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南海西北部英罗湾红树林保护区光滩近期冲淤变化分析    

Erosion-accretion analysis of bare flats outside the mangrove area in Yingluo Bay, southwestern South China Sea

文献类型:期刊文献

中文题名:南海西北部英罗湾红树林保护区光滩近期冲淤变化分析

英文题名:Erosion-accretion analysis of bare flats outside the mangrove area in Yingluo Bay, southwestern South China Sea

作者:祁雅莉[1,2];付东洋[1];刘大召[1];刘贝[1]

机构:[1]广东海洋大学电子与信息工程学院,广东湛江524088;[2]南京大学地理与海洋科学学院,江苏南京210023

年份:2019

卷号:43

期号:6

起止页码:6

中文期刊名:海洋科学

外文期刊名:Marine Sciences

收录:CSTPCD、、北大核心2017、北大核心

基金:广东高校优秀青年创新人才培养计划项目(2014KQNCX 084);国家自然科学基金重点项目(41530962)~~

语种:中文

中文关键词:光滩;遥感;水动力模型;冲淤;红树林

外文关键词:bare flat;remote sensing;hydrodynamic model;erosion and accretion evolution;mangrove

中文摘要:红树林岸外光滩高程变化是红树林可持续性发展的重要环境因素。本文以南海西北部英罗湾为研究区,利用多时相多源遥感影像提取水边线,并结合迭代的 FVCOM 水动力模型模拟方法,建立了2008 年和 2015 年两个时期红树林岸外光滩数字高程模型(Digital Elevation Model, DEM)。利用两个时期的反演结果进行空间叠置分析,结果表明: 2008 年至 2015 年,湾顶光滩大部分呈现稳定-淤积状态;位于海湾中部至口门的光滩,从上部到下部整体呈现从淤积-稳定-侵蚀的趋势,其中光滩中部局部出现沟壑状侵蚀,与大型潮沟的发育和摆动有关;而光滩上部冲淤的空间差异性,主要由于红树林林区扩张形态以及人类活动的干预。

外文摘要:The change of erosion and deposition of bare flats outside a mangrove area is very important to the living environment of the mangrove. In this paper, the Yingluo Bay area, Southwest China, is taken as a case study. Digital elevation models (DEMs) of the bare flats in 2008 and 2015 were built using the waterlines extracted from remote sensing images. The waterlines were assigned heights using elevations predicted by the hydrodynamic fi- nite-volume coastal ocean model (FVCOM) via an iterative process. The analysis of erosion and accretion changes between 2008 and 2015 show that the bare flat near the bayhead was in a state of deposition and that the bare flat from the entrance to the middle area had the trend of accretion stability erosion from the upper to the lower bare flat. The spatial difference of erosion-accretion distribution in the upper flat is not only related to the expansion of the mangrove area to the sea but also to human activities.

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