基于波段定制高像素无人机多光谱相机的陆浑水库水质参数反演研究

Retrieval of Water Quality Parameters in Luhun Reservoir Using A UAV based High Pixel Multispectral Camera with Customized Bands

无人机载多光谱遥感在小型水体水环境监测中具有成本低、时间灵活等优势,但是常见的多光谱相机具有像素数量低、缺少内陆水体特征波段等问题,限制了无人机多光谱遥感在水环境监测中优势的发挥。针对这些问题,研究定制了面向内陆水体水质监测的高像素航天数维KP-8多光谱相机,相机包括面向内陆水体叶绿素a反演的670和700 nm波段;利用无人机飞行实验获取了浑浊富营养化的陆浑水库的多光谱影像,并利用同步水面实验获取的水质参数构建了典型水质参数透明度、浊度、悬浮物和叶绿素a浓度反演模型;将反演模型应用于多光谱影像,反演并分析了陆浑水库典型水质参数空间分布规律。结果表明:这种波段定制的高像素无人机多光谱相机在内陆水体水环境业务化监测方面具有重要潜力。

Unmanned Airborne Vehicle(UAV)based multispectral remote sensing has the advantages of low cost and flexible time in monitoring small water bodies.However,the common multispectral cameras have the problems of few pixels and lack of characteristic bands of inland water bodies,which limit the advantages of UAV based multispectral remote sensing in monitoring the water environment.In order to solve these prob-lems,this study customized the bands for inland water quality monitoring for the Aerospace ShuWei KP-8 mul-tispectral camera with high pixel,including 670 and 700 nm bands for inland water chlorophyll a retrieval;Then,a flight experiment was carried out to obtain the multispectral image of the turbid and eutrophic Luhun Reservoir.And the synchronously obtained water quality parameters from the water surface experiment were used to build the retrieval models of the typical water quality parameters,including the Secchi-disk depth,tur-bidity,suspended solids and chlorophyll a concentration;The retrieval models were applied to the multispectral image,and the typical water quality parameters in Luhun Reservoir were retrieved and their spatial distribution rules were analyzed.The results show that the UAV based high pixel multispectral camera has important poten-tial in the operational monitoring of inland water environment.