渤海湾贝壳堤的横截面形态与内涵
The cross-sectional morphology and connotation of the shelly ridges in Bohai Bay
摘要
Abstract
This paper is the study of shelly ridges. [Objective]A shelly ridge is a long,ridge-shaped raised seawall formed by waves and tides continuously transporting shells,mud,and sand from the sea towards the shore and accumulating them along the coastline.The cross-section perpendicular to the ridge's trend reveals the material composition,sedimentary structure and external morphology of the ridge,which is an important starting point for studying issues such as the origin,formation process,spatiotemporal distribution,and relationship with the sea level of the shelly ridge.[Methods]There are 5 to 8 shelly ridges distributed in the coastal plain of the Bohai Bay.Through the analysis of the cross-sectional morphology of the shelly ridges at 11 locations,the cross-sectional morphology,sediment composition,and sedimentary structure of the shelly ridges were identified,and the origin of the shelly ridges was discussed.[Results]The cross-sectional morphology of the shelly ridges can be divided into three types:complete type,semi-complete type,and eroded-retreated type.Furthermore,according to the base and initial development morphology of the shelly ridges,the accumulation bodies of the shelly ridges in the Bohai Bay are divided into four types:intertidal erosion slope attachment type,landward-inclined type at the rear edge of the mud ridge,upward-growing type of the sandy-muddy intertidal sandbar,and modern shell beach type.A hypothesis about the climatic origin of the formation of the seaward-inclined slope-accumulated shell body is proposed.[Conclusions]In the recent approximately 150 years since the end of the"Little Ice Age",the climate change influenced by human activities has intensified the latest round of the transgression and regression process,which is a general trend for the entire Bohai Bay(and even the muddy coastal zones across the country?).The appearance of the shell beach at the base of the embankment outside the aquaculture ponds is the embryonic form of a new shelly ridge.Currently,it is advisable to stop the efforts to restore the abandoned aquaculture areas to the state in the early 1980s.Instead,efforts should be made to protect the newly formed shell beaches around the aquaculture areas and actively promote the emergence of a new ecological environment.关键词
渤海湾/贝壳堤/横截面形态/底板/气候变化Key words
Bohai Bay/shelly ridge/cross-sectional morphology/base/climate change分类
天文与地球科学引用本文复制引用
商志文,王兴,王宏,李建芬,文明征,陈永胜,吕允奇,姜兴钰,王福,田立柱,杨朋..渤海湾贝壳堤的横截面形态与内涵[J].华北地质,2025,48(2):44-77,34.基金项目
国家地质调查海岸带典型区生态地质调查项目(DD20211301) （DD20211301）
科技部科技基础资源调查专项专题(2021FY101003) （2021FY101003）
自然科学基金重大项目子课题(42293261) （42293261）
环渤海滨海湿地地下水资源相关资料收集及调查(2021FY101001) （2021FY101001）
中央林业草原生态保护恢复资金项目(BZWDGP-2023-0174)和河北省黄骅市古贝壳堤省级自然保护区专项本底调查项目. Supported by the Project of Key Ecological Protection and Restoration Areas in the Yellow River and Bohai Sea Coastal Zone,National Geological Investigation Project(DD20211301) （BZWDGP-2023-0174）
the Special Project of Basic Resources Survey of the Ministry of Science and Technology for the Investigation and Evaluation of the Bohai Coastline(2021FY101003) （2021FY101003）
the National Science Foundation of China's Research on the Geological Structure and Lithofacies Paleogeography of the Critical Zone in the Bohai Rim(42293261) （42293261）
Data Collection and Investigation of Groundwater Resources in Coastal Wetlands Around the Bohai Sea(2021FY101001) （2021FY101001）
Central Forestry and Grassland Ecological Protection and Restoration Fund(BZWDGP-2023-0174) （BZWDGP-2023-0174）
Baseline Survey Project for the Provincial Nature Reserve of Ancient Shelly Ridges in Huanghua City,Hebei Province. （）
