**Abstract**

The relationship of compressive behavior according to manufacturing process parameters of geonet was investigated. We analyzed the drainage behavior of the bi- and tri-plane geonet used for the planar drainage and investigated the changes of the drainage behavior due to the restraining load. The data showed that there is no critical manufacturing factor to affect- the compressive strength of the bi-planar geonet. All of these parameters can affect in a very- complicated way. And the strand inclination can mainly affect to the after compressive- strength, i.e., roll-over behavior. The results considering site-specific conditions of the landfill- system explained the temperature has influence on the compressive behavior of the geonet.- The compressive strength was reduced and the strain at yield increase gradually with the temperature for both of bi- and tri-planar geonet. Significant reductions in flow capacity- were observed for the traditional bi-planar and cylindrical type geonet and this value was consistent to the compressive strength. These decreases were anticipated due to the abrupt thickness decrease of the geonet caused by roll-over. In the other hand, there was no significant decrease of transmissivity for the tri-planar geonet which has no roll-over phenomena.

**Keywords:** geonets, compressive behaviors, transmissivity, strand inclination, flow capacity, roll-over phenomena-
