2019-03-17学习笔记：读论文-A Quantitative Comparison of Total Suspended Sediment Algorithms: A Case Study of

Monitoring TSS along with other water quality parameters is crucial for coastal ecology because TSS can directly affect the turbidity and color of water [3] and turbidity determines the amount of light availability at depth for primary production.

An empirical model is often sought for its simplicity and explanatory power because
unique properties of local waters are tuned to each model, but it may lack general applicability.
An analytic model is potentially applicable to other water bodies because it is not dependent on the in situ water constituents, but it requires accurate knowledge of water column properties which is often difficult to acquire. The semi-analytic model has both the limitations and advantages associated with the first two models, and it is generally preferred because it has higher explanatory power and is more convenient than the analytic model

考虑到每个模型都是针对特定区域、水类型及其相关的IOPs开发和调整的，因此模型在其他区域的应用或可转移性受到限制，且结果的可能准确性未知。即使将现有的TSS模型应用于类似区域的水域，在应用之前也常常要重新校准。

Hydrolight的作用：Using a forward model HydroLight solves radiance distributions and
derives reflectance and radiance for water bodies with specific inherent optical properties (SIOPs) for given sky and water state conditions

因此,由于问题的精确造型来满足任何特定水域TSS模型,并承认这一事实我们不能模拟海洋的所有条件和组成成分不同的地区,我们采取了五个不同的类(如表2所示)来表示不同情况下的水浓度的一个海洋成分可能主宰他人或从每个成分有不同程度的贡献
启示：通用模型，并不是确切意义上的“通用”，二是分成若干类，在不同的类别上是通用的。
The next common reflectance type used in TSS algorithms is a normalized water-leaving
reflectance which is related to Rrs() as follows:
rw(l)jN = pRrs(l)

Models are considered semi-analytic because they are derived based on a physical form [56] or one or more parameters in the TSS algorithms are either parameterized using site-specific or global in-water bio-optical properties.