheng, Wufeng

doi:10.1016/j.margeo.2021.106633

Cited by 8 publications

(6 citation statements)

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“…The sandy beaches in Qingdao have been affected by shortage of sediment due to sand dredging on the beaches and/or adjacent offshore areas and reduction in the sand sourced from river channels and longshore transport. Similarly, the natural condition on Zhejiang beaches supports the sedimentation of muddy materials, however, the harsh condition of the coast could have improved the presence of sandy material on the studied beaches [18,30] .…”

Section: Second Stagementioning

confidence: 94%

“…In an interesting twist, the storm condition on the studied beach has been linked to the presence of sand material on a coast characterized by low-energy swells [18,30] . The high waves created during the storm conditions, the topography, and the morphology of the beaches could promote the sedimentation of sand material by shifting the Sand Mud Transition (SMT) offshore.…”

Section: Muddy Coast Beaches (Zhejiang) Controlling Factorsmentioning

confidence: 99%

“…The large fine sediment discharge from the rivers, longshore current, and wave characteristics have created small embayed sandy pockets in Yalimapo, French Guiana [15] , and Cayenne, French Guiana [16,17] . The condition is facilitated by complex interactions between different factors such as the source of sediment supply to the coast, longshore current direction and intensity, nearshore wave energy, storm conditions as well as ocean currents [15][16][17][18] .…”

Section: Introductionmentioning

confidence: 99%

“…The vulnerability of sandy beaches to erosion is culminated by the inherent and external characteristics and factors acting on the beach, including beach material composition, geology, beach profile, sea level, the shape of the beach, and storm activities on the beach [24][25][26][27][28] . Studies accessing the long-term and short-term changes and vulnerabilities of sandy beaches have employed several methods of analysis including geophysical observation and analysis [7,18] , computer modeling [1,4,5,29] , geochronology [30] and satellite images [8,9,11] .…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have attempted to define the vulnerability and as well, describe the contributing factors of Mainland China to erosion [1,2,5,7,[10][11][12]14,18,29,30] . However, most of these studies have focused specifically on large-scale (entire Chinese coast) and regional (sections of the Chinese coast with the same geological characteristics and nearshore dynamics).…”

Section: Introductionmentioning

confidence: 99%

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The different erosion fate of the headland-embayed beaches on the muddy and sandy coasts of China

Osanyintuyi,

Wang,

Huang

et al. 2023

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<p>China’s beaches exhibit different geomorphic characteristics depending on location. Due to increasing contemporary climate change, induced storm activities and human activities, beaches along the Chinese coast have been exposed to the risk of erosion. This article examines the different shoreline evolution processes from 1973 to 2021 as well as the erosion vulnerability of 9 headland-embayed beaches (of which 5 beaches, each at Baishawan, Dasha, Dongdan, Nanshajiao, and Mushao are on the muddy coast in Southern China and 4 beaches, namely, Bathing Beach 1, 2, 3 and Shilaoren Beach are on the sandy coast in Northern China) based on the inherent geomorphic characteristics and nearshore hydroclimatic factors of the beaches. In the analysis, there were 3 stages. During the first stage, erosion dominated both the muddy and sandy coasts as a result of intense storm conditions. During the second stage, the beaches had earlier recovered as a function of natural processes, however, storm activities later eroded the beaches. During the third stage, most of the beaches accreted as a result of coastal engineering interventions and beach nourishment project. The shoreline analysis results indicate that beaches on the muddy and sandy coasts have been eroding in the long term. During the first erosion stage, erosion is more severe on the muddy coast than on the sandy coast in the short term. On the sandy coast, the beaches recorded severe erosion from 1973 to 1998. Of the 9 beaches, the most eroded location was at Dasha on the muddy coast (LRR: –5.315 m/y; EPR: –5.671 m/y; NSM: –141.94 m) between 1974 and 1998. In summary, beaches on muddy coasts are more vulnerable to erosion than those on sandy coasts. On the muddy coast, there has been a shortage in the supply of sediment from the Yangtze River-derived sediment to the coast. The primary source of sand material for the studied beaches on the muddy coast has been the regular storm condition that changes the sand-mud transition line on the coast. For the sandy beaches, the primary factor responsible for the vulnerability and beach modification includes a shortage in the natural supply of beach material and storm activities, however, recent beach nourishment and coastal protection procedures are gradually stabilizing the beaches. Ultimately, the outcome of this research is suitable for beach management procedures on the Chinese coast.</p>

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Section: Second Stagementioning

confidence: 94%

Section: Muddy Coast Beaches (Zhejiang) Controlling Factorsmentioning

confidence: 99%