首页|Numerical Investigation of Land Reclamation Effects on Hydrodynamics and Mangroves in Shacheng Bay for the Last 36 Years

Numerical Investigation of Land Reclamation Effects on Hydrodynamics and Mangroves in Shacheng Bay for the Last 36 Years

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Since the 1980s,the robust economic growth of China has prompted extensive land reclamation projects along its coast-line,notably affecting local hydrodynamics and resulting in ecological repercussions.Using a nearshore finite volume ocean model,we constructed a hydrodynamic model for Shacheng Bay,a southeastern coastal region with a winding and narrow entrance.We exam-ined the hydrodynamic changes and mangrove dynamics over the past 36 years and the relationship between hydrodynamic altera-tions and mangrove degradation.Simulation results reveal that extensive reclamation projects between 1984 and 2000 weakened the current in Shacheng Bay,leading to decreased water exchange capacity and a significant reduction in mangrove area from 0.3 to 0.06 km2.During this period,over 37%of mangrove degradation was ascribed to time-changing hydrodynamic variables without the di-rect influence of land reclamation.The results also highlight the changes in local hydrodynamics and water exchange patterns that adversely influenced mangrove growth.From 2000 to 2020,there were minimal coastline changes in Shacheng Bay,demonstrating reduced land reclamation activities.This stopped the further weakening trend of the currents,with a slight increase during ebb tides,while the residual current continued to weaken due to the decreasing tidal prism and water exchange capacity.The mangrove area partially recovered during this period,expanding from 0.06 to 0.11 km2,predominantly in new areas instead of where mangroves disap-peared from 1984 to 2000.This work underlines the intricate relationship between land reclamation,hydrodynamics,and mangrove ecosystems,underscoring the need for sustainable coastal development strategies.

reclamationhydrodynamicmangrovewater exchange

WU Zetao、YU Huaming、SHOLA Ayinde Akeem、CHANG Xiaofeng、JIANG Wanjun

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College of Oceanic and Atmospheric Sciences,Ocean University of China,Qingdao 266100,China

Sanya Oceanographic Institution,Sanya 572000,China

Marine Meteorology&Climate Department,Nigerian Institute for Oceanography and Marine Research,Lagos 12729,Nigeria

Physical Education Department,Ocean University of China,Qingdao 266100,China

The North China Sea Area&Island Center,Ministry of Natural Resources,Qingdao 266061,China

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2024

10.1007/s11802-024-5750-6

中国海洋大学学报(自然科学英文版)
中国海洋大学

中国海洋大学学报(自然科学英文版)

CSTPCD
影响因子：0.268
ISSN：1672-5182
年,卷(期)：2024.23(6)