How to make"biopori hole" first , prepare the tool to make biopori like a drill ground and materias for th e filler hole. after that specify the location where you want to create biopori hole.the place has been determined, after that,you simply make a cyindrical hole vertic al hole into the ground with a diameter 10-30 CM. Design is also the depth of approximately 100cm or not exceed the ground water. if the soil water was shallow preferably the hole recommended distance 50-100Cm. after the hole is complete, another thing you should do is strengthen the mouth hole with cement. finaly fill the hole ithorganic wastte like garden waste an kitchen waste. prepare: Make (something) ready for use or consideration: prepare a brief summary of the article specify: Identify clearly and definitely: the coup leader promised an election but did not specify a date been: Past participle of be : (singular present am / am / ; are / är / ; is