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首页> 外文期刊>Estuaries and Coasts >Airborne Laser-Induced Fluorescence (LIF) Light Detection and Ranging (LiDAR) for the Quantification of Dissolved Organic Matter Concentration in Natural Waters
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Airborne Laser-Induced Fluorescence (LIF) Light Detection and Ranging (LiDAR) for the Quantification of Dissolved Organic Matter Concentration in Natural Waters

机译：机载激光诱导荧光（LIF）光检测和测距（LiDAR）用于定量分析天然水中的溶解有机物浓度

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Analysis of dissolved organic matter (DOM) concentration and composition is essential to quantifying biological and chemical oxygen demand and atmosphere–ocean heat flux exchange in natural waters. However, manual water sampling is costly and time consuming over large areas. The purpose of this research was to analyze the applicability of airborne laser-induced fluorescence light detection and ranging (LiDAR) for the detection of DOM in estuarine ecosystems impacted by agriculture. A fluorescence LiDAR system (Airborne Marine) (FLS-AM) was used to assess the DOM concentration of the Annapolis River and Basin, Nova Scotia, Canada, as well as three rivers and their estuaries in Prince Edward Island, Canada. Two FLS-AM flight missions were conducted in the summers of 2008 and 2009 and the resulting datasets were compared with spectral fluorescence signature (SFS DOM) and dissolved organic carbon (DOC) analysis of in situ water samples. Significant positive correlations were found at five of seven sites between the FLS-AM DOM and SFS DOM relationship which indicates that the FLS-AM sensor is a good surrogate for traditional sample collection of DOM data in estuaries in this region. Positive correlations were also found at all sites between FLS-AM DOM values and DOC. FLS-AM DOM patterns show that DOM values are significantly higher in rivers and estuaries that drain watersheds which are heavily impacted by agricultural practices. The results of this study show that the FLS-AM can be used efficiently as a general indicator for how estuaries are affected by runoff from agricultural watersheds in real time and thus reduce the requirement for traditional water sample collection and laboratory analysis methods.
机译：溶解有机物（DOM）浓度和组成的分析对于量化自然水中生物和化学需氧量以及大气与海洋的热通量交换至关重要。但是，在大面积上进行手动水采样既昂贵又费时。这项研究的目的是分析机载激光诱导荧光检测和测距（LiDAR）在受农业影响的河口生态系统中检测DOM的适用性。荧光LiDAR系统（机载海洋）（FLS-AM）用于评估加拿大新斯科舍省安纳波利斯河和盆地以及加拿大爱德华王子岛的三条河流及其河口的DOM浓度。在2008年和2009年夏天进行了两次FLS-AM飞行任务，并将得到的数据集与现场水样的光谱荧光特征（SFS DOM）和溶解有机碳（DOC）分析进行了比较。在FLS-AM DOM和SFS DOM关系之间的七个位置中的五个位置发现显着正相关，这表明FLS-AM传感器是该地区河口中DOM数据的传统样本收集的良好替代。在FLS-AM DOM值和DOC之间的所有位置上也发现正相关。 FLS-AM DOM模式显示，在流域受到农业实践的严重影响的河流和河口中，DOM值明显更高。这项研究的结果表明，FLS-AM可以有效地用作农业流域径流如何实时影响河口的一般指标，从而减少了对传统水样收集和实验室分析方法的需求。

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