| 摘要 |
PROBLEM TO BE SOLVED: To provide a vegetation unit having excellent easiness for set-up, capable of surely controlling a rainwater flow at the peak of rainfall and preventing an urban flood. SOLUTION: This vegetation unit is characterized in that the unit is equipped with a temporary storage part for receiving excessive water from a vegetation part, the temporary storage part is furnished with an outflow part for flowing out water in the inside, an inflow part for flowing excessive water in the vegetation part to the temporary storage part is installed between the vegetation part and the temporary storage part and the outflow part and the inflow part are set so that the upper limit value of the amount of water to be flown out from the outflow per unit time is less than the upper limit value of the amount of water to be flown in from the inflow part per unit time. |
