| 分离悬浮质影响的光学波段(400—900 nm)水吸收系数测量 |
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| 引用本文： | 邓孺孺,何颖清,秦雁,陈启东,陈蕾.分离悬浮质影响的光学波段(400—900 nm)水吸收系数测量[J].遥感学报,2012,16(1):174-191. |
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| 作者姓名： | 邓孺孺 何颖清 秦雁 陈启东 陈蕾 |
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| 作者单位： | 中山大学 地理科学与规划学院，广东 广州 510275;中山大学 地理科学与规划学院，广东 广州 510275;中山大学 地理科学与规划学院，广东 广州 510275;中山大学 地理科学与规划学院，广东 广州 510275;中山大学 地理科学与规划学院，广东 广州 510275 |
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| 基金项目： | 国家自然科学基金(编号: 40671144)；国家高技术研究发展计划(863计划) (编号: 2006AA06Z416)；引进国际先进农业科学技术计划 (948项目) (编号: 200820) |
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| 摘 要： | 设计了一套采用较直接方式测量水吸收系数的新装置。通过测量直射光穿透不同厚度水层后的辐照度，采用比值法消除了测量仪器对实验结果的影响并得到水层的消光系数；通过混浊水消光实验，证明悬浮物消光系数可由 ?ngstrom公式计算，并提出消除水中悬浮杂质影响的方法。最终得到纯水在400—900 nm波段的吸收系数。所得结果与主流的前人测量成果较为相符，在较长波段具有更好的精度，可作为水质遥感的基础数据。
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| 关 键 词： | 吸收系数 纯水 悬浮杂质 消光系数 |
| 收稿时间： | 2011/7/11 0:00:00 |
| 修稿时间： | 2011/9/21 0:00:00 |
Pure water absorption coefficient measurement after eliminating the impact of suspended substance in spectrum from 400 nm to 900 nm |
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| DENG Ruru,HE Yingqing,QIN Yan,CHEN Qidong and CHEN Lei.Pure water absorption coefficient measurement after eliminating the impact of suspended substance in spectrum from 400 nm to 900 nm[J].Journal of Remote Sensing,2012,16(1):174-191. |
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| Authors: | DENG Ruru HE Yingqing QIN Yan CHEN Qidong and CHEN Lei |
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| Institution: | School of Geography and Planning, Centre for Remote Sensing and Geographical Information Sciences, Sun Yat-sen University, Guangzhou 510275, China;School of Geography and Planning, Centre for Remote Sensing and Geographical Information Sciences, Sun Yat-sen University, Guangzhou 510275, China;School of Geography and Planning, Centre for Remote Sensing and Geographical Information Sciences, Sun Yat-sen University, Guangzhou 510275, China;School of Geography and Planning, Centre for Remote Sensing and Geographical Information Sciences, Sun Yat-sen University, Guangzhou 510275, China;School of Geography and Planning, Centre for Remote Sensing and Geographical Information Sciences, Sun Yat-sen University, Guangzhou 510275, China |
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| Abstract: | We designed a new device which can be used to measure the absorption coefficient of pure water directly. First, we measured the irradiance of direct light penetrating through different thicknesses of water layers. Then we used the ratio method to eliminate the impact of measuring instruments on experimental results. Finally, we acquired the extinction coefficient. The extinction coefficient experiment proved that extinction coefficient of suspended substance in water can be calculated by formula of ?ngstrom. We therefore put forward a method on how to eliminate the impact of suspended substance in pure waters. Eventually, we determined the absorption coefficient of pure water from 400 nm to 900 nm. Comparing with previous studies, overall results are consistent, but with better precision in the long wave length. The absorption coefficient of pure water can be used as the normal data for water quality remote sensing. |
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| Keywords: | absorption coefficient pure water suspended substance extinction coefficient |
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