华东地质2025，Vol.46Issue(4)：504-516,13.DOI:10.16788/j.hddz.32-1865/P.2025.04.010
围垦作用下珠江口黄茅海岸滩沉积演变规律及其资源管控建议
Reclamation-induced sedimentary changes and management recommendations of the marginal shoals along the Huangmao Estuary,Pearl Delta
摘要
Abstract
Studying the sedimentary changes and land resource variation trends of the marginal shoals influ-enced by human activities plays significant guiding role for the protection and efficient utilization of coastal re-sources.Based on multi-decadal topographic data(1940-2015)and remote sensing images,this study systemati-cally investigates the impacts of reclamation on the sedimentary regime and land resource variations of the Huangmao Estuary's marginal shoals,hence proposes targeted management recommendations.The results indi-cate that:①While the marginal shoals overall maintained a progradational trend,high-intensity reclamation caused dramatic seaward advancement of coastlines on both sides of the estuary,leading to a sharp decline in Huangmao Estuary's marginal shoal resources(with the area above-1 m and-2 m decreasing by 29 km2 and 73 km2,respectively).This even resulted in the complete absence of the-1 m isobaths shoal throughout the estu-ary during the 1990s.②Reclamation altered the spatial distribution of the Huangmao Estuary's marginal shoal re-sources.Accretion along the eastern bank slowed and the proportion of land resources thus decreased,due to the constraint of the navigation channel.Meanwhile,the marginal shoals extended significantly downstream after 2000 because of insufficient progradation space in the mid-upper sections.③Reclamation reduced the estuarine tidal prism,which was overall beneficial for the accretion of the Huangmao Estuary's marginal shoals.However,such impacts varied significantly at local scales and exhibited a clear time-lagged effect.This paper proposed management recommendations based on the research above,including altering reclamation intensity according to marginal shoal accretion rates,avoiding reclamation at sensitive areas(e.g.,the entrance of estuaries),and adapt-ing industrial layouts within reclamation zones.This study provides a scientific basis for estuarine resource ex-ploitation and sustainable management.关键词
围垦/珠江口黄茅海/岸滩/沉积演变/资源管控Key words
reclamation/Huangmao Estuary/marginal shoal/sedimentary changes/resource management分类
天文与地球科学引用本文复制引用
YE Lu,WEI Wen,LIU Gang,YANG Yulu..围垦作用下珠江口黄茅海岸滩沉积演变规律及其资源管控建议[J].华东地质,2025,46(4):504-516,13.基金项目
国家自然科学基金"长江口南汇嘴地貌状态转换及重塑过程研究(编号:42276173)"和广东省基础与应用基础研究基金"人为作用下珠江口黄茅海地貌异变及再平衡机制(编号:2023A1515030088)"项目联合资助. （编号:42276173）
