CAJ | 학술논문

海岸盐沼是海岸湿地系统的重要组成部分,具有很强的环境调节功能.互花米草(Spartina alterniflora)的引种对海岸盐沼的沉积动力产生很大影响.粒度分析结果表明,互花米草盐沼边缘与沉积物平均粒径为6.7φ的等值线分布一致.现场观测表明,互花米草对流速具有明显的阻滞作用,使得光滩流速明显大于互花米草内的流速;在互花米草滩内,随着离盐沼边缘距离、植被高度、植株直径的不同,涨落潮流速也表现出不同的变化趋势.粒径趋势分析结果显示,互花米草盐沼边缘的表层沉积物由光滩向盐沼内输运,潮水沟的存在对沉积物的输运格局具有显著影响.对比分析表明落潮后期的水动力条件控制着研究区内表层沉积物的净输运方向.
해안염소시해안습지계통적중요조성부분,구유흔강적배경조절공능.호화미초(Spartina alterniflora)적인충대해안염소적침적동력산생흔대영향.립도분석결과표명,호화미초염소변연여침적물평균립경위6.7φ적등치선분포일치.현장관측표명,호화미초대류속구유명현적조체작용,사득광탄류속명현대우호화미초내적류속;재호화미초탄내,수착리염소변연거리、식피고도、식주직경적불동,창락조류속야표현출불동적변화추세.립경추세분석결과현시,호화미초염소변연적표층침적물유광탄향염소내수운,조수구적존재대침적물적수운격국구유현저영향.대비분석표명락조후기적수동력조건공제착연구구내표층침적물적정수운방향.
Coastal saltmarshes represent an important coastal wetland system.The introduction of Spartina alterniflora Loisel influences the sediment dynamic of coastal saltmarshes.Grain size analysis shows that the marsh edge is distributed along the contour of sediment mean grain size with the value of 6.7φ.In situ measurements show that the current velocities on bare flat are much higher than those in Spartina alterniflora marsh and the current velocities are also distinct with the different distances from S.alterniflora marsh edge,different canopy heights and diameters.Grain size trend analysis indicate that the surface sediments near the marsh edge are transported from bare flat to marsh;the existence of tidal creeks may change the sediment transport pattern.Comparative analysis indicates that the net transport directions in the study area are controlled by hydrody namic at the late ebb tide phase.