STRUCTURE OF RAINWATER GUIDE PART IN RAINWATER STORAGE FACILITY

PROBLEM TO BE SOLVED: To provide a rainwater guide part allowing easy and accurate construction of a rainwater guiding slant face for discharging rainwater accumulated inside a rainwater storage facility to a water conducting groove side.SOLUTION: The rainwater guide part 2 is formed by arranging a plurality of rainwater guide unit members 20 in parallel laterally and vertically in the bottom of a water storage tank 1 formed by excavating the ground, and a rainwater storage part 3 is formed by stacking a rainwater storage unit member 30 on the rainwater guide part 2. The rainwater guide unit member 20 is formed of a rectangular slant plate 21, a support column 22 screwed through the upper tilt end both side parts of the rectangular slant plate 21, and a holding support column 23 passed through the lower tilt end both side parts. When a plurality of rainwater guide unit members 20 are arranged in parallel while changing their height by the support columns 22 and 23, a series of rainwater guiding gentle slant faces 2a gently tilting downward toward the water conducting groove 5 side from one end side of a water storage tank 1 is formed.