| 香港海域表层沉积物重金属空间分析 |
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| 引用本文： | 郝泽嘉,周 丰,郭怀成.香港海域表层沉积物重金属空间分析[J].环境科学研究,2008,21(6):110-117. |
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| 作者姓名： | 郝泽嘉 周 丰 郭怀成 |
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| 作者单位： | 1.北京大学 环境科学与工程学院, 北京 100871;中国科学院 研究生院, 北京 100049;中国科学院 地理科学与自然资源研究所 资源科学研究中心, 北京 100101 |
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| 基金项目： | 国家重点基础研究发展计划(973)项目，"水体污染控制与治理"国家科技重大专项 |
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| 摘 要： | 利用多元统计方法和空间内插值方法分析香港海域表层沉积物重金属的空间分布特征, 为优化香港沉积物重金属监测网络和控制香港地区重金属污染提供支持. 结果表明:①香港海域表层沉积物采样点在Dlink/Dmax<0.36处明显分为3类, 大致可分别代表轻度、中度、重度污染3种类型；②后退式判别分析具有良好的指标降维能力, 仅需6个显著性重金属指标(Zn, Pb, Cu, Cd, Fe和V)即可反映整个区域重金属空间分布差异性, 且具有84.50%的正确判别率；③基于GIS的反距离权重法(IDW)得到的显著性重金属指标的空间连续分布显示，V和Fe为B组采样点区域的特征元素, Zn, Pb, Cu和Cd在易受人类活动影响地区富集；④显著性指标富集因子的区域多项式内插模拟(LPI)显示，人类活动对Zn, Pb, Cu和Cd分布的强烈影响, 形成以长洲(SS7)、维多利亚湾、吐露港和后海湾为热点逐渐扩散的分布模式.
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| 关 键 词： | 重金属 沉积物 香港 空间分布 |
| 收稿时间： | 2008/1/28 0:00:00 |
| 修稿时间： | 2008/2/25 0:00:00 |
Spatial Analysis of Heavy Metals in Top Marine Sediment in Hong Kong |
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| HAO Ze-ji,ZHOU Feng and GUO Huai-cheng.Spatial Analysis of Heavy Metals in Top Marine Sediment in Hong Kong[J].Research of Environmental Sciences,2008,21(6):110-117. |
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| Authors: | HAO Ze-ji ZHOU Feng and GUO Huai-cheng |
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| Affiliation: | 1.College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Research Centre for Resources Science, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China2.College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China |
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| Abstract: | The spatial distribution features of metals in the surface sediments of the sea near Hong Kong were analyzed by the approach of multiple analysis and spatial interpolation, in order to provide data for optimizing the monitoring network of sediments and controlling heavy metal pollution in Hong Kong. The results indicated: ① The sampling points can be obviously classified into three types - little, moderate, and heavy - according to the degree of Dlink/Dmax<0.36. ②Backward stepwise mode DA had the advantage of variable dimension reduction, since only six significant variables of heavy metal (Zn, Pb, Cu, Cd, Fe and V) canbe used to reflect the spatial difference of heavy metals in the whole area; the precise correcting rate was 84.50%. ③The spatial continuous distribution of significant variables of heavy metal analyzed by IDW method based on GIS indicated that V and Fe were the characteristic elements in the B sampling area, while Zn, Pb, Cu and Cd were accumulated in the area that was affected by human activities. ④The LPI simulation of significant variable enrichment element indicated that the distribution of Zn, Pb, Cu and Cd were significantly affected by human activities, which diffused around Chang Zhou, Victoria Harbor, Tolo Harbour and Deep Bay. |
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| Keywords: | heavy metal sediment Hong Kong spatial distribution |
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