Spatial Distribution of Carbon, Nitrogen and Phosphorus within Surface Sediments in the Lower Lancang River: Pollution Assessment Related to Dams
Spatial Distribution of Carbon, Nitrogen and Phosphorus within Surface Sediments in the Lower Lancang River: Pollution Assessment Related to Dams
复制标题
澜沧江下游表层沉积物碳、氮、磷空间分布：与大坝相关的污染评估
DOI：
10.4236/jep.2018.913083
复制
发表时间：
2018-12
期刊：
影响因子：
--
通讯作者：
傅开道
中科院分区：
文献类型：
--
作者：
傅开道
表层沉积物是上覆水环境中营养盐的主要来源之一，也可以间接反映水体富营养化的程度。分析了澜沧江下游11个断面汛期表层沉积物中总有机碳（TOC）、总氮（TN）和总磷（TP）的空间分布特征，以及不同形态磷的分布。探讨了表层沉积物TOC的主要来源及其与TN、TP的相关性，并对表层沉积物的污染程度进行了评价。结果表明，澜沧江下游表层沉积物TOC平均含量为9003.75mg/kg; TN平均含量为893.79 mg/kg，TP平均含量为521.35 mg/kg。澜沧江下游表层沉积物中TOC主要来源于藻类和浮游生物，TN和TP的来源相似。澜沧江下游表层沉积物中总磷主要以钙结合态磷（Ca-P）为主。有机污染指数和综合污染指数评价结果表明，糯扎渡和景洪两坝上游表层沉积物污染程度较坝下严重。此外，除勐养河被视为中度污染外，其他支流均为轻度污染。
Surface sediment is one of the main sources of nutrients in overlying water environments, and these can also indirectly reflect the degree of eutrophication. In this paper, the spatial distribution characteristics of total organic carbon (TOC), total nitrogen (TN) and total phosphorus (TP) in the surface sediments of 11 sections in the lower Lancang River during flood season are analyzed, as well as the distribution of phosphorus in different forms. The main sources of TOC and its correlation with TN and TP are discussed and, finally, the pollution levels of the surface sediments are evaluated. The results show that the average content of TOC in the surface sediments of the lower Lancang River is 9003.75 mg/kg. The average TN content is 893.79 mg/kg, while the average TP content is 521.35 mg/kg. The TOC in the surface sediments of the lower Lancang River is derived mainly from algae and plankton in the river, and the TN and TP have similar sources. The total phosphorus in the surface sediments of the lower Lancang River is composed mainly of calcium-bound phosphorus (Ca-P). The evaluations of the organic pollution index and comprehensive pollution index show that the surface sediment pollution degree at the upper sections of the Nuozhadu and Jinghong Dams are more serious than those below the dams. Furthermore, the tributary sections are all slightly polluted, with the exception of the Mengyang River, which is considered moderately polluted.
登录
查看更多内容
影响因子：
5
作者：
Filippelli, GM;Delaney, ML
通讯作者：
Delaney, ML
DOI：
10.18307/2009.0502
发表时间：
2009
期刊：
Journal of Lake Sciences
影响因子：
--
作者：
Xiangbin Ran;Zhigang Yu;Qingzhen Yao;Hong-tao Chen;Tie-zhu Mi;Yao Peng
通讯作者：
Xiangbin Ran;Zhigang Yu;Qingzhen Yao;Hong-tao Chen;Tie-zhu Mi;Yao Peng
影响因子：
6.2
作者：
M. Varol
通讯作者：
M. Varol
DOI：
--
发表时间：
2012
期刊：
China Environmental Science
影响因子：
--
作者：
Jin Xiangcan
通讯作者：
Jin Xiangcan
影响因子：
--
作者：
Yue Wei
通讯作者：
Yue Wei