Idreyini ye-geonet ene-dimensional ezintathu (ekwaziwa ngokuba yi-three-dimensional geonet drain, itonela ye-geo net drain, umnatha wokuhambisa amanzi): Ngumnatha weplastiki onamacala amathathu onokubopha i-geotextiles emanzi kumacala amabini.Inokuthi ithathe indawo yesanti yesiqhelo kunye noomaleko begrabile kwaye isetyenziselwa ubukhulu becala ukulahla inkunkuma, ukuthuthwa kwenkunkuma, iindawo eziphantsi kunye neendonga zetonela.