Autumn rain falls onto knotweed leaves in the Hinterhof

Steady rainfall recorded with the microphones on the ground sheltered under Japanese knotweed leaves. Two year ago there was a cherry tree is this Hinterhof. It provided much tasty fruit. Sadly it began to lean over and was cut down; almost the only act of gardening that has ever happened here. Now Japanese knotweed has taken over. Such an invasive plant.