He rereke te whakamatao hau whakaetonga mai i nga whakamaarama hau o te pokapū tuku iho i roto i a raatau tikanga whakamahana whakaeto wai.te reirakaua e hiahiatia he whakamatao, he kopiri ranei.Ko te tikanga whakamatao matua ko te wai.Na reira, he mea tino nui mowhakamatao hauki te whakamataote wai.Mena kei te pirangi nga kaiwhakamahi ki te pai ake o te whakamahana, ka whakamahia e ratou he whakamahana hei whakahekete pāmahana wai ohe wai mo te whakamatao hau.Ka taea e tenei te whakapai ake i te paanga whakamahana o te hau whakaahuru taiao.Ko te rereketanga o te pāmahana he iti rawa te 2-3°C.Na reira, he mea nui te wai mo te whakamatao o te hau.i te mea he mea nui, e hia te nui o te wai me tapiri i te wa kotahi, me te maha o nga huringa o te wai?

Ka wehea nga momo whakamaarama taiao ki nga momo e rua: te whakamatao hau wai pūkoro me te miihini whakamatao hau ahumahi.He rereke ano a ratou tikanga mo te taapiri wai me te nui o te wai ka tapiritia.Ahakoa he rite tonu te ahua o te rangi, he rereke te kaha ki te penapena wai i runga i te tauira.Hei tauira, mo te whakamatao haume te 100L waitankme te kaha ki te rokiroki wai kore, katahi ko te 100L te rahinga o te nui o te wai ka taapirihia i ia wa.Ka pau te kaha o te rokiroki wai, me taapiri he wai i te waa.O te akoranga, ki te hehe whakamatao hau ahumahi, karekau matou e awangawanga mo tetahi mea na te mea ka taapiri aunoa i te wai.

He whakamatao hau ahumahite nuinga o te wa ka whakauruhia ki runga i te pakitara taha, i te tuanui ranei o te wheketere.He tino whakaraerae ki te taapiri i te wai ma te ringa, no reira ka whakamahia e nga miihini miihini katoa te whakakii i te wai aunoa, ka tukuna aunoatia te wai ma te punaha tuku wai, i te wa e ka ana.Ka mahi aunoa te punaha tuku wai ki te whakarato wai.No reira, karekau e hiahia kia kaha te taapiri wai ki tenei momo kaihautu hau.Ka taapiri aunoa me te whakarereke i te wai.Me whakarite noa kia ma te kounga wai o te punaha tuku wai, kia kaua e poke.