Fig. 7: Spatiotemporal distribution of EFT and EFB.

The watershed is divided into 3376 grid cells of 10 × 10 km. The height of the bar charts in the top-right corner represents the number of grid cells whose index values of this type fall into the four levels (0–0.2, 0.2–0.4, 0.4–0.6, 0.6–0.8) respectively in the corresponding year.