Zvigadzirwa zveTri-planar zvinoumbwa nepakati pepakati HDPE mbabvu dzinopa kuyerera kwechannelized, uye diagonally yakaiswa kumusoro nepasi tambo inoderedza geotextile intrusion. Iyo void inochengetedza musimboti chimiro inopa yakakwirira transmissivity pane bi-planar zvigadzirwa.