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首页> 外文期刊>American Water Works Association Journal >Spectral evaluation of watershed DOM and DBP precursors
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Spectral evaluation of watershed DOM and DBP precursors

机译：分水岭DOM和DBP前体的光谱评估

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摘要

Dissolved organic matter (DOM) quantity and character from eight locations, including rivers and managed-flow sites, within two northern Colorado Rocky Mountain watersheds were examined using fluorescence and absor-bance spectroscopy to characterize changes in DOM quantity and quality. River sites exhibited strong seasonal variability, containing higher concentrations of more aromatic DOM during spring runoff. Reservoir-influenced, managed sites had year-round stability and had less aromatic DOM compared with the river sites. Total trihalomethane formation potential (TTHMFP) was used as a measure of DOM chlorine reactivity. Fluorescence compositional metrics (fluorescence index [FI] and organic matter fluorescence characterization [Peak C]/ultraviolet absorbance at 340 nm ratios) correlated with TTHMFP yields. River sites showed increased TTHMFP concentrations during runoff but little change in TTHMFP yield. Managed sites showed little seasonal variation in both TTHMFP and TTHMFP yield. The results show that fluorescence parameters provide additional information on DOM character not available from conventional measures and may be useful in facilitating watershed management and treatment decisions.
机译：利用荧光和吸收-吸收光谱法研究了科罗拉多州洛矶山脉北部两个流域内八个地点（包括河流和受控流场）的溶解有机物（DOM）的数量和特征，以表征DOM数量和质量的变化。河流站点表现出强烈的季节性变化，在春季径流期间包含较高浓度的更多芳香DOM。与河流站点相比，受水库影响的受管理站点具有全年稳定性，并且具有较少的芳香DOM。总三卤甲烷形成潜能（TTHMFP）被用作DOM氯反应性的量度。与TTHMFP产量相关的荧光成分量度（荧光指数[FI]和有机物荧光特征[峰C] /在340 nm处的紫外线吸收）。河流站点显示径流期间TTHMFP浓度增加，但TTHMFP产量变化不大。受管理的站点在TTHMFP和TTHMFP产量方面几乎没有季节性变化。结果表明，荧光参数可提供常规方法所无法提供的有关DOM特性的附加信息，并且可能有助于流域管理和处理决策。

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