通过定点监测相对绿度指数获得水体藻类生长动态的方法  

A Method for Monitoring Algae Status in Water Bodies Based on Green Chromatic Coordinate

作　　者：张文庆 肖薇[1,2] 曹畅[1,3] 张弥 王伟[1] 王怡[1] 王娇 陈争 蒲旖旎 ZHANG Wen-qing;XIAO Wei;CAO Chang;ZHANG Mi;WANG Wei;WANG Yi;WANG Jiao;CHEN Zheng;PU Yi-ni(Yale-NUIST Center on Atmospheric Environment,Nanjing University of Information Science&Technology,Nanjing 210044,China;Collaborative Innovation Center on Evaluation of Meteorological Disasters,Nanjing University of Information Science&Technology,Nanjing 210044,China;Wuxi Research Institute,Nanjing University of Information Science&Technology,Wuxi 214105,China;Binjiang Institute,Nanjing University of Information Science&Technology,Wuxi 214105,China)

机构地区：[1]南京信息工程大学大气环境中心,南京210044 [2]南京信息工程大学气象灾害预报预警与评估协同创新中心,南京210044 [3]南京信息工程大学无锡研究院,无锡214105 [4]南京信息工程大学滨江学院,无锡214105

出　　处：《科学技术与工程》2020年第19期7609-7616,共8页Science Technology and Engineering

基　　金：国家自然科学(41975143,41575147);江苏省自然科学基金青年基金(BK20180796)。

摘　　要：富营养化是中国内陆水体面临的普遍问题,相机拍照是一个监测水体的有效技术手段。提出采用RGB相机定点观测水体相对绿度指数(gcc)用以指示藻类生长动态的新方法。于夏、秋、冬三个季节共41 d在安徽全椒的两个小型水体(沟渠和池塘)上用RGB相机进行了监测,研究gcc的时空变化特征,分析其影响因素,探讨相机设置、校准和数据处理方法。结果表明:①晴天条件下gcc波动幅度明显大于阴天和多云条件,太阳高度角大于40°时gcc更加稳定,选取正午时段的平均值能有效去除太阳高度角变化带来的干扰;②gcc变化序列符合实际藻类的演变动态,可以作为表征水体藻类物候的特征指数;③夏季gcc的平均水平显著高于秋季和冬季;④两个水体gcc的范围位于陆地生态系统gcc的变化范围之内。研究结果能为水体藻类动态监测及相关研究提供技术支撑和数据参考。Eutrophication in inland water bodies is a common problem in China, and camera photography is an effective technical method to monitor water bodies. A new method using RGB camera was proposed to observe gcc and to indicate the growth dynamics of algae in water bodies. During three campaigns in summer, autumn and winter for totally 41 days, the RGB camera was used to monitor the temporal and spatial variation of gcc in two small water bodies(a ditch and a pond) in Quanjiao, Chuzhou, Anhui Province. The influencing factors on gcc were analyzed, and the setting, calibration and data-processing procedures were discussed. The main results show that the variability of gcc under clear sky conditions is higher than those under cloudy and overcast conditions. The variation of gcc with solar altitude higher than 40° is more stable, the mean value during midday can remove the interruption of solar altitude variation. Meanwhile, time series of gcc is consistent with the evolution of actual algae, so the factor can be used as a feature index to characterize the phenology of algae in water bodies. And the average level in summer is significantly higher than that in autumn and winter. Moreover, the magnitude of gcc in the two water bodies falls in the range of those of terrestrial ecosystems. Technique support and data reference can be provided for monitoring and investigating the algae dynamic in water bodies.

关 键 词：RGB相机 水体 藻类 相对绿度指数 太阳高度角 

分 类 号：Q948.8[生物学—植物学]