Te Mahere Hauwaiwaro mā te Whakamahi i te Ahupūngao Whenua
Pendahuluan
Ko ngā hauwaiwaro—te hinu me te hau māori—koia tonu te pūtake pūngao matua i roto i te maha o ngā whenua, ā, he rauemi mata nui mō te umanga hinu matū. Heoi, kāore e taea te kimi i ngā kohikohinga hauwaiwaro whai hua ā-ōhanga mā te whakaaro noa iho. Kei raro i te mata ngā puna wai, kua kapihia e ngā paparanga toka uaua, ā, he pānga mai i te hītori whenua roa. Nō reira, ko te tūhuratanga hou e whakawhirinaki ana ki ngā huarahi pūtaiao ka taea te "kite" i raro i te whenua i te taha ā-kore. Koinei te wāhi e uru mai ai te ahupūngao whenua: he raupapa tikanga mō te ine i ngā āhuatanga ā-tinana o te Ao hei whakamārama i te hanganga me te momo toka o raro i te mata, kia taea ai te mahere tika me te whai hua ake o ngā tirohanga hauwaiwaro.
Kāore te ahupūngao whenua e tū takitahi. Ko te mea pai, me whakauru atu ki te matawhenua, te matū whenua, me ngā raraunga puna. Heoi, mai i te tūhuratanga tōmua tae noa ki te whakawhanaketanga o te mara, ko te ahupūngao whenua te poutokomanawa o te whakatau kaupapa—mai i te whakatau i te wāhi rangahau, te mahere mahanga, te whakatau i te matotoru o te paru, tae atu ki te aroturuki i ngā huringa wai i te wā whakaputa.
Te Ariā o te Pūnaha Hinu me ngā Whāinga Mahere
I mua i te matapaki i te tikanga, he mea nui kia mārama tātou ki tā tātou e ngana ana ki te mahere. I roto i ngā pūnaha hinu, ka puta ngā hauwaiwai i roto i ngā toka pūtake, ka heke mā roto i ngā ara motuhake, kātahi ka kohia ki roto i te ngā toka o te puna wai he nui te pūngao me te uruhanga. Me hipoki tēnei kohikohinga ki tētahi hiri, ā, i te nuinga o te wā ka noho ki roto i tētahi mahanga hanganga (hei tauira, te rārangi ā-taha, te hapa) i tētahi mahanga paparanga rānei (hei tauira, te kōpiripiri, te hanga toka).
Ko te mahi a te matawhenua he mahere i ēnei huānga mā te kore aro:
1. Te āhua o ngā hanganga (ngā kopa, ngā hapa, ngā kōhao tote).
2. Te matotoru me te tohatoha o te paru (te puna paru, te pokapū putunga).
3. Ngā āhuatanga o te toka (te āhua o te toka, te pūngao ā-ira, ngā rohe pakarukaru).
4. Te aroaro me te momo wai (he tohu mō te hau, te hinu, te wai rānei) mā roto i ētahi urupare ā-tinana.
I roto i ēnei, ko ngā tikanga ru whenua te taputapu matua nā te mea he tino kounga te taumira mō te mahere hanganga me te mahere papa whenua. Heoi, ko ētahi atu tikanga pēnei i te kaha ā-papa, te aukume, te hikohiko, me te tuhi puna he hoa mahi nui ki te whakaiti i te koretake.
Tikanga RuTe Tuarā o te Tūhuratanga
Ngā Mātāpono Taketake
Tikanga rū whenua Ka mahi rātou mā te tuku i te kaha o ngā ngaru (hei tauira, mai i te vibroseisser i runga i te whenua, i te pū hau rānei i te moana) ki raro i te whenua. Ka whakaatahia, ka hurihia rānei ngā ngaru i a rātou e haere ana i roto i ngā paparanga toka he rerekē ngā ātete oro. Ka tuhia e ngā pūoko (geophone, hydrophone rānei) te wā haere o ngā ngaru e hoki ana ki te mata.
Rū whenua 2D me te 3D
– Ka puta he wāhanga whakawhiti o raro i te mata i te rūma whenua 2D i runga i tētahi ara motuhake. He pai mō ngā rangahau ā-rohe me te mahere tuatahi o te puna.
– Ka puta he nui ngā raraunga mai i te rūma ru 3D kia tika ake ai te whakamāramatanga hanganga, inā koa mō ngā mahanga uaua me te whakamahere puna whakawhanake.
– Ka whakatauritehia e te ru whenua 4D (wā-whakawhiti) ngā rangahau 3D i ngā wā rerekē hei aroturuki i ngā huringa wai i te wā whakaputa—hei tauira, te nekehanga o ngā taha werohanga wai, hau rānei.
Ngā Āhuatanga Rūwhenua me ngā Tohu Waikawa
Haunga ngā whakaata mahere, ka whakamahia e te umanga ngā āhuatanga ru whenua hei tango i ētahi atu mōhiohio, pērā i te kaha, te auau, te ōritetanga, me te piko. Ko ētahi ariā matua:
– Ira kanapa: he kaha teitei e tohu ana i te hau i ētahi wā, inā koa i ētahi taiao.
– Ira papatahi: he whakaata papatahi e tohu ana i te pānga o te wai (hei tauira, te hau-wai).
– AVO (Amplitude Versus Offset): mā ngā panonitanga o te amplitude e pā ana ki te tawhiti o te pūtake-te kaiwhiwhi ka taea te wehewehe i te āhua o te wai me te momo wai.
– Hurihuri rū whenua: te huri i ngā raraunga rū whenua ki ngā tauira āhuatanga toka pēnei i te aukati oro e ngāwari ake ai te hono atu ki ngā raraunga puna.
Heoi, kāore i te motuhake ngā tohu rū whenua i ngā wā katoa. Hei tauira, ka puta pea ngā ira kanapa nā ngā huringa āhua whenua, ehara i te mea nā ngā warowaihā. Nō reira, he mea nui te whakaurunga ki ētahi atu tikanga matawhenua me ngā raraunga puna.
Tikanga Āhuatanga: Te Mārama ki ngā Puna me ngā Hanganga Nui
Ka ine te tikanga ā-papatipu i ngā rerekētanga iti o te whakaterenga ā-papatipu nā te rerekētanga o te mātotoru o te toka. I roto i te horopaki o ngā warowaihā, he tino whai hua te ā-papatipu mō:
– Te mahere o ngā takotoranga parataiao: he māmā ake ngā parataiao i te turanga tioata, nō reira ka taea te kite i ngā takotoranga matotoru hei āhuatanga rerekē o te kaha taumaha iti.
– Tāutuhia ngā hanganga ā-rohe: hei tauira, ngā tuanui tote, ngā tihi o raro whenua, ngā rohe o te puna wai rānei.
Ko ngā painga o te kaha ā-papa ko tōna whānuitanga o te taupoki me te iti ake o te utu ki te whakataurite ki te ru whenua 3D, e pai ai mō te mahere tuatahi. Ko ōna ngoikoretanga ko te iti o te taumira poutū me te taha, ā, ehara i te mea ahurei tōna whakamaoritanga (ka taea e ngā tauira kiato maha te whakaputa i ngā āhuatanga rerekē ōrite).
Tikanga Aukume: Te Whakatau i te Papa o raro me ngā Ara Hanganga
Te rangahau aukume te ine i ngā rerekētanga o te papa aukume o te Ao e pāngia ana e ngā kohuke aukume (hei tauira, te magnetite) i roto i ngā toka. I roto i te tūhuratanga warowaihā, ka whakamahia pinepinetia ngā papa aukume mō:
– Te mahere i te hohonutanga me te āhua o te papa o raro (te toka papa).
– Tāutuhia ngā hapa me ngā rārangi ā-rohe e whakahaere ana i te hanganga o te awa me ngā ara hekenga.
– Te tirotiro i ngā wāhi tirohanga: he rerekē te urupare aukume o ngā peihana oneone matotoru i ngā wāhi o raro whenua e kitea ana.
He tino whai hua ngā aukume mō ngā rangahau ā-rohe, ā, he tere te mahi (tae atu ki ngā mea aukume ā-rangi). Heoi, kāore e "kite" tika ana i ngā puna waiwaro; ko tā rātou mahi he mea nui ake ki te anga whenua ā-rohe.
Tikanga Hikohiko (EM): Tairongo ki te Wai
Ka whakamahia e ngā tikanga hiko aukume te rerekētanga o te ātete hiko o raro i te mata. He nui ake te ātete o ngā hauwaiwaro i te tote, nō reira ka taea e te EM te āwhina ki te tohu i te aroaro o ngā wai, inā koa i roto i ngā taiao moana.
Ko tētahi tikanga rongonui ko te CSEM (Controlled-Source Electromagnetic) o te moana. Ka tukuna e tēnei tikanga ngā tohu EM mai i tētahi pūtake tōia, ā, ka tuhia te urupare ki tētahi kaiwhiwhi i te papa moana. He maha ngā wā ka whakamahia te CSEM hei tāpiritanga ki ngā rangahau ru whenua mō:
– Ka whakaiti i te mōrearea o te keri i ngā wāhi e "ātaahua ana te āhua" engari kei roto he wai.
– Te tautuhi i ngā rohe ātete e rite ana ki ngā warowaihā, inā koa i roto i ngā puna onepū.
Ko ngā herenga o te EM ko te taumira kāore i te teitei pērā i te ru whenua me te aro ki ētahi āhuatanga whenua (hei tauira, te anisotropy, ngā paparanga ātete papaku) ka taea te whakararu i te whakamaoritanga.
Te Tātari Puna Ā-Ao: Te Whakatikatika me te Whakapūmau
Kia oti te keri i tētahi puna, ka noho te takiuru puna hei puna raraunga ā-whenua tino tika mō te aromatawai i ngā puna wai. Ko ētahi takiuru nui:
– Hihi kamā: e wehewehe ana i te kirikiri me te kirikiri/kāponāte.
– Ātete: ka kitea ngā rohe hauwaiwai (he ātete ake) me te whakatau tata i te mākū o te wai.
– Ngā rangitaki oro me te kiato: āwhina ki te tatau i te pūngao me te hono i ngā raraunga rū whenua mā te tahuritanga hōhonu-wā.
– Te takiuru ira-iramuna: he tairongo ki te hauwai, he mea whai hua mō te pūngao me te tautuhi hau i raro i ētahi tikanga.
Ko ngā raraunga puna te mea nui ki te huri i te whakamaoritanga rū whenua mai i te "āhua" ki te "toka me te wai." Ki te kore te whakatikatika puna, ka waiho hei whakaaroaro noa iho te mahere whenua ā-whenua.
Rerenga Mahi Mahere Waikawa Whakakotahi
I roto i ngā mahi tūhuratanga, ko te mahere warowaihā e whai ake nei:
1. Ngā rangahau ā-rohe: te kohikohinga o ngā raraunga matawhenua, raraunga aukume-papa, me te ru whenua 2-ahu hei mahere i ngā puna me ngā ariā tākaro.
2. Te whakamāramatanga o te tirohanga: te whakamāramatanga rū whenua mō ngā mahanga hanganga/papawhenua, te tātaritanga āhuatanga, me te aromatawai mōrearea.
3. Arotakenga atu: Te ru whenua 3D me/ranei te CSEM hei whakapiki i te whakapono.
4. Te keri tūhura: te whakamana tauira me te kohikohi raraunga takiuru me te matua.
5. Te Whakawhanake: te ru whenua 3D taipitopito, te wā-whakamuri (4D) mēnā e tika ana, te whakatauira i ngā puna wai, me te arotautanga whakaputa.
Ko te whāinga matua ko te waihanga i ngā mahere hanganga (hei tauira, ngā mahere hōhonutanga/runga o te puna wai), ngā mahere matotoru (isopachs), me ngā mahere āhuatanga o te puna wai (porosity, impedance, saturation relative) e pono ana hei tautoko i ngā whakataunga haumitanga me te keri.
Ngā Wero me ngā Whanaketanga o Nāianei
He maha ngā wero kua pā ki te mahere warowaihā: te haruru raraunga, te uauatanga o te whenua (te tote iti, ngā warowaihā tuwhera, ngā whitiki pana), me te koretake o te whakamaoritanga. I tēnei wā, ko ngā au o te ahumahi e anga atu ana ki:
– Te tukatuka rū whenua matatau (hei tauira, te whakaahua i raro i te tote).
– Te Hurihanga Ngaru Katoa (FWI) mō ngā tauira tere taipitopito ake.
– Te ako mīhini mō te whakarōpūtanga o ngā mata me te tango āhuatanga, me te pupuri tonu i ngā mana whakahaere matawhenua tino pakari.
– Te whakaurunga tūponotanga hei ine i te koretake, kaua ki te whakaputa noa i tētahi mahere "tino tūponotanga" kotahi.
Whakamutunga
He tukanga whānui te mahere warowaihā ā-whenua e whakakotahi ana i ngā tikanga maha hei whakamārama i te hanganga o raro i te mata, te hanganga o ngā kohatu, me ngā wai. Ko te rū whenua te taputapu matua nā tōna taumira teitei, ko te kaha ā-papa me ngā papa aukume e whakarei ake ana i te māramatanga ā-rohe, ka tāpirihia e te EM te aro ki te ātete wai, ā, ko te takiuru puna te mea e whakarato ana i te whakatikatika me te manatoko tika rawa atu. Mā te whakaurunga me te whakamārama raraunga matatika, ka taea e te ā-papa te whakaiti i te mōrearea tūhura, te whakanui ake i te angitu o te keri, me te arotau i te whanaketanga o te papa warowaihā.
Ki te hiahia koe, ka taea e au te whakarerekē i tēnei tuhinga ki tētahi horopaki motuhake (hei tauira, te whenua o Initonīhia, te moana hohonu, te arotahi rānei ki te ru whenua 3D/AVO) me te tāpiri i tētahi rārangi pukapuka me ngā tuhi kauwhata.
