Phosphorus Fluxes at the Sediment-Water Interface in a Temperate Region Agricultural Catchment
文献类型：期刊论文
| 作者 | Su, Jingjun ; van Bochove, Eric ; Auclair, Jean-Christian ; Theriault, Georges ; Hu, Chengxiao ; Li, Xuyong |
| 刊名 | WATER AIR AND SOIL POLLUTION
 |
| 出版日期 | 2014 |
| 卷号 | 225期号:1页码:- |
| 关键词 | Phosphorus Source Groundwater Sediment-water interface |
| ISSN号 | 0049-6979 |
| 中文摘要 | Phosphorus (P) release and flux at sediment-water interface was hypothesized to vary with studied catchment branches due to differences in water chemistry of recharging groundwater. Stream water, seepage water, groundwater, and resurgence groundwater were collected, and their dissolved reactive P (DRP) concentrations and related water chemistry variables (pH, dissolved oxygen, cations, and anions) were measured to identify P sources in seepage water and resurgence groundwater and to look into their impacts on stream water DRP. Results showed that the groundwater-carried P concentrations were negligible, and, thus, not a direct source of DRP to stream water. However, the upwelling groundwater could contribute to stream water DRP by dissolving calcite-bound P in top sediments of branch 15. The seepage experiment indicated that in branch14, sediment release of reducible P was minimal. Furthermore, the presence of impermeable clay layer over the streambed of branch 14 prevented the transport of water and nutrients from beneath sediments to stream water, further reducing the P flux across the sediment-water interface. This study revealed that in branch 14, the recharge of anoxic groundwater did not significantly influence stream water P, due directly to its low P concentration, or indirectly to the lack of reducible P and the poor hydrological connectivity in bottom sediments. These results showed that differences between P soluble concentrations in small catchment streams can be explained by physicochemical processes at the sediment-water interface. More investigation is needed to assess whole catchment P dynamics. |
| WOS记录号 | WOS:000329637600002 |
| 公开日期 | 2015-03-23 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/9205]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Su, Jingjun,van Bochove, Eric,Auclair, Jean-Christian,et al. Phosphorus Fluxes at the Sediment-Water Interface in a Temperate Region Agricultural Catchment[J]. WATER AIR AND SOIL POLLUTION,2014,225(1):-. |
| APA | Su, Jingjun,van Bochove, Eric,Auclair, Jean-Christian,Theriault, Georges,Hu, Chengxiao,&Li, Xuyong.(2014).Phosphorus Fluxes at the Sediment-Water Interface in a Temperate Region Agricultural Catchment.WATER AIR AND SOIL POLLUTION,225(1),-. |
| MLA | Su, Jingjun,et al."Phosphorus Fluxes at the Sediment-Water Interface in a Temperate Region Agricultural Catchment".WATER AIR AND SOIL POLLUTION 225.1(2014):-. |
入库方式： OAI收割
来源：生态环境研究中心
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