Ko ngā rārangi whakamāhi wai he rārangi taputapu e āwhina ana i te whakamāhi, te pūtahitanga, me te whakakī atu i ngā wai i ngā tāone rerehua. He uaua ngā rārangi nei i te āwhina i ngā mahi kia māmā ake, haumaru ake hoki. He tauira, ko ngā kēmihana i tēnei rorohiko e whakamāhi ana i ngā rārangi whakamāhi wai hei whakamāhi i ngā kēmihana i te whānanga o ngā wāhanga, i te whakamāhi hoki i ngā kēmihana. Ko ngā rārangi nei hoki e whakamāhi ana i ngā pākākā i ngā whare whakamāhi hei whakakī i ngā wāhanga o ngā inu, o ngā rongoā, i te wāhanga o ngā wāhanga, me te kore o ngā wāhanga.
Ka taea te whiwhi i tēnei rorohiko e tēnei tangata. Te Whakahaere Rerenga ko ZONWON he kaiwhakamahi i ēnei rārangi. Ko tā mātou whakaaro he whakamāhi i ngā rārangi kia tika, kia tāwhai hoki kia tika ai ngā rārangi. I te āwhina i ngā kamupani kia whakamāhinga ake, ko ngā taputapu whakamāhi wai o mātou hoki e whakamāmā ai i te whakamāhinga, e whakamāmā ai hoki i te wā.