| 三峡水库156 m蓄水后典型库湾溶解态重金属分布特征研究 |
| Distribution of Dissolved Heavy Metals in the Typical Backwater Regions of the Three Gorges Reseroir |
| 投稿时间：2009-01-08 |
| DOI： |
| 中文关键词:三峡水库 库湾 重金属 |
| 英文关键词:Three Gorges Reservoir backwater regions heavy metals |
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| 中文摘要: |
| 为研究三峡水库１５６ｍ蓄水后库湾中重金属的分布特征，２００７年４月在三峡水库典型库湾（香溪河库湾和大宁河库湾）及其毗邻干流开展了现场调查，测定了溶解态重金属铜、铅、铁和镉的含量。结果表明：２００７年４月三峡水库１５６ｍ蓄水后，其典型库湾（香溪河库湾和大宁河库湾）水体中溶解态重金属含量铅最高，铜、铁次之，镉最低。香溪河库湾和大宁河库湾中各溶解态重金属具有较为一致的分布规律；干、支流水体中溶解态铜的平均浓度相差较大，香溪河库湾、大宁河库湾平均浓度均低于与其毗邻干流；两库湾水体中溶解态铅的平均浓度略低于其毗邻干流的，但差别不大；干、支流水体中溶解态铁、镉的平均浓度基本一致。两库湾中各溶解态重金属的平均浓度相差不大。与蓄水前和１３５ｍ蓄水后的历史数据相比较，三峡水库１５６ｍ蓄水后，干流和香溪河库湾溶解态铜、铅和镉的浓度都呈升高趋势，也显著高于长江干流其他水域，表明水库蓄水对区域痕量重金属的生物地球化学循环存在一定影响。
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| 英文摘要: |
| Dissolved heavy metals Cu, Pb, Fe and Cd in the typical backwater regions （Xiangxi River and Daning River） of the Three Gorges Reservoir （TGR） were determined in April 2007 to research their distribution characteristic after 156m impoundment of TGR. The results indicated that, during April 2007, the dissolved Pb is highest on the average, Cu and Fe are lower, and Cd is lowest in the water column after 156m impoundment of TGR. Distributions of dissolved heavy metals are the same basically between Xiangxi River and Daning River. The mean values of dissolved Cu in Xiangxi River and Daning River are significantly lower than those in the main stream. The averages of dissolved Pb in branches are slightly lower than those in the main stream. And the averages of dissolved Fe and Cd in branches are almost the same to those of the main stream. The mean values of dissolved heavy metals have no significant difference between Xiangxi River and Daning River. Comparing with the previous （before impoundment and after 135m impoundment） data, the concentrations of dissolved Cu, Pb and Cd are higher in both main stream and Xiangxi River after 156m impoundment of TGR, and they are higher than other areas of the Changjiang stream. This means that the impoundment of reservoirs can impact the region biogeochemistry cycle of trace elements. |
| 赵军,于志刚,陈洪涛,冉祥滨,姚庆祯,米铁柱.2009.三峡水库156 m蓄水后典型库湾溶解态重金属分布特征研究[J].水生态学杂志,30(2):9-14. |
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