Obtaining data by satellite

COMMENT: In the graphs, the measurement is made with the number of colors, the values ​​that are in the middle to the left represent the amount of green that there is and those that are in the middle to the right are the amount of blue that there is. We can see that the evolution of the lagoon has been irregular over the years because there are years when there is a lot of water, other years there is very little and other years there is water but not excessively. The satellite used to take these images is Sentinel-2 L2A. And the filter that has been used is the NDWI.

COMMENT: You can see from the images that the water remains constant over the years, since the amount of water varies minimally. The satellite used to take these images is Sentinel-2 L2A. And the filter that has been used is the NDWI. Although in 2020 a certain change in trend can be seen, in general we see how the water surface of the lagoon is reducing

.COMMENT: We have observed a small decrease in the volume of water over time. These images have been taken with the Sentinel-2 L2A satellite. And the filter that has been used is the NDW

What can be extracted from these photos is a clear decrease in the amount of snow that we can find in Sierra Nevada (data from 2001 to 2015 with the Landsat 5/8 satellite, image from 2023 with Sentinel-2 L2A)

COMMENT: What can be concluded about the images is the following, since you can see a clear increase in vegetation from 2001 to 2022, because the yellow areas have been reduced and a predominance of green is seen. These images have been taken with the Sentinel-2 L2A satellite. And the filter that has been used is the NDWI

Las imágenes obtenidas las hemos sacado de:  EO Browser