作　　者： ; (黄鹄）; (盛凯）;

机构地区： 教育部

出　　处： 《台湾海峡》 2011年第2期275-279,共5页

摘　　要： 基于历史图件对比方法和Bruun法则对广西北海银滩岸线的侵蚀进行评估和预测.结果表明银滩在近30a内海岸侵蚀达10.40 m/a,其中人类活动作用是造成海岸侵蚀的主要因素,人类活动对岸线位置蚀退的影响贡献为98%;海平面上升导致岸线蚀退的贡献仅为2%.然而,在未来100 a内,基于历史图件对比分析估算的银滩侵蚀宽度可能超过1 000 m,银滩环境将会发生退化.因海平面上升而对岸线蚀退的贡献权重增加为9%.由于人类活动导致的银滩退化可以进行控制和预防,故对未来海平面上升引发的银滩环境退化应该予以重点关注. Coastal erosion is an extremely complex natural phenomenon.Because of abnormalities of water and sediment passing from a river basin into the sea,expansion of social economic activities,and urbanization of shore region,coastal erosion has worsened in recent decades under the conditions of global warming and sea-level rise around the world.This poses a serious challenge to ecology and the environment in coastal regions.Although exploitation of the coast in Guangxi province has lagged that in other regions,the impacts of tourism development on the coastal zone of Beihai are intensive,especially since the acceleration of erosion along the Yintan coastline,in Beihai,Guangxi province.Thus,coastline erosion in Yintan is assessed and predicted on the basis of historic charts and the Bruun principle in this paper.Additionally,intrinsic contributions to coastal erosion from human activities and the sea-level rise are investigated,and trends of changes to the Beihai coast are assessed.Our research shows that in the last 30 years,human activity has accounted for 98% of coastal erosion in Yintan,dwarfing the impact of the sea-level rise,which only accounted for 2%.Considering the change to the shoreline,we conclude that coastal erosion of Yintan will possibly intensify over a distance over 1 000 m in the next 100 years,which could induce eventual aggradation of the Yintan environment.In addition,the contribution of the sea-level rise to coastal erosion will increase to 9%.Because the aggradation of the Yintan environment resulting from human activity can be controlled and prevented,emphasis should be placed on coastal erosion resulting from the future sea-level rise.

关 键 词： 海洋地质学 北海银滩 海岸侵蚀 海平面上升 人类活动

领　　域： [天文地球] [天文地球]