PRECIPITATION STORAGE STRUCTURE AND PRECIPITATION STORAGE METHOD

摘要

PPROBLEM TO BE SOLVED: To provide a precipitation storage structure and a precipitation storage method that can increase the storage amount of water in the ground. PSOLUTION: The upper end 10A of a water passing body 10 communicates with a precipitation surface P, and the lower end 10B is disposed underground. A water receiving body 30 is placed below the lower end 10B of the water passing body 10, and the position of the lower end 10B of the water passing body 10 is made lower than the rising edge 32 of the water receiving body 30. When it rains, water passing through a permeable pavement 20 is led into the ground through the water passing body 10, and an aquifer L3 in a saturated wet state with underground soil grains saturated with water is formed on the water receiving body 30. Once the saturated wet state is formed, water is held in the saturated wet state on the water receiving body 30 even in a dry state when fine weather continues, and water held in the water receiving body 30 and the water passing body 10 are placed in a communicating state. The position of the lower end 10B of the water passing body 10 may be made lower than the underground water level by eliminating the water receiving body 30. PCOPYRIGHT: (C)2010,JPO&INPIT