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  Estonian Journal of Ecology

ISSN 1736-7549 (electronic)   ISSN 1736-602X (print)
An international scientific journal

Formerly: Proceedings of the Estonian Academy of Sciences: Biology, Ecology
(ISSN 1406-0914)
Published since 1952
 

Estonian Journal of Ecology

ISSN 1736-7549 (electronic)   ISSN 1736-602X (print)
An international scientific journal

Formerly: Proceedings of the Estonian Academy of Sciences: Biology, Ecology
(ISSN 1406-0914)
Published since 1952
 

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Variability of optical water types in Lake Peipsi; 33–46

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Authors

Anu Reinart, Kristi Valdmets

Abstract

Lake Peipsi is a large freshwater lake that needs regular and careful monitoring. Remote sensing could be a powerful tool for this purpose; however, the standard ocean colour products often fail over optically complex waters. A three-year intensive study of optically active sub­stances and reflectance was carried out in L. Peipsi. We determined that the lake’s water most commonly belonged into Moderate (65%) type, followed by Turbid (16%) and Clear (9%) types; only 5% of the samples were classified into Very turbid and Brown types. Because water types vary in time and space, there is a need for a comprehensive approach to the optical classification of water types, which could automatically be applied to satellite image. Despite the differences in optically active substances, reflectance spectra in Moderate and Turbid types cannot be distinguished by the standard processing scheme of the MODIS sensor because of its lack of suitable bands.

Keywords

optical properties, turbid lake, remote sensing

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Current Issue: Vol. 63, Issue 4, 2014




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No. 1: 20 March
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