GL yakapa cheni dzakakosha dzekuchenesa mvura yemidziyo yakasiyana-siyana yekuchenesa mvura, iyo inogona kushandiswa mumutsara wekugadzira wemidziyo yekuchenesa mvura inosanganisira yekufambisa mvura, jecha rezviyo sediment box, preliminary sedimentation uye yechipiri sedimentation. Kuti zvizadzise zvinodiwa zvemhando dzakasiyana-siyana dzekuchenesa mvura, GL haigoni kungopa maketani ekugadzirisa mvura akagadzirwa nesimbi isina tsvina uye yakakosha alloy simbi, asiwo inopa macheni akaumbwa ekurapa mvura.