Ka whakanohoia te pūoko ki runga i te tihi o te pūoro, ā, ka tukuna te pāorooro ultrasonic e te pūoko ki te mata o te rauemi e aroturukitia ana. I reira, ka whakaatahia anō, ka riro mai i te pūoko. Ka ine te kaihautū i te wā t i waenga i te tuku me te whiwhinga pāoro. Ka whakamahia e te kaihautū te wā t (me te tere o te oro c) hei tatau i te tawhiti d i waenga i te raro o te pūoko me te mata wai e aroturukitia ana: d = c •t/2. I te mea e mōhio ana te kaihautū ki te teitei tāutanga H mai i te tautuhinga tawhā, ka taea e ia te tatau i te taumata penei: h = H – d.
I te mea ka pāngia te tere o te oro i te hau e ngā huringa pāmahana, kua whakauruhia e te OCM tētahi pūoko pāmahana hei whakapai ake i te tika.
Mō ngā awaawa kua whakatauhia, he whanaungatanga mahi pumau kei waenganui i te rere inamata me te taumata wai. Ko te tātai ko Q=h (x). Ko te tikanga o Q ko te rere inamata, ko te tikanga o h ko te taumata wai i roto i ngā awaawa. Nō reira, ka taea e te kaihautū te tatau i te tere rere mā roto i ngā awaawa kua whakatauhia me te uara taumata.
He mea nui kia mārama ki te kaupapa matua o te mahi me te tāutanga o ngā taputapu i muri mai.
Wā tuku: 29 Paenga-whāwhā 2022