title: Editorial Introduction: The utility and futility of 'the nation' in histories of Aotearoa New Zealand.

authors: Coleborne, Catharine

subjects: New Zealand

abstract: An introduction is presented which discusses articles in the issue on New Zealand history, including one on interracial rape and sexual violence in the 1860s, one on postcolonial methodology and the historical concept of the British World, and one on Whanganui Māori claims to the Whanganui River.

text: Editorial Introduction: The utility and futility of 'the nation' in histories of Aotearoa New Zealand. An introduction is presented which discusses articles in the issue on New Zealand history, including one on interracial rape and sexual violence in the 1860s, one on postcolonial methodology and the historical concept of the British World, and one on Whanganui Māori claims to the Whanganui River.

year: 2011

title: Mainstreaming managed retreat in Aotearoa New Zealand [Policy Brief]

authors: Hanna, Christina Jane

abstract: Retreat in Aotearoa has evolved from early indigenous practices which saw relocation from harm as a viable option, to the onset of colonisation and more protection-based approaches, to more passive policy that acknowledged the option of retreat but provided little guidance or implementation support, to today, when retreat is becoming a strategic part of our national risk management framework.

text: Mainstreaming managed retreat in Aotearoa New Zealand [Policy Brief] Retreat in Aotearoa has evolved from early indigenous practices which saw relocation from harm as a viable option, to the onset of colonisation and more protection-based approaches, to more passive policy that acknowledged the option of retreat but provided little guidance or implementation support, to today, when retreat is becoming a strategic part of our national risk management framework.

year: 2023-04

title: An expression for land surface water storage monitoring using a two-formation geological weighing lysimeter

authors: Bardsley, W. Earl

subjects: weighing lysimeter

abstract: Field studies have demonstrated that ground surface rainfall accumulation can be detected at depth by synchronous increases in static confined groundwater pore pressures. This opens the way for “geological weighing lysimeters” providing disturbance-free water storage monitoring of the surface environment, in effect by weighing a significant land area in real time. Such systems require specific hydrogeological conditions, which are not easily verified by field observations and replicated observations from multiple geological formations are a prerequisite for quality control. Given replication over two monitored formations, we introduce an expression which utilises the respective formation piezometric water levels to give an improved combined estimate of the ground surface water budget. The expression utilises raw piezometric levels and has the advantage of direct correction for Earth tide noise, which may sometimes be influenced by local effects in addition to the pure solar/lunar tidal potential. The expression is particularly simple, if the two formations have similar (but possibly unknown) undrained Poisson ratios and porosities. Surface water budgets can then be estimated using only the respective formation barometric coefficients and piezometric levels. An example application to two vertically separated confined aquifers at a New Zealand site indicate an improved accuracy over single-formation observations. The two-formation expression for surface storage could find use as an accurate water budget tool with particular application to monitoring diffuse hydrological systems such as wetlands, arid regions, and heavily forested localities.

text: An expression for land surface water storage monitoring using a two-formation geological weighing lysimeter Field studies have demonstrated that ground surface rainfall accumulation can be detected at depth by synchronous increases in static confined groundwater pore pressures. This opens the way for “geological weighing lysimeters” providing disturbance-free water storage monitoring of the surface environment, in effect by weighing a significant land area in real time. Such systems require specific hydrogeological conditions, which are not easily verified by field observations and replicated observations from multiple geological formations are a prerequisite for quality control. Given replication over two monitored formations, we introduce an expression which utilises the respective formation piezometric water levels to give an improved combined estimate of the ground surface water budget. The expression utilises raw piezometric levels and has the advantage of direct correction for Earth tide noise, which may sometimes be influenced by local effects in addition to the pure solar/lunar tidal potential. The expression is particularly simple, if the two formations have similar (but possibly unknown) undrained Poisson ratios and porosities. Surface water budgets can then be estimated using only the respective formation barometric coefficients and piezometric levels. An example application to two vertically separated confined aquifers at a New Zealand site indicate an improved accuracy over single-formation observations. The two-formation expression for surface storage could find use as an accurate water budget tool with particular application to monitoring diffuse hydrological systems such as wetlands, arid regions, and heavily forested localities.

year: 2007