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《中国工程科学》 >> 2010年 第12卷 第6期

通过DOM的光谱特性对长江源头典型高原深水湖泊进行评价

贵州师范大学省山地环境信息系统与生态环境保护重点实验室,贵阳 550001

资助项目 :贵州省教育厅自然科学研究重点项目(2005106);贵州省科技厅对外合作项目([2007]400126);贵州省高级人才特助经费(TZJF-2006-27) 收稿日期: 2009-12-20 发布日期: 2010-06-13 13:15:11.000

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摘要

天然溶解有机质(dissolved organic matter, DOM)研究在水体生态环境系统的修复研究中扮演着重要的角色,是近年来水环境研究领域的一个热点和难点。目前,紫外―可见光谱和分子荧光光谱在天然溶解有机质是表征天然溶解有机质的重要有效的手段,也是研究天然溶解有机质的主要手段。红枫湖为贵阳市5 个主要饮用水源地之一,对贵阳市社会发展具有重要作用。采用紫外―可见光谱和分子荧光光谱相结合的研究方法,对采自红枫湖中10个点的水样中天然溶解有机质的光谱特性研究。研究结果表明,红枫湖水体光谱特征主要表现为紫外―可见吸光值参数 E3/E4的变化范围是1.70~8.77。除后五火电厂外,水下10 m比水下5 m的 E3/E4 值要高。此外,荧光指数 f 450/500 的变化范围是1.38~1.52。初步认为红枫湖目前的主要有机物污染是陆源性的。后五火电厂,北湖湖心和张官三点水样的光谱特征与其他地方不同。同时还表明溶解有机质的腐殖化程度与水深具有一定的相关性。

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参考文献

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