Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016WR019729 |
Mixing as a driver of temporal variations in river hydrochemistry: 2. Major and trace element concentration dynamics in the Andes-Amazon transition | |
Baronas, J. Jotautas1; Torres, Mark A.1,2; Clark, Kathryn E.3; West, A. Joshua1 | |
2017-04-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Variations in riverine solute chemistry with changing runoff are used to interrogate catchment hydrology and to investigate chemical reactions in Earth's critical zone. This approach requires some understanding of how spatial and temporal averaging of solute-generating reactions affect the dissolved load of rivers and streams. In this study, we investigate the concentration-runoff (C-Q) dynamics of a suite of major (Na, Mg, Ca, Si, K, and SO4) and trace (Al, Ba, Cd, Co, Cr, Cu, Fe, Ge, Li, Mn, Mo, Nd, Ni, Rb, Sr, U, V, and Zn) elements in nested catchments of variable size, spanning the geomorphic gradient from the Andes Mountains to the Amazon Foreland-floodplain. The major elements exhibit various degrees of dilution with increasing runoff at all sites, whereas the concentrations of most trace elements either increase or show no relationship with increasing runoff in the three larger catchments (160-28,000 km(2) area). We show that the observed main stem C-Q dynamics are influenced by variable mixing of tributaries with distinct C-Q relationships. Trace element C-Q relationships are more variable among tributaries relative to major elements, which could be the result of variations in geomorphology, lithology, and hydrology of the subcatchments. Certain trace metals are also lost from solution during in-channel processes (possibly related to colloidal size-partitioning), which may exert an additional control on C-Q dynamics. Overall, we suggest that tributary aggregation effects should be assessed in heterogeneous catchments before C-Q or ratio-Q relationships can be interpreted as reflecting catchment-wide solute generation processes and their relationship to hydrology. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403682600035 |
WOS关键词 | CONCENTRATION-DISCHARGE RELATIONSHIPS ; CO2 CONSUMPTION ; RUNOFF ACIDIFICATION ; WEATHERING FLUXES ; MISSISSIPPI RIVER ; WATER CHEMISTRY ; CHEMICAL FLUXES ; ORGANIC-MATTER ; CARBON-CYCLE ; BASIN |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/22089 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Southern Calif, Dept Earth Sci, Los Angeles, CA 90089 USA; 2.CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA; 3.Univ Penn, Dept Earth & Environm Sci, Philadelphia, PA 19104 USA |
推荐引用方式 GB/T 7714 | Baronas, J. Jotautas,Torres, Mark A.,Clark, Kathryn E.,et al. Mixing as a driver of temporal variations in river hydrochemistry: 2. Major and trace element concentration dynamics in the Andes-Amazon transition[J]. WATER RESOURCES RESEARCH,2017,53(4). |
APA | Baronas, J. Jotautas,Torres, Mark A.,Clark, Kathryn E.,&West, A. Joshua.(2017).Mixing as a driver of temporal variations in river hydrochemistry: 2. Major and trace element concentration dynamics in the Andes-Amazon transition.WATER RESOURCES RESEARCH,53(4). |
MLA | Baronas, J. Jotautas,et al."Mixing as a driver of temporal variations in river hydrochemistry: 2. Major and trace element concentration dynamics in the Andes-Amazon transition".WATER RESOURCES RESEARCH 53.4(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论