• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Erosion and sediment yields in the changing environment >Sediment quality in the water-level-fluctuation-zone of the Three Gorges Reservoir, China
【24h】

Sediment quality in the water-level-fluctuation-zone of the Three Gorges Reservoir, China

机译：中国三峡水库水位波动区泥沙质量

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The water-level-fluctuation-zone (WLFZ) of the Three Gorges Reservoir (TGR) acts as an important area for sediment and associated contaminants deposition and remobilization. Knowledge of sediment quality in the WLFZ of the TGR plays an important role in evaluating geochemical baselines and understanding human influences on sediment geochemistry. When the water level of the TGR was low in summer 2010, sediment samples in the WLFZ were collected for the determination of heavy metals (Pb, Cr, Cu, Zn, Cd), and nutrients (TP, OM). Generally, concentrations of TP and heavy metals, except for Zn, in most of the sediment samples exceeded the Lowest Effect Levels, and the maximum concentrations of these elements were below the Severe Effect Levels. The results indicated the sediments were contaminated by Cu, Cd, Pb, Cr and phosphorus to some extent. In the sediment profiles, higher concentrations of Pb, Cr, Cu, Cd and TP were associated with subsurface sediment rather than surface material. In contrast to the nutrients, the generally higher concentration of heavy metals, except for Zn, in the bulk sediments appeared in the lowland at lower elevations rather than the higher elevation sloping land. Many of the spatial trends for heavy metals and nutrients were explained by the element properties, particle-size-selective deposition and post-depositional remobilization. As sensitive indicators of contaminants in aquatic systems, the heavy metals and nutrients in the sediments in the WLFZ reflect human activities in the TGR region and have implications for environmental management.
机译：三峡水库（TGR）的水位波动区（WLFZ）是沉积物及相关污染物沉积和迁移的重要区域。 TGR的WLFZ中的沉积物质量知识在评估地球化学基线和了解人类对沉积物地球化学的影响方面起着重要作用。当2010年夏季TGR的水位较低时，在WLFZ中收集了沉积物样品，用于测定重金属（Pb，Cr，Cu，Zn，Cd）和养分（TP，OM）。通常，大多数沉积物样品中除锌外的TP和重金属的浓度均超过最低影响水平，而这些元素的最大浓度也低于严重影响水平。结果表明，沉积物受到一定程度的铜，镉，铅，铬和磷污染。在沉积物剖面中，较高浓度的Pb，Cr，Cu，Cd和TP与地下沉积物有关，而不是与表面物质有关。与养分相反，散装沉积物中除锌外，重金属的浓度通常较高，而低海拔地区则出现在低地，而不是高海拔地区。重金属和养分的许多空间趋势可以通过元素性质，粒度选择性沉积和沉积后迁移来解释。作为水生系统中污染物的敏感指标，WLFZ沉积物中的重金属和养分反映了TGR地区的人类活动，对环境管理产生了影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号