title: Predicted hydrodynamic and sediment transport impacts of breakwater construction in Tauranga Harbour, New Zealand

authors: McKenzie, James Scott

subjects: hydrodynamic

abstract: The study predicted the impact of a proposed breakwater development, along the northern boundary of the Tauranga Bridge Marina, on existing hydrodynamics and sediment transport. Numerical modelling was undertaken using the DHI MIKE 21 modelling suite. A 25 m grid resolution regional hydrodynamic model of Tauranga Harbour was established to provide boundary conditions for a 4 m grid resolution local hydrodynamic model of the Stella Passage, Town Reach, and Waipu Bay region. Calibration and verification was achieved by comparing model predictions with measurements from tidal gauges and field deployed ADV instruments. A wave model was set-up to provide predictions of wave-induced sediment transport. A sediment transport model was developed to identify sediment transport pathways and areas of erosion and accretion.

A pile and panel breakwater was recommended based on predictions of reduced current velocity within the marina and a limited increase along the Sulphur Point wharf. Flow diversion and channel constriction contributed to increased maximum velocities of 10% near the Stella Passage drop-off, increased peak tide velocities of up to 0.3 m.s⁻¹ west of the breakwater, and flood jet development off the western tip of the breakwater. Increased accretion north of the drop-off was predicted in response to increased annual spring transport rates in Town Reach from <50 m³/yr/m up to 100 m³/yr/m. Increased erosion through the western side of Town Reach may result in coarser surficial sediment and a westward extension of shell lag. In the western Stella Passage, peak ebb velocities increased by 0.2 – 0.5 m.s⁻¹ and annual spring transport rates increased from <5 m³/yr/m to >10 m³/yr/m. Peak tide velocities within the marina were reduced by 0.2 – 0.5 m.s⁻¹  in the north and up to 0.2 m.s⁻¹ in the south and annual spring transport rates decreased from up to 50 m³/yr/m to predominantly <5 m³/yr/m. 

Two dredging scenarios proposed by the Port of Tauranga were also simulated. In dredging scenario one, the Stella Passage was deepened to 16.0 m below Chart Datum. Variation in flow patterns were predicted within the Stella Passage and flood velocity increased through the western side. In dredging scenario two, the dredged area and Sulphur Point wharf were extended southward into Town Reach. In the western Stella Passage, maximum flood velocity increased by 0.2 m.s⁻¹ and peak ebb velocity increased by up to 0.3 m.s⁻¹. Peak flood velocity decreased by up to 0.3 m.s⁻¹ north of the marina.  

Breakwater addition to the dredging scenario one simulation produced similar results compared with the combined breakwater and existing bathymetry simulation. The breakwater and dredging extension in scenario two, both independently acted to focus flow through west side of Town Reach. Increased erosion was predicted toward the drop-off into the dredging extension. Dredging reduced the influence of the breakwater through the western Stella Passage. The breakwater increased maximum ebb velocity by 29% for the existing bathymetry, 25% for dredging scenario one, and 20% for dredging scenario two. 

Existing sediment transport patterns in Waipu Bay were unaltered by breakwater development or the combined breakwater development and dredging and wharf extensions.

An area of high seabed elevation, in western Waipu Bay, was the preferred location for an artificial bird roost. The existing bathymetry was altered to simulate different dredge island dimensions. The recommended design was oval shaped with an east-west orientation. This design displayed consistently low annual spring transport rates of <0.1 m³/yr/m.

text: Predicted hydrodynamic and sediment transport impacts of breakwater construction in Tauranga Harbour, New Zealand The study predicted the impact of a proposed breakwater development, along the northern boundary of the Tauranga Bridge Marina, on existing hydrodynamics and sediment transport. Numerical modelling was undertaken using the DHI MIKE 21 modelling suite. A 25 m grid resolution regional hydrodynamic model of Tauranga Harbour was established to provide boundary conditions for a 4 m grid resolution local hydrodynamic model of the Stella Passage, Town Reach, and Waipu Bay region. Calibration and verification was achieved by comparing model predictions with measurements from tidal gauges and field deployed ADV instruments. A wave model was set-up to provide predictions of wave-induced sediment transport. A sediment transport model was developed to identify sediment transport pathways and areas of erosion and accretion.

A pile and panel breakwater was recommended based on predictions of reduced current velocity within the marina and a limited increase along the Sulphur Point wharf. Flow diversion and channel constriction contributed to increased maximum velocities of 10% near the Stella Passage drop-off, increased peak tide velocities of up to 0.3 m.s⁻¹ west of the breakwater, and flood jet development off the western tip of the breakwater. Increased accretion north of the drop-off was predicted in response to increased annual spring transport rates in Town Reach from <50 m³/yr/m up to 100 m³/yr/m. Increased erosion through the western side of Town Reach may result in coarser surficial sediment and a westward extension of shell lag. In the western Stella Passage, peak ebb velocities increased by 0.2 – 0.5 m.s⁻¹ and annual spring transport rates increased from <5 m³/yr/m to >10 m³/yr/m. Peak tide velocities within the marina were reduced by 0.2 – 0.5 m.s⁻¹  in the north and up to 0.2 m.s⁻¹ in the south and annual spring transport rates decreased from up to 50 m³/yr/m to predominantly <5 m³/yr/m. 

Two dredging scenarios proposed by the Port of Tauranga were also simulated. In dredging scenario one, the Stella Passage was deepened to 16.0 m below Chart Datum. Variation in flow patterns were predicted within the Stella Passage and flood velocity increased through the western side. In dredging scenario two, the dredged area and Sulphur Point wharf were extended southward into Town Reach. In the western Stella Passage, maximum flood velocity increased by 0.2 m.s⁻¹ and peak ebb velocity increased by up to 0.3 m.s⁻¹. Peak flood velocity decreased by up to 0.3 m.s⁻¹ north of the marina.  

Breakwater addition to the dredging scenario one simulation produced similar results compared with the combined breakwater and existing bathymetry simulation. The breakwater and dredging extension in scenario two, both independently acted to focus flow through west side of Town Reach. Increased erosion was predicted toward the drop-off into the dredging extension. Dredging reduced the influence of the breakwater through the western Stella Passage. The breakwater increased maximum ebb velocity by 29% for the existing bathymetry, 25% for dredging scenario one, and 20% for dredging scenario two. 

Existing sediment transport patterns in Waipu Bay were unaltered by breakwater development or the combined breakwater development and dredging and wharf extensions.

An area of high seabed elevation, in western Waipu Bay, was the preferred location for an artificial bird roost. The existing bathymetry was altered to simulate different dredge island dimensions. The recommended design was oval shaped with an east-west orientation. This design displayed consistently low annual spring transport rates of <0.1 m³/yr/m.

year: 2014

title: Attempting to capture the intangible: spirituality in state education.

authors: Fraser, Deborah

abstract: Spirituality has quietly featured in the secular school curriculum for decades but little attention was given to it until "spiritual well-being" was defined and briefly discussed in the 1999 Health and Physical Education in the New Zealand Curriculum document (Ministry of Education, 1999). The definition provided in this statement, however, is so broad ranging that it provides little clarity to teachers who are required to interpret what spirituality might mean for classroom practice. This article explores the implications of spirituality for teaching and learning in Aotearoa New Zealand. It examines several teachers' narratives of classroom experiences that reveal spiritual dimensions. In attempting to capture the intangible, these narratives provide some insights to the possibilities, both conscious and unconscious, of creating a climate that fosters spirituality.

text: Attempting to capture the intangible: spirituality in state education. Spirituality has quietly featured in the secular school curriculum for decades but little attention was given to it until "spiritual well-being" was defined and briefly discussed in the 1999 Health and Physical Education in the New Zealand Curriculum document (Ministry of Education, 1999). The definition provided in this statement, however, is so broad ranging that it provides little clarity to teachers who are required to interpret what spirituality might mean for classroom practice. This article explores the implications of spirituality for teaching and learning in Aotearoa New Zealand. It examines several teachers' narratives of classroom experiences that reveal spiritual dimensions. In attempting to capture the intangible, these narratives provide some insights to the possibilities, both conscious and unconscious, of creating a climate that fosters spirituality.

year: 2005

title: Tino rangatiratanga in health policies and practises

authors: Wihongi, Helen Annette

subjects: tino rangatiratanga

abstract: The purpose of my doctoral research was to investigate tino rangatiratanga in health policies and practises in Aotearoa. My research involved defining tino rangatiratanga and exploring the expression of tino rangatiratanga in health policy and practises. A kaupapa Māori analysis of the 1996 National Cervical Screening Programme’s Policy document was at the core of the policy investigation. The analysis involved developing a kaupapa Māori analysing framework and then analysing the 1996 National Cervical Screening Policy document for empirical and normative judgements at four discursive levels, health gains, health objectives, health goals and fundamental underlying values. A Kaupapa Māori research design drew on interdisciplinary scholarship on colonisation, Te Tiriti o Waitangi, community psychology, public policy, disability theory, feminist theory and discourse theory.

I argue that the dominance of Western cultural norms and state-directed policies were made possible by the signing of Te Tiriti o Waitangi. The signing of Te Tiriti saw Crown sovereignty being implemented and tino rangatiratanga ignored. The consequences for Māori have been disastrous with loss of land and economic base which has resulted in poor health status. I also argue that tino rangatiratanga has the potential to transform the social and political context that frame Aotearoa society. Such an approach raises a critical dilemma for the state as meaningful recognition of tino rangatiratanga requires waiving full and absolute sovereignty which currently resides in the state. Hence some scholars argue that tino rangatiratanga is a site for constructive engagement where state and Māori relationships can be renegotiated. The extent to which this potential for constructive engagement is being realised in however is inadequately explored in the scholarly literature. Exploring the relationships between tino rangatiratanga and health policies and practises as undertaken in my thesis will therefore contribute to scholarly knowledge on the subject.

The findings from the research show that tino rangatiratanga is indeed a complex, fluid, multi-faceted and context related concept. Within the context of my research, tino rangatiratanga is defined as Māori sovereignty, self determination, and positive Māori development. As a Māori value it is about mana and tapu of rangatira or leadership personified. Within policies, tino rangatiratanga has emerged through resistance and demonstration and is actualised through Tiriti legislation and policies.

The legitimation of tino rangatiratanga in cervical screening services sees Māori leadership at national, regional and local levels and Māori involvement through wide ranging consultation but the Crown still controls the policy process and therefore the outcomes. Most cervical screening services are still owned and operated by the Crown or Crown agencies.

One of the consequences of Crown control is that Māori women are still twice as likely to get cervical cancer and four times more likely to die from it. To some degree this may be the result of resource allocation and the result of discriminatory service practices but also the result of resistance to the procedure itself.

Tino rangatiratanga within cervical screening services could be strengthened through iwi ownership of some cervical screening register sites. At the time of my field work (2000) there were 14 sites, all owned and operated by Crown agents. Tino rangatiratanga could also be strengthened through funding criteria that ensure practitioners are safe to practise, through the adoption of less invasive procedures and through the legitimation of Māori healing practises such as rongoā and karakia.

Overall if tino rangatiratanga is to be given full effect within the policy domain Māori must have a well established asset base, they must be in control of the decision making making process including resource allocation, service delivery must address the diversities of Māori realities and Māori must be the recipients of policy decisions made.

text: Tino rangatiratanga in health policies and practises The purpose of my doctoral research was to investigate tino rangatiratanga in health policies and practises in Aotearoa. My research involved defining tino rangatiratanga and exploring the expression of tino rangatiratanga in health policy and practises. A kaupapa Māori analysis of the 1996 National Cervical Screening Programme’s Policy document was at the core of the policy investigation. The analysis involved developing a kaupapa Māori analysing framework and then analysing the 1996 National Cervical Screening Policy document for empirical and normative judgements at four discursive levels, health gains, health objectives, health goals and fundamental underlying values. A Kaupapa Māori research design drew on interdisciplinary scholarship on colonisation, Te Tiriti o Waitangi, community psychology, public policy, disability theory, feminist theory and discourse theory.

I argue that the dominance of Western cultural norms and state-directed policies were made possible by the signing of Te Tiriti o Waitangi. The signing of Te Tiriti saw Crown sovereignty being implemented and tino rangatiratanga ignored. The consequences for Māori have been disastrous with loss of land and economic base which has resulted in poor health status. I also argue that tino rangatiratanga has the potential to transform the social and political context that frame Aotearoa society. Such an approach raises a critical dilemma for the state as meaningful recognition of tino rangatiratanga requires waiving full and absolute sovereignty which currently resides in the state. Hence some scholars argue that tino rangatiratanga is a site for constructive engagement where state and Māori relationships can be renegotiated. The extent to which this potential for constructive engagement is being realised in however is inadequately explored in the scholarly literature. Exploring the relationships between tino rangatiratanga and health policies and practises as undertaken in my thesis will therefore contribute to scholarly knowledge on the subject.

The findings from the research show that tino rangatiratanga is indeed a complex, fluid, multi-faceted and context related concept. Within the context of my research, tino rangatiratanga is defined as Māori sovereignty, self determination, and positive Māori development. As a Māori value it is about mana and tapu of rangatira or leadership personified. Within policies, tino rangatiratanga has emerged through resistance and demonstration and is actualised through Tiriti legislation and policies.

The legitimation of tino rangatiratanga in cervical screening services sees Māori leadership at national, regional and local levels and Māori involvement through wide ranging consultation but the Crown still controls the policy process and therefore the outcomes. Most cervical screening services are still owned and operated by the Crown or Crown agencies.

One of the consequences of Crown control is that Māori women are still twice as likely to get cervical cancer and four times more likely to die from it. To some degree this may be the result of resource allocation and the result of discriminatory service practices but also the result of resistance to the procedure itself.

Tino rangatiratanga within cervical screening services could be strengthened through iwi ownership of some cervical screening register sites. At the time of my field work (2000) there were 14 sites, all owned and operated by Crown agents. Tino rangatiratanga could also be strengthened through funding criteria that ensure practitioners are safe to practise, through the adoption of less invasive procedures and through the legitimation of Māori healing practises such as rongoā and karakia.

Overall if tino rangatiratanga is to be given full effect within the policy domain Māori must have a well established asset base, they must be in control of the decision making making process including resource allocation, service delivery must address the diversities of Māori realities and Māori must be the recipients of policy decisions made.

year: 2010