Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2023, Vol. 20, No. 5, pp. 50-68
Analysis and verification of turbidity and suspended solids concentration determination algorithms implemented in the ACOLITE software package
P.D. Zhadanova
1 , K.R. Nazirova
1 1 Space Research Institute RAS, Moscow, Russia
Accepted: 14.10.2023
DOI: 10.21046/2070-7401-2023-20-5-50-68
Obtaining quantitative information on physical and hydro-optical parameters of the marine environment based on remotely sensed data is one of the urgent tasks of satellite oceanology. The paper presents a detailed review of modern Nechad and Dogliotti algorithms after application of ACOLITE DSF atmospheric correction. The methodology of calculations of seawater optical parameters using the above mentioned algorithms is detailed and the experience of using various standard satellite algorithms in the coastal zones of the Caspian and Black seas is described. Examples of calculations of suspended solids concentration and turbidity of seawater in test estuaries are given. The aim of the work was to verify the algorithms for calculating suspended sediment concentration and seawater turbidity in test areas using the results of quasi-synchronous in situ measurements. It was found that the use of the standard Nechad algorithm for calculating seawater turbidity gives high correlation with the results of sub-satellite measurements in the Mzymta river mouth areas at turbidity values <50 NTU. The possibility of using the Dogliotti algorithm in different geographical areas under the condition of high turbidity of coastal waters ≥100 NTU is shown. The results obtained can serve as a methodological recommendation for the use of the algorithms considered in this paper in the coastal areas of the Black and Caspian seas.
Keywords: water turbidity, suspended sediment concentration, in situ measurements, ACOLITE, Sentinel 2 MSI, Landsat-8, -9 OLI/TIRS, Caspian Sea, Terek, Sulak, Black Sea, Mzymta
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