CAJ | 학술논문

河流颗粒有机质提供了陆地碳循环的重要信息以及人类活动的记录，通过河口地区沉积物有机质组成，可反映流域变化及海陆间相互作用。2010－2011年分两次于鸭绿江河口西岸潮滩采集柱样4根及表层样23个。对样品进行有机质碳氮总量（TOC、TN）、碳氮同位素（δ13 C、δ15 N）及沉积物粒度测试。分析结果表明，由河口向西，有机质受改造程度加深且来源逐渐复杂化，致 TOC／TN 与δ13 C的相关性逐渐降低，δ15 N 与沉积物粒度的相关性也随之降低。文中以δ13 C 为主线探讨沉积物有机质的来源及运移，TOC／TN 作为辅助，δ15 N 则用于指示生化条件的改变。柱样的δ13 C 分布与河流入海输沙密切相关，水库对入海泥沙的拦截，致河口潮滩沉积速率减缓，从而增加了沉积物中海源有机质的含量，δ13 C 随之增加。潮滩西侧柱样的δ15 N 增加指示了生活工业污水的大量排放。此外，表层样δ13 C 分布的方向性，指示了西水道门口处的快速堆积及潮下带物质的向岸运移，并在西岸潮滩向岸一侧富集。
하류과립유궤질제공료륙지탄순배적중요신식이급인류활동적기록，통과하구지구침적물유궤질조성，가반영류역변화급해륙간상호작용。2010－2011년분량차우압록강하구서안조탄채집주양4근급표층양23개。대양품진행유궤질탄담총량（TOC、TN）、탄담동위소（δ13 C、δ15 N）급침적물립도측시。분석결과표명，유하구향서，유궤질수개조정도가심차래원축점복잡화，치 TOC／TN 여δ13 C적상관성축점강저，δ15 N 여침적물립도적상관성야수지강저。문중이δ13 C 위주선탐토침적물유궤질적래원급운이，TOC／TN 작위보조，δ15 N 칙용우지시생화조건적개변。주양적δ13 C 분포여하류입해수사밀절상관，수고대입해니사적란절，치하구조탄침적속솔감완，종이증가료침적물중해원유궤질적함량，δ13 C 수지증가。조탄서측주양적δ15 N 증가지시료생활공업오수적대량배방。차외，표층양δ13 C 분포적방향성，지시료서수도문구처적쾌속퇴적급조하대물질적향안운이，병재서안조탄향안일측부집。
Riverine particle organic matter (POM)contains key information about terrestrial carbon cycle,and hu-man activities.The basin changes and interaction,between land and sea,can be reflected by the variation of organic matter in sediment from estuary.Four sediment cores and 23 surface samples were collected in tidal flat of west bank of Yalu Estuary in twice from 2010 to 2011.The elemental and C-and N-isotopic compositions of organic matter (OM)were determined,together with sediment grain size.The analysis results show that relationship be-tween TOC/TN andδ13 C decrease,as well as correlation betweenδ15 N and sediment grain size from estuary to west,indicating that reconstruction degree of OM get further and the source of OM get complicated.We useδ13 C to analysis OM’s source and its transport as the principal line,TOC/TN as auxiliary,and useδ15 N to evaluate ecologi-cal environment.The variations ofδ13 C in sediment cores are closely related with river sediment load.Intercepted by dams,the sediment load decreased gradually,causing the deposition rate of tidal flat getting slow,and increasing the marine OM content in sediment.Variation ofδ15 N in core sediment indicates the increasing sewage discharge. Otherwise,the rapid deposition rate in West Chanel Estuary reduced theδ13 C in surface sediments from land to sea. And the material,transported from sub-tidal and enriched in inter-tidal,caused theδ13 C increasing in landward di-rection in west tidal flat of Yalu Estuary.