| 基于泥沙中碳含量的变化表征黄河调水调沙入海泥沙的扩散范围 |
| |
| 引用本文： | 张龙军,姜波,张向上,刘建栋.基于泥沙中碳含量的变化表征黄河调水调沙入海泥沙的扩散范围[J].水科学进展,2008,19(2):153-159. |
| |
| 作者姓名： | 张龙军 姜波 张向上 刘建栋 |
| |
| 作者单位： | 1.中国海洋大学海洋环境与生态教育部重点实验室, 山东, 青岛, 266100; |
| |
| 基金项目： | 国家自然科学基金
,
国家重点基础研究发展计划(973计划) |
| |
| 摘 要： | 主要通过黄河口悬浮物中有机碳和无机碳的含量,表征黄河调水调沙入海的泥沙在黄河口外近海的扩散范围。结果表明:黄河口入海前泥沙中的颗粒无机碳(PIC),颗粒有机碳(POC)具有稳定性,分别为(1.75×0.28)%和(0.51×0.08)%;在悬浮物含量约为30 mg/L时,黄河口临近海区悬浮物中的PIC、POC含量分别出现突跃性降低和升高趋势,叶绿素分析表明,POC含量的升高是由于浮游植物对颗粒有机碳贡献的结果,同时正构烷烃轻重比值ΣC20-/ΣC20+和碳优势指数(CPI)值也分别增加和降低;X衍射发现悬浮物浓度低于30 mg/L时,黄河泥沙在悬浮物中所占比例迅速下降,从而造成悬浮物中PIC突跃性下降;因此,黄河口近海悬浮物含量30 mg/L可以被认为是陆源和海源颗粒物对黄河口近海区悬浮物贡献的有效分界线。调水调沙入海的泥沙在黄河口外近海表层主要扩散到河口以南海域,而底层扩散范围主要集中在河口以北和河口以南海域,这些泥沙最终可能停留在莱州湾中部。
|
| 关 键 词： | 黄河 调水调沙 碳含量 入海泥沙 扩散范围 |
| 文章编号： | 1001-6791(2008)02-0153-07 |
| 收稿时间： | 2007-03-16 |
| 修稿时间： | 2007年3月16日 |
Study of carbon content tracing sediment diffusion bound after water-sediment regulation in the Yellow River estuary |
| |
| ZHANG Long-jun,JIANG Bo,ZHANG Xiang-shang,LIU Jian-dong.Study of carbon content tracing sediment diffusion bound after water-sediment regulation in the Yellow River estuary[J].Advances in Water Science,2008,19(2):153-159. |
| |
| Authors: | ZHANG Long-jun JIANG Bo ZHANG Xiang-shang LIU Jian-dong |
| |
| Institution: | 1.Key Lab. of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China;2.Qingdao Municipal Science and Technology Commission, Qingdao 266071, China |
| |
| Abstract: | The particulate organic carbon content(POC)and particulate inorganic carbon content(PIC)in total suspended solid(TSS)are used to trace sediments diffusion bound in Bohai after the fourth test of water-sediment regulation of the Yellow River,the result indicates that POC and PIC in sediment are both stable with season changing,their mean content are(1.75×0.28)% and(0.51×0.08)% respectively.When TSS concentration is below 30 mg/L,PIC in TSS decrease swiftly to 0, whereas POC in TSS increase promptly.According to the analysis of chlorophyll-a and mineral in TSS,when TSS is less than 30 mg/L,phytoplankton increases,but the sediment from the Yellow River decreases in TSS.Simultaneously,ΣC20-/ΣC20+ and carbon proponderance index(CPI)of n-alkane increase and decrease obviously.TSS=30 mg/L can be regarded as the effective boundary between the allochthonous TSS and autochthonous TSS.The sediment from the fourth test of water-sediment regulation of the Yellow River diffuses to southern river-mouth at surface layer;While at bottom layer,sediments diffusion range concentrates at northern and southern river-mouth of the Yellow River.the central section of Laizhou bay is likely to be the habitation of sediment from the fourth test of water-sediment regulation of the Yellow River. |
| |
| Keywords: | |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《水科学进展》浏览原始摘要信息 |
| 点击此处可从《水科学进展》下载免费的PDF全文 |
|
