| 基于Landsat 8 OLI影像反演的湖北大冶湖水体光学衰减特性 |
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| 引用本文： | 任伟祥,吴晓东,聂洪峰,肖春蕾,葛绪广,杨久芸,罗璐.基于Landsat 8 OLI影像反演的湖北大冶湖水体光学衰减特性[J].湖泊科学,2022,34(3):791-803. |
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| 作者姓名： | 任伟祥 吴晓东 聂洪峰 肖春蕾 葛绪广 杨久芸 罗璐 |
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| 作者单位： | 中国自然资源航空物探遥感中心,北京100083;中国地质大学(北京),北京100083;中国地质科学院,北京100037,湖北师范大学城市与环境学院,黄石435002,中国自然资源航空物探遥感中心,北京100083 |
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| 基金项目： | 全国地球关键带遥感地质调查项目（DD20190536）和湖北省大学生创新训练计划项目（S202010513027，S202010513064）联合资助. |
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| 摘 要： | 水体光学衰减特性直接影响湖泊的清澈程度和沉水植被的生存，利用遥感技术获取湖泊光学衰减分布特性能极大提高效率.基于2017—2019年的原位调查数据，利用Landsat 8 OLI影像开发了大冶湖水体光学衰减系数（Kd）的遥感反演模型，并分析大冶湖水体Kd的多年时空分布特性与驱动机制，以期为大冶湖流域的修复与管理提供参考.结果表明：波段比二次模型Kd=9.61（B1/B4）2-2.41（B1/B4）-6.40效果最好，精度达到R2=0.79，MAPE=23.9%，RMSE=0.89 m-1.大冶湖水体Kd值的主要影响因素为悬浮物和浊度等，其次为有色溶解性有机物和叶绿素a.大冶湖Kd值分布在空间上由西向东逐渐递减，但局部也受到风速、陆源输入、人为活动和微生物活动等的影响，季节上平均以夏季最高、冬季最低.2013年以来大冶湖水体Kd值整体呈现下降趋势.
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| 关 键 词： | 大冶湖 光合有效辐射 光学衰减系数 遥感 Landsat 8 |
| 收稿时间： | 2021/8/11 0:00:00 |
| 修稿时间： | 2021/9/22 0:00:00 |
Optical attenuation characteristics of Lake Daye, Hubei Province based on remote sensing inversion of Landsat 8 OLI |
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| Ren Weixiang,Wu Xiaodong,Nie Hongfeng,Xiao Chunlei,Ge Xuguang,Yang Jiuyun,Luo Lu.Optical attenuation characteristics of Lake Daye, Hubei Province based on remote sensing inversion of Landsat 8 OLI[J].Journal of Lake Science,2022,34(3):791-803. |
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| Authors: | Ren Weixiang Wu Xiaodong Nie Hongfeng Xiao Chunlei Ge Xuguang Yang Jiuyun Luo Lu |
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| Institution: | China Aero Geophysical Survey &Remote Sensing Center for Natural Resources, Beijing 100083, P. R. China;China University of Geosciences, Beijing 100083, P. R. China;Chinese Academy of Geological Sciences, Beijing 100037, P. R. China;College of Urban and Environmental Sciences, Hubei Normal University, Huangshi 435002, P. R. China |
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| Abstract: | The optical attenuation characteristics of water directly affect the clarity of lake and the survival of submerged macrophytes. Using the way of remote sensing to obtain the optical attenuation distribution characteristics of lakes can greatly improve the efficiency. Lake Daye, located in Huangshi City, Hubei Province, is a typical shallow lake in the middle reaches of the Changjiang (Yangtze) River. Based on the in-situ survey data from 2017 to 2019, the remote sensing inversion model of Lake Daye water optical attenuation coefficient (Kd) is developed by using Landsat 8 OLI images, and the multi-year temporal and spatial distribution characteristics and driving mechanism of Kd in Lake Daye are analyzed, so as to provide reference for the restoration and management of Lake Daye basin. The results show that:the band ratio quadratic model was the best model (Kd=9.61 (B1/B4) 2-2.41 (B1/B4) -6.40), and its accuracy was R2=0.79, MAPE=23.9%, RMSE=0.89 m-1. The main influencing factors of Kd of Lake Daye were suspended solids and turbidity, followed by chromophoric dissolved organic matter and chlorophyll-a. Moreover, the Kd value of Lake Daye decreased gradually from west to east in space, but it was also affected by wind speed, land-based input, human activities and microbial activities in some parts. The average of Kd is highest in summer and lowest in winter. Since 2013, the Kd value of Lake Daye has shown an overall downward trend. |
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| Keywords: | Lake Daye|photosynthetically active radiation|optical attenuation coefficient|remote sensing|Landsat 8 |
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