The invention provides a substrate board A for water storage and drainage, characterized by vertically disposing first supporting columns 31 and second supporting columns 32 in a recess portion 20 for water storage, wherein the water storage recess portion 20 is divided by surrounding walls 10 (11, 12) which serve as retaining and embankment walls, and the upper surface of the first supporting column 31 is equal to or higher than the supper surface of the surrounding walls 10, while the upper surface of the second supporting column 32 is lower than the supper surface of the surrounding walls 10. A planting soil G disposed on a water-absorbing flake B is in a state of a storing water W when entering into the recess portion 20 in the proximity of the second supporting column 32, and the storing water W is aspirated and sucked into the planting soil G by capillary attraction. In the proximity of the surrounding walls 10, the breathing action of hair roots will not be hindered because an air layer is formed between the water storage W and the water-absorbing flake B. Thereby, the storing water W in the recess portion 20 can be effectively aspired and sucked in when using a green-making structure C formed on a man-made ground base D of the substrate board A for water storage and drainage.本發明係提供一種貯水排水基盤板A,其係使用在貯水用凹部20內立設第1支柱31及第2支柱32而成者,其中該貯水用凹部20係由作為堤堰的功能之周牆10(11、12)所區隔,該第1支柱31係頂面高度與周牆的頂面高度相同或較高,而該第2支柱32係頂面高度比周牆的頂面高度低。在吸水性片B之上所配置的植生用土壤G,係成為在該該第2支柱32的附近進入貯水用凹部20內的貯水W中之狀態,且水W係藉由毛細管現象而被植生用土壤G所抽吸。在周牆10的附近,因為貯水W與吸水性片B之間係形成有空氣層,所以毛根的呼吸作用亦不會受到阻礙。藉此,在使用貯水排水基盤板A之人工地基D上的綠化構造體C中,貯水排水基盤板A之貯水用凹部20內的貯水W係能夠確實地被植生用土壤G所抽吸。10‧‧‧周牆11‧‧‧外周牆12‧‧‧內周牆13‧‧‧排水溝14‧‧‧突出部17‧‧‧刻有缺口的區域18‧‧‧腳20‧‧‧貯水用凹部30‧‧‧支柱31‧‧‧第1支柱32‧‧‧第2支柱33‧‧‧第3支柱A‧‧‧貯水排水基盤板B‧‧‧透水性片C‧‧‧在人工地基上的綠化構造體D‧‧‧作為人工地基之屋頂建築骨架E‧‧‧耐根片F‧‧‧邊緣材G‧‧‧植生用土壤(客土層或是植生毯等)H‧‧‧植生植物W‧‧‧貯存水
