Total suspended matter (TSM) is an important parameter of ocean water quality and for aquatic environmental assessment. The Zhoushan Islands are near the estuarine and coastal regions of the Yangtze River and Qiantang River and TSM occurs at very high concentrations and in long-term suspended states. The distribution and variation of TSM in the Zhoushan Islands has great impacts on its coastal water quality and activities such as ferry services, fisheries, and tourism. Based on Landsat-8’s blue and near-infrared bands, this study developed a sigmoid TSM inversion model that was more accurate and robust than the other common linear and exponential models. We also checked three types of atmospheric correction models, FLAASH, 6S, and ACOLITE and determined that ACOLITE is better than the other two methods when using Landsat-8 in ocean color in estuarine and coastal regions. The sigmoid model was then applied to a series of Landsat-8 images covering the Zhoushan Islands from 2013 to 2018, and the image-derived results show that TSM absorption coefficients in the Zhoushan Islands are extremely high and range from 0.26 to 444.29 m⁻¹ with a mean of 113.14 m⁻¹. Furthermore, they have a clear downward gradient from the Hangzhou Bay to the open sea. In addition, the TSM concentrations in winter are usually much higher than those in summer. Our results indicate that TSM spatiotemporal variations in the Zhoushan Islands are not only controlled by many natural environmental factors, such as riverine discharge, but are also significantly influenced by many human activities such as transportation, tourism, and fisheries.

总悬浮物（TSM）是海洋水质和水生环境评估的重要参数。舟山群岛靠近长江和钱塘江的河口和沿海地区，TSM浓度很高，长期处于悬浮状态。TSM在舟山群岛的分布和变化对其沿海水质以及轮渡服务，渔业和旅游业等活动产生重大影响。该研究基于Landsat-8的蓝色和近红外波段，开发了一种S型TSM反演模型，该模型比其他常见的线性和指数模型更准确，更可靠。我们还检查了三种类型的大气校正模型，即FLAASH，6S，和ACOLITE，并确定当在河口和沿海地区使用海洋颜色的Landsat-8时，ACOLITE比其他两种方法更好。然后将S形模型应用于一系列覆盖舟山群岛的Landsat-8图像（2013年至2018年），图像得出的结果表明，舟山群岛的TSM吸收系数极高，范围为0.26至444.29 m^-1，平均为113.14 m ^-1。此外，它们从杭州湾到公海都有明显的下降梯度。另外，冬季TSM的浓度通常比夏季高。我们的结果表明，舟山群岛的TSM时空变化不仅受许多自然环境因素控制，例如河流排放，而且还受到许多人类活动（如交通，旅游和渔业）的显着影响。