Evaluation of Methods for Estimating Lake Surface Water Temperature Using Landsat 8
Loading...
Date
2022-08-08
Advisor
Editor
Journal Title
Journal ISSN
Volume Title
Publisher
Title alternative
Abstract
Changes in lake water temperature, observed with the greatest intensity during the last two
decades, may significantly affect the functioning of these unique ecosystems. Currently, in situ studies
in Poland are conducted only for 38 lakes using the single-point method. The aim of this study was
to develop a method for remote sensing monitoring of lake water temperature in a spatio-temporal
context based on Landsat 8 imagery. For this purpose, using data obtained for 28 lakes from the period
2013–2020, linear regression (LM) and random forest (RF) models were developed to estimate surface
water temperature. In addition, analysis of Landsat Level-2 Surface Temperature Science Product
(LST-L2) data provided by United States Geological Survey (USGS) and the National Aeronautics
and Space Administration (NASA) was performed. The remaining 10 lakes not previously used
in the model development stage were used to validate model performance. The results showed
that the most accurate estimation is possible using the RF method for which RMSE = 1.83 °C and
R^2 = 0.89, while RMSE = 3.68 °C and R^2 = 0.8 for the LST-L2 method. We found that LST-L2 contains
a systematic error in the coastal zone, which can be corrected and eventually improve the quality of
estimation. The satellite-based method makes it possible to determine water temperature for all lakes
in Poland at different times and to understand the influence of climatic factors affecting temperature
at the regional scale. On the other hand, spatial presentation of thermics within individual lakes
enables understanding the influence of local factors and morphometric conditions.
Description
Sponsor
Keywords
lakes, water temperature, Landsat, thermal images, Poland
Citation
Dyba K., Ermida S., Ptak M., Piekarczyk J., Sojka M., Evaluation of Methods for Estimating Lake Surface Water Temperature Using Landsat 8. Remote Sensing. 2022; 14(15):3839. https://doi.org/10.3390/rs14153839