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Observation of physical variables of coastal wetland and response of wetland system under the influence of typhoon process
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Gaoru Li1, 2, Guoning Gong1, 2, Shengle Zhang1, 2, Meihua Gao1, 2, Bolun Zhang1, 2, Yuxi Ma3, Peimin He1, 2, Shubo Fang1, 2, *
Haiyang Xuebao | 2022, 44(12) : 116 - 125
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Haiyang Xuebao | 2022, 44(12): 116-125
• Article •
Observation of physical variables of coastal wetland and response of wetland system under the influence of typhoon process
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Gaoru Li1, 2, Guoning Gong1, 2, Shengle Zhang1, 2, Meihua Gao1, 2, Bolun Zhang1, 2, Yuxi Ma3, Peimin He1, 2, Shubo Fang1, 2, *
Affiliations
  • 1. College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
  • 2. Research Center of Water Environment & Ecological Engineering, Shanghai Ocean University, Shanghai 201306, China
  • 3. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
Published: 2022-12-01 doi: 10.12284/hyxb2022155
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How to study the response process of wetland system under the influence of extreme weather events such as typhoon, and then put forward effective ecological integrity maintenance and management schemes is of great significance to wetland management and ecological security maintenance in key areas. In this paper, during the process of “Chanthu” Typhoon in September 2021, hydrodynamic observation points were set up on the South Bank of Nanhui east tidal flat, surface sediments were collected, tidal flat surface elevation was measured, and vegetation images were obtained by unmanned aerial vehicle. Using ArcGIS spatial analysis, the hydrodynamic and sedimentary changes of Nanhui east tidal flat and the response of tidal flat surface elevation, surface sediments and vegetation distribution area were discussed. The results show that the average effective wave height and wave energy at the edge of the vegetation are 1.54 times and 2.14 times in the typhoon, the average current velocity near the bottom layer is 0.23 m/s, and a “high suspended sediment concentration layer” (>10 g/L) with a thickness of more than 1 m appears on the tidal flat for 8.13 h. After the typhoon, the tidal flat surface of Scirpus mariqueter and Spartina alterniflora distributed sparsely below 4 m eroded 0−4.8 cm, and the tidal flat surface with lush growth of Spartina alterniflora and Phragmites australis above 4 m deposited 0−14.7 cm. The distribution area of vegetation in the study area decreased by 1827.67 m2, accounting for 1.63% of the total vegetation before the typhoon, including 31.9% of the eroded tidal flat vegetation and 68.1% of the deposited tidal flat vegetation. The wetland management after the typhoon process can be summarized as follows: (1) The wetland basically shows the characteristics of coexistence of erosion and accretion areas after the typhoon process; (2) For the tidal flat surface with an elevation lower than 4 m, it is suggested to determine the elevation suitable for vegetation growth, combine the erosion and deposition changes during the typhoon process, and use the “microbial film” and vegetation patch transplantation to dissipate waves, consolidate the tidal flat and promote accretion, so as to accelerate the rapid restoration of the wetland after the impact of the typhoon process.

typhoon  /  coastal wetlands  /  hydrodynamic force  /  deposition  /  response process
Gaoru Li, Guoning Gong, Shengle Zhang, Meihua Gao, Bolun Zhang, Yuxi Ma, Peimin He, Shubo Fang. Observation of physical variables of coastal wetland and response of wetland system under the influence of typhoon process[J]. Haiyang Xuebao, 2022 , 44 (12) : 116 -125 . DOI: 10.12284/hyxb2022155
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Article Info
doi: 10.12284/hyxb2022155
  • Receive Date：2022-04-01
  • Online Date：2026-02-01
  • Published：2022-12-01
Article Data
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History
  • Received：2022-04-01
  • Revised：2022-06-10
Funding
Affiliations
    1. College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
    2. Research Center of Water Environment & Ecological Engineering, Shanghai Ocean University, Shanghai 201306, China
    3. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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