【摘要】 借鉴陆地植被指数的算法,利用MODIS数据的波段组合对太湖叶绿素a浓度进行反演。探讨了差值植被指数DVI、比值植被指数RVI、归一化植被指数NDVI这三种遥感指数形式的反演效果及各自特点。MODIS数据蓝光波段和红外波段的组合是反演太湖叶绿素浓度的最佳波段组合,DVI适合于反演叶绿素浓度高的情况,RVI的反演结果两极分化明显而普适性较差,NDVI适合于反演浓度较低的情况。更多还原

【Abstract】 Using the arithmetic of land vegetation index for reference,the chlorophyll-a concentration of lakes is retrieved by band combination of MODIS image data.The retrieve results and characteristics of three remote sensing indices which are Difference Vegetation Index(DVI),Ratio Vegetation Index(RVI) and Normalized Difference Vegetation Index(NDVI) are discussed.The combination of blue band and infrared band is the best in retrieving chlorophyll-a concentration in Taihu Lake.The DVI is well to retrieve high chlorophyll-a concentration,the retrieve result of RVI is polarized and not so universal,and the NDVI is applicable in the situation of low concentration.更多还原