ATTENTION/WARNING - NE PAS DÉPOSER ICI/DO NOT SUBMIT HERE

Ceci est la version de TEST de DIAL.mem. Veuillez ne pas soumettre votre mémoire sur ce site mais bien à l'URL suivante: 'https://thesis.dial.uclouvain.be'.
This is the TEST version of DIAL.mem. Please use the following URL to submit your master thesis: 'https://thesis.dial.uclouvain.be'.
 

A comparative analysis of products and algorithms employed for the assessment of chlorophyll-alpha concentrations in the African Great Lakes

Lemaire, Romain
(2024)

Files

Lemaire_50581700_2024.pdf
  • UCLouvain restricted access
  • Adobe PDF
  • 13.35 MB

Details

Supervisors
Alonso, Alice ; Vanclooster, Marnik
Faculty
Faculté des bioingénieurs
Degree label
Master [120] : bioingénieur en sciences et technologies de l'environnement, à finalité spécialisée
Abstract
This master thesis investigates the Chlorophyll-alpha dynamics of Lake Tanganyika and Lake Victoria, whose water quality is crucial for both ecological and economic reasons as they provide a valuable food source for the surrounding inhabitants. The focus of this study is to evaluate the capabilities and limitations of satellite remote sensing for analyzing Chlorophyll-alpha, particularly the discrepancies arising from different remote sensing products and algorithms. The study uses a range of satellite products, including producted derived from : OC SMI MODIS Aqua and Terra, CCI-lake product, and OC SMI SEAWIFS, along with in-situ measurements. The results show consistent spatial variability within Lake Tanganyika for the considered products and algorithms. However, important discrepancies are observed for high chlorophyll-alpha values between the considered products and algorithms. On the other hand, Lake Victoria’s Chlorophyll-alpha spatial variability displays both consistent patterns in the location of hotspots and discrepancies across algorithms in the extent and concentration ranges of these hotspots. In the temporal dynamic context of Lake Tanganyika, the results of this study would modestly suggest considering OC SMI MODIS derived OC5, OC SMI SEAWIFS derived OC6, and both CCI and CCI-lake products. However, for Lake Victoria, due to limited in-situ data, specific recommendations are withheld, hindering reliable conclusions about its Chlorophyll-alpha dynamics. Nevertheless, the OC SMI MODIS OC5, OC6 and CCI-lake seem to hold great potential to deal with the complex water environments of this lake.