Earth Observation aLMI Derived Water Quality Products for Melbourne Water's WTP

Products outputs produced by CSIRO from the H2020 PrimeWater project for the Melbourne Water's Western Treatment plant at Werribee, Victoria, Australia.\nLineage: The aLMI code was installed on the CSIRO EASI platform (https://research.csiro.au/cceo/underpinning-technologies/earth-analytics/ ) and applied to the two Australian study sites using the multispectral Sentinel-2 and Landsat-8 analysis ready data (ARD) surface reflectance data publicly available on the Digital Earth Australia. The aLMI model was applied to the Sentinel-2 and Landsat 8 Analysis Ready Data (ARD) parameterised using SIOP sets from Lake Hume and the WWTP sites. Eight SIOP sets were provided to the model for Lake Hume and WWTP runs respectively. In each case, inversion runs for each site were conducted using the SIOP sets measured at the water body. The aLMI code retrieves simultaneous concentration estimations of chlorophyll-a and Non-algal Particulates (NAP), Colour Dissolved Organic Matter absorption (aCDOM(440nm)), Vertical Attenuation coefficient Kd(490nm) and Secchi Disk Depth (SDD). Additional parameters can be output if required, including:\n•\tDiffuse extinction coefficient (PAR) \n•\tTotal, Phytoplankton and NAP absorption\n•\tPhytoplankton, Particulate & NAP backscattering \n•\tModel closure\n

本数据集由澳大利亚联邦科学与工业研究组织（CSIRO）基于欧盟地平线2020计划（H2020）PrimeWater项目产出，服务于澳大利亚维多利亚州韦里比的墨尔本水务西部污水处理厂。
数据谱系：aLMI代码部署于CSIRO的EASI平台（https://research.csiro.au/cceo/underpinning-technologies/earth-analytics/），并依托澳大利亚数字地球平台公开的多光谱哨兵-2（Sentinel-2）与陆地卫星8号（Landsat-8）分析就绪数据（Analysis Ready Data, ARD）地表反射率产品，对两处澳大利亚研究站点开展模型应用。本次所使用的aLMI模型基于休姆湖（Lake Hume）与污水处理厂站点的SIOP参数集进行参数配置，分别为休姆湖与污水处理厂的模型运行各提供了8组SIOP参数集。针对每个研究站点，均采用对应水体实测的SIOP参数集开展反演运算。aLMI代码可同步反演得到叶绿素-a、非藻类颗粒物（Non-algal Particulates, NAP）、有色溶解有机物吸收系数（Colour Dissolved Organic Matter absorption, aCDOM(440nm)）、垂直衰减系数Kd(490nm)以及赛氏盘深度（Secchi Disk Depth, SDD）的浓度估算结果。若有需求，还可输出以下额外参数：
• 光合有效辐射（Photosynthetically Active Radiation, PAR）漫消光系数
• 总吸收、浮游植物吸收与非藻类颗粒物吸收
• 浮游植物后向散射、颗粒物后向散射与非藻类颗粒物后向散射
• 模型闭合度