The images are selected to show the variation in water hyacinth coverage for the months September to January since 2016. The dark green color in the water body shows the water hyacinth. The images showed that in one-year period, the water hyacinths coverage increased significantly. For example, in October 2017, the lake has small water hyacinth coverage in the northeastern part of the Lake Tana basin; however, in September 2017 (in one-year period), a significant water hyacinth coverage was observed. In 2016, the water hyacinth was concentrated in a small pocket in the northern corridor. However, in January 2018, it stretched along the Lake shore.
The data was obtained from Planet Company, https://www.planet.com/. They provide the data free of charge for professionals working for none profit research activities. The data has a resolution of 3 m by 3 m. Planet’s satellites orbit the poles every 90 minutes, capturing the entire Earth’s landmass every day.
Satellite image showing water hyacinth coverage from Sep 2016 to Jan 2018