title: Mass movement in Tangoio conservation reserve northern Hawkes Bay

authors: Eyles, R.J.

abstract: In a random sample of 52 valley-side profiles at Tangoio, mass movements are shown to occur preferentially on profiles with a northerly aspect, which are long, or steeply sloping.
Detailed measurements of 27 debris slide and two slump scars dating from a storm in May 1971 enable an estimate of the rate of erosion of loess and volcanic ash from valley-sides to be made. Valley-side slopes are changing from a convexo-concave equilibrium form under the original forest towards a new, more rectilinear equilibrium form under grass.

text: Mass movement in Tangoio conservation reserve northern Hawkes Bay In a random sample of 52 valley-side profiles at Tangoio, mass movements are shown to occur preferentially on profiles with a northerly aspect, which are long, or steeply sloping.
Detailed measurements of 27 debris slide and two slump scars dating from a storm in May 1971 enable an estimate of the rate of erosion of loess and volcanic ash from valley-sides to be made. Valley-side slopes are changing from a convexo-concave equilibrium form under the original forest towards a new, more rectilinear equilibrium form under grass.

year: 1971

title: Formation of magnetite-enriched zones in and offshore of a mesotidal estuarine lagoon: An environmental magnetic study of Tauranga Harbour and Bay of Plenty, New Zealand

authors: Badesab, Firoz

subjects: environmental magnetism

abstract: Magnetic iron minerals are widespread and indicative sediment constituents in estuarine, coastal and shelf systems. We combine environmental magnetic, sedimentological and numerical methods to identify magnetite-enriched placer-like zones in a complex coastal system and delineate their formation mechanisms. Magnetic susceptibility and remanence measurements on 245 surficial sediment samples collected in and around Tauranga Harbour, the largest barrier-enclosed tidal estuary of New Zealand, reveal several discrete enrichment zones controlled by local hydrodynamic conditions. Active magnetite enrichment takes place in tidal channels, which feed into two coast-parallel nearshore magnetite-enriched belts centered at water depths of 6–10 m and 10–20 m. A close correlation between magnetite content and magnetic grain size was found, where higher susceptibility values are associated within coarser magnetic crystal sizes. Two key mechanisms for magnetite enrichment are identified. First, tide-induced residual currents primarily enable magnetite enrichment within the estuarine channel network. A coast-parallel, fine sand magnetite enrichment belt in water depths of less than 10 m along the barrier island has a strong decrease in magnetite content away from the southern tidal inlet and is apparently related to active coast-parallel transport combined with mobilizing surf zone processes. A second, less pronounced, but more uniform magnetite enrichment belt at 10–20 m water depth is composed of non-mobile, medium-coarse-grained relict sands, which have been reworked during post-glacial sea level transgression. We demonstrate the potential of magnetic methods to reveal and differentiate coastal magnetite enrichment patterns and investigate their formative mechanisms.

text: Formation of magnetite-enriched zones in and offshore of a mesotidal estuarine lagoon: An environmental magnetic study of Tauranga Harbour and Bay of Plenty, New Zealand Magnetic iron minerals are widespread and indicative sediment constituents in estuarine, coastal and shelf systems. We combine environmental magnetic, sedimentological and numerical methods to identify magnetite-enriched placer-like zones in a complex coastal system and delineate their formation mechanisms. Magnetic susceptibility and remanence measurements on 245 surficial sediment samples collected in and around Tauranga Harbour, the largest barrier-enclosed tidal estuary of New Zealand, reveal several discrete enrichment zones controlled by local hydrodynamic conditions. Active magnetite enrichment takes place in tidal channels, which feed into two coast-parallel nearshore magnetite-enriched belts centered at water depths of 6–10 m and 10–20 m. A close correlation between magnetite content and magnetic grain size was found, where higher susceptibility values are associated within coarser magnetic crystal sizes. Two key mechanisms for magnetite enrichment are identified. First, tide-induced residual currents primarily enable magnetite enrichment within the estuarine channel network. A coast-parallel, fine sand magnetite enrichment belt in water depths of less than 10 m along the barrier island has a strong decrease in magnetite content away from the southern tidal inlet and is apparently related to active coast-parallel transport combined with mobilizing surf zone processes. A second, less pronounced, but more uniform magnetite enrichment belt at 10–20 m water depth is composed of non-mobile, medium-coarse-grained relict sands, which have been reworked during post-glacial sea level transgression. We demonstrate the potential of magnetic methods to reveal and differentiate coastal magnetite enrichment patterns and investigate their formative mechanisms.

year: 2012

title: Whakahokia te reo ki tōna taioretanga: He rautaki reo mō Waikato-Tainui

authors: Roa, Raukura

subjects: Whakaora reo

abstract: Ko te kaupapa o tēnei pepa, ko te whakatakoto i tētehi mahere rautaki hei whakakaha, hei whakapakari i te reo Māori o te iwi o Waikato-Tainui. Ehara tēnei i te pepa wetewete i te rautaki whakaora reo, ehara hoki i te pepa tātari i ngā rautaki whakaora reo o te ao. Engari ia, he pepa whakatakoto i ōku whakaaro mō tētehi huarahi e ora ai te reo o Waikato-Tainui. Kei te rārangi whakapuakanga ētehi rauemi i toro atu ai au, heoi, kāore i āta tātarihia mō tēnei pepa. Nō reira, e rima ngā wāhanga o tēnei pepa. Ko te wāhanga tuatahi, he whakakaupapa i tēnei rautaki. Ko te wāhanga tuarua, he whakamārama i ngā whakahaeretanga o te iwi. Ko te wāhanga tuatoru, he whakatakoto i ngā whāinga o te rautaki. Ko te wāhanga tuawhā, he whakatakoto i te mahere e tutuki ai ngā whāinga o te rautaki. Ka mutu he whakatakoto whakaaro atu anō kāore i whakauru ki roto i te rautaki.

text: Whakahokia te reo ki tōna taioretanga: He rautaki reo mō Waikato-Tainui Ko te kaupapa o tēnei pepa, ko te whakatakoto i tētehi mahere rautaki hei whakakaha, hei whakapakari i te reo Māori o te iwi o Waikato-Tainui. Ehara tēnei i te pepa wetewete i te rautaki whakaora reo, ehara hoki i te pepa tātari i ngā rautaki whakaora reo o te ao. Engari ia, he pepa whakatakoto i ōku whakaaro mō tētehi huarahi e ora ai te reo o Waikato-Tainui. Kei te rārangi whakapuakanga ētehi rauemi i toro atu ai au, heoi, kāore i āta tātarihia mō tēnei pepa. Nō reira, e rima ngā wāhanga o tēnei pepa. Ko te wāhanga tuatahi, he whakakaupapa i tēnei rautaki. Ko te wāhanga tuarua, he whakamārama i ngā whakahaeretanga o te iwi. Ko te wāhanga tuatoru, he whakatakoto i ngā whāinga o te rautaki. Ko te wāhanga tuawhā, he whakatakoto i te mahere e tutuki ai ngā whāinga o te rautaki. Ka mutu he whakatakoto whakaaro atu anō kāore i whakauru ki roto i te rautaki.

year: 2011