| SHI Yong,LIU Zhishuai,GAO Jianhua,YANG Yang,WANG Yaping. 2017. The response of sedimentary record to catchment changesinduced by human activities in the western intertidal flat ofYalu River Estuary, China. Acta Oceanologica Sinica, 36(4):54－63 |
| The response of sedimentary record to catchment changesinduced by human activities in the western intertidal flat ofYalu River Estuary, China |
| 鸭绿江河口西岸潮滩沉积对流域人类活动的响应 |
| Received:December 19, 2015 Revised:May 05, 2016 |
| DOI：10.1007/s13131-016-0941-7 |
| Key words:runoff and sediment load human activities sediment record sensitive component Yalu River |
| 中文关键词: 径流量 输沙量 人类活动 沉积记录 敏感组分 鸭绿江 |
| 基金项目: |
| Author Name | Affiliation | E-mail | | SHI Yong | National Ocean Technology Center, Tianjin 300111, China
Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing 210093, China | | | LIU Zhishuai | National Ocean Technology Center, Tianjin 300111, China
Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing 210093, China | | | GAO Jianhua | Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing 210093, China | jhgao@nju.edu.cn | | YANG Yang | Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing 210093, China | | | WANG Yaping | Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing 210093, China | |
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| Abstract: |
| The response to the catchment changes of the sedimentary environment of the western intertidal flat of Yalu River Estuary was investigated by analyzing the vertical variations of the grain size of sediment cores, along with the hydrologic data and human activities in the catchment. The results demonstrated a stepwise decreasing trend for the variations of both the sediment load and water discharge into the sea, which could be divided into three stages as 1958-1970, 1971-1990 and 1991-2009. Reservoir construction and the changes of catchment vegetation coverage turned out to be the two predominant contributors to the changes. There are four periods for the variation of the sensitive components of the sediment cores from 1940 to 2010, i.e., 1940-1950, 1951-1980, 1981-1990 and 1991-2010. The vertical distribution of grain size in the cores mainly varied with the changes of vegetation coverage in the catchment and reservoir construction from 1960 to 1980, whereas it varied depending on the intensity of water and soil erosion in the catchment from 1980 to 1990. Despite the further reduction of the water and sediment input into the sea from 1990 to 2009, this period was characterized by coarsening trends for the grain size of sediment in the estuarine intertidal flat and correspondingly, the significantly increased silt contents of the sensitive component. |
| 中文摘要: |
| 对潮滩柱状沉积物粒度的垂向分布进行分析，结合流域水文资料和人类活动，可得出鸭绿江河口西岸潮滩沉积环境如何响应流域变化。可获取年份的水文资料显示：鸭绿江入海输沙量及径流量呈阶段性减小，可划分为1958-1970、1971-1990和1991-2009三个阶段，流域水库建设及植被覆盖率是其主控因素。1940-2010年间的柱状沉积物中敏感组分的变化可分为四个时期：1940-1950、1951-1980、1981-1990和1991-2010。潮滩沉积物的垂向粒径变化在1960-1980年间主要受流域植被覆盖率及水库建设控制，而1981-1990年间则与降雨量及土壤侵蚀强度直接相关。1990-2009年间入海径流量及输沙量的进一步减少，导致河口潮间带沉积物的粒径逐渐增大，及敏感组分中泥质成分含量的增加。 |
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