A study was performed on a 32 Km stretch of the River Hooghly as part of a project under the Airborne Visible Infrared Imaging Spectrometer - Next Generation (AVIRIS-NG) scheme between Indian Space Research Organization (ISRO) and National Aeronautics and Space Administration (NASA). It was governed by 33 water quality variables comprising physical, chemical, biological and ecological ones. The selected stations were within the tidal realm of the estuary, constituting the lower-middle stretch of the river that was severely affected by anthropogenic perturbations. Chief biotic components studied were phytoplankton population density, primary and auxiliary phytopigments, and productivity in addition to chromophoric dissolved organic matter (CDOM). Majority of the study sites were observed with very low concentrations of dissolved oxygen along with significant shifts in primary production. Overall prevalence of Cyanophyceae and Bacillariophyceae was indicative of significant eutrophication. Reverse phase high performance liquid chromatography (HPLC) and radiometry revealed the presence of a large array of algal taxonomic groups through the detection of various primary and auxiliary phytopigments. The data and the study itself is of paramount importance being part of the ground truth verification initiative which will be used to render remote sensing techniques more precise in the future to better monitor the estuarine system.

印度太空研究组织（ISRO）与美国国家航空航天局（NASA）之间的机载可见红外成像光谱仪-下一代（AVIRIS-NG）计划下的一个项目，对Hooghly河的一段32公里长的区域进行了研究。 ）。它受33个水质变量控制，包括物理，化学，生物和生态变量。选定的站点位于河口的潮汐范围内，构成了受人为扰动严重影响的河中下游。研究的主要生物成分是浮游植物种群密度，主要和辅助植物色素以及生色溶解性有机物（CDOM）之外的生产力。观察到的大多数研究地点的溶解氧浓度非常低，并且初级生产发生了重大变化。蓝藻科和芽孢杆菌科的总体患病率表明存在富营养化。反相高效液相色谱（HPLC）和放射线照相法通过检测各种主要的和辅助的植物色素，揭示了一大批藻类分类学基团的存在。数据和研究本身是地面真相验证计划的一部分，该计划将在未来使遥感技术更加精确，从而更好地监控河口系统，这是至关重要的。反相高效液相色谱（HPLC）和放射线照相法通过检测各种主要的和辅助的植物色素，揭示了一大批藻类分类学基团的存在。数据和研究本身是地面真相验证计划的一部分，该计划将在未来使遥感技术更加精确，从而更好地监控河口系统，这是至关重要的。反相高效液相色谱（HPLC）和放射线照相法通过检测各种主要的和辅助的植物色素，揭示了一大批藻类分类学基团的存在。数据和研究本身是地面真相验证计划的一部分，该计划将在未来使遥感技术更加精确，从而更好地监控河口系统，这是至关重要的。