应用MODIS数据监测巢湖蓝藻水华的研究  

Application of MODIS Data for Monitoring Blue-green Algal Bloom in Chaohu Lake

作　　者：梅长青[1] 王心源[2] 彭鹏[2] 

机构地区：[1]安徽师范大学环境科学学院,安徽芜湖241003 [2]中国科学院-教育部-国家文物局遥感考古联合实验室安徽遥感考古工作站

出　　处：《遥感技术与应用》2008年第3期328-332,I0005,共6页Remote Sensing Technology and Application

基　　金：国家自然科学基金项目(40571162);安徽省自然科学基金项目(050450401)资助

摘　　要：以巢湖为研究区域,以MODIS卫星影像为数据源,结合准同步的地面水质监测数据,将MO-DIS250m分辨率的波段反射率与叶绿素a浓度实测值进行相关分析。在此基础上通过回归拟合,构建基于中分辨率成像光谱仪(MODIS)的叶绿素遥感提取模型。应用模型成功提取出蓝藻爆发水域chl-a的分布。从MODIS遥感图像上可以清晰地反映出巢湖这次蓝藻爆发的强度、地点和分布范围。研究结果表明:用MODIS影像监测巢湖蓝藻水华是可行的,其中250m分辨率波段1、2的比值组合r2/r1与叶绿素a浓度实测值高度相关(R=0.9093),适于反演叶绿素a浓度。Taking Chaohu Lake as an experimental site, unify the orbit water quality monitor data, using the simple regression and multivariate regression, the semi-empirical models for determinating chlorophyll-a concentration in Chaohu Lake are developed by relating the MODIS 250 meter resolution wave band combinations to chl-a measurements. Then,the distribution of blue-green algal bloom in Chaohu Lake is mapped. The intensity,place and distributed scope of this blue-green algae bloom reflected clearly. The results of this study show that MODIS image data is useful in Monitoring blue-green algal bloom in Chaohu Lake. The ratio of band 2 to band 1 （r2/r1） with 250m resolution is suitable to retrieve chl- a concentration because it is well related with chi-a measurements（R= 0. 9093）.

关 键 词：MODIS影像 巢湖 蓝藻水华 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]