Rainfall interception under a fractal sunshade

A part of rainfall is intercepted by the canopy of vegetation and evaporates into the atmosphere directly. The rest of rainfall reaches the ground by dripping from the canopy or running down the stems. However, it is difficult to evaluate how much rainfall through the canopy evaporates, drips, and runs down because the distribution of trees, leaves, and stems is not uniform. So for simplicity, we used a "fractal sunshade" and compared the amount of rain under a fractal sunshade and under nothing to evaluate how much rainfall is intercepted by a fractal sunshade. A fractal sunshade is made of a few centimeters plates placed like the Sierpiski tetrahedron and the leaf area index of fractal sunshade is 1. The distribution of the plates resembles that of leaves so that the amount of rainfall interception is similar to that through tree crowns. As a result, the rate of interception is 1 to 9 percent during autumn to winter.