title: Minimum drain setback distances to protect New Zealand wetlands: tool development

authors: Blyth, James

abstract: This report documents the development of a Wetland Drain Setback Tool (WDST) for New Zealand freshwater wetlands. The purpose of this tool is to assess the potential effects of historical and new drains on wetland ecosystems and provide guidance on appropriate setback distances to protect these ecosystems from adverse effects due to lowered water levels.

The WDST directly supports the implementation of the National Environmental Standards for Freshwater (NES-F), which were established in 2020 to protect and restore wetlands. These standards prohibit earthworks or modifications to the water cycle within or near wetlands unless exempted for specific reasons like wetland restoration. However, there is a lack of national guidance on acceptable water level declines for different wetland types.

The specific goals of this project were to develop and evaluate the viability of the WDST for New Zealand conditions and recommend subsequent steps for its development. The project involved five key steps:

1. Development of a conceptual model to evaluate how drain systems affect wetland hydrology.
2. Representation of the drain-wetland model in numerical software.
3. Collection of site-specific data to refine and validate the numerical modeling approach.
4. Application of conceptual and numerical models to a hypothetical drain development scenario.
5. Development of two national-scale datasets on hydraulic conductivity and Land Surface Recharge to provide input data in the absence of site measurements.

The conceptual model simplifies wetland hydrology affected by drainage, reducing the need for complex modeling at each wetland. Numerical modeling was done using COMSOL Multiphysics, integrating complex governing equations like groundwater flow.

Site-specific data collection and model calibration were carried out at wetlands in different regions. Satisfactory model calibrations were achieved, indicating the suitability of the drainage model for predicting water level responses.

A hypothetical land development scenario near a wetland on the Kāpiti Coast was tested to demonstrate how the WDST could be applied. Various scenarios indicated lateral setback distances to ensure minimal change in wetland water levels.

Overall, the report concludes that a national tool to estimate drainage effects near wetlands is feasible. It recommends further refinement, including verification at additional wetlands and data collection for input parameters. The tool could potentially be developed into a web-based application, supported by technical guidance material, to assist users in protecting wetland ecosystems through appropriate drainage setback distances.

text: Minimum drain setback distances to protect New Zealand wetlands: tool development This report documents the development of a Wetland Drain Setback Tool (WDST) for New Zealand freshwater wetlands. The purpose of this tool is to assess the potential effects of historical and new drains on wetland ecosystems and provide guidance on appropriate setback distances to protect these ecosystems from adverse effects due to lowered water levels.

The WDST directly supports the implementation of the National Environmental Standards for Freshwater (NES-F), which were established in 2020 to protect and restore wetlands. These standards prohibit earthworks or modifications to the water cycle within or near wetlands unless exempted for specific reasons like wetland restoration. However, there is a lack of national guidance on acceptable water level declines for different wetland types.

The specific goals of this project were to develop and evaluate the viability of the WDST for New Zealand conditions and recommend subsequent steps for its development. The project involved five key steps:

1. Development of a conceptual model to evaluate how drain systems affect wetland hydrology.
2. Representation of the drain-wetland model in numerical software.
3. Collection of site-specific data to refine and validate the numerical modeling approach.
4. Application of conceptual and numerical models to a hypothetical drain development scenario.
5. Development of two national-scale datasets on hydraulic conductivity and Land Surface Recharge to provide input data in the absence of site measurements.

The conceptual model simplifies wetland hydrology affected by drainage, reducing the need for complex modeling at each wetland. Numerical modeling was done using COMSOL Multiphysics, integrating complex governing equations like groundwater flow.

Site-specific data collection and model calibration were carried out at wetlands in different regions. Satisfactory model calibrations were achieved, indicating the suitability of the drainage model for predicting water level responses.

A hypothetical land development scenario near a wetland on the Kāpiti Coast was tested to demonstrate how the WDST could be applied. Various scenarios indicated lateral setback distances to ensure minimal change in wetland water levels.

Overall, the report concludes that a national tool to estimate drainage effects near wetlands is feasible. It recommends further refinement, including verification at additional wetlands and data collection for input parameters. The tool could potentially be developed into a web-based application, supported by technical guidance material, to assist users in protecting wetland ecosystems through appropriate drainage setback distances.

year: 2023-07-01

title: Greenstone: A comprehensive open-source digital library software system

authors: Witten, Ian H.

subjects: computer science

abstract: This paper describes the Greenstone digital library software, a comprehensive, open-source system for the construction and presentation of information collections. Collections built with Greenstone offer effective full-text searching and metadata-based browsing facilities that are attractive and easy to use. Moreover, they are easily maintainable and can be augmented and rebuilt entirely automatically. The system is extensible: software "plugins" accommodate different document and metadata types.

text: Greenstone: A comprehensive open-source digital library software system This paper describes the Greenstone digital library software, a comprehensive, open-source system for the construction and presentation of information collections. Collections built with Greenstone offer effective full-text searching and metadata-based browsing facilities that are attractive and easy to use. Moreover, they are easily maintainable and can be augmented and rebuilt entirely automatically. The system is extensible: software "plugins" accommodate different document and metadata types.

year: 2000

title: Te Kauwhanganui o Tāwhiao

authors: Teinakore, Tiare Kata

abstract: Wiremu Tarapīpipi Te Waharoa Tamihana: Kaiwhakawahi Kīngi

I te tau 1892 i kite a Tāwhiao i te hinga mai o te iwi Māori i te rau o te patu a te Pākehā, ka whakatūngia mai ko tōna whare pāremata a Te Kauwhanganui hei pīkau i ēnei taumahatanga. He whare pāremata tēnei i whakatūngia mai i te rohe tonu o Ngāti Hauā, he whare pāremata mō ngā iwi Māori puta noa i Aotearoa, he whare whakatau nawe, he whare whakature kaupapa, he punanga tēnei mō te iwi Māori. Ko Te Kauwhanganui te tāhuhu o tēnei tuhinga whakapae, engari, ko te aronga nui, ko te takenga mai o Te Kauwhanganui i tēwhea ao, te ao Māori, te ao Pākehā rānei? I konei mahuta mai ai ko te kaupapa matua o tēnei tuhinga.
“I pūtake mai Te Kauwhanganui o Tāwhiao i te ao Māori tūturu, i ngā whakaaweawe rānei o te mana whakahaere o te Pākehā?”
Ko tēnei kaupapa ka rukuhia atu mā te huri kōaro ki te rangahau i te mana whakahaere o te ao Māori tūturu. Ka rangahautia ko te mana whakahaere o te iwi Māori i mua i te taenga mai o te Pākehā, kia mahea ai te kite he aha rā ngā tikanga o te ao Māori tūturu. Ka hūpeke atu ki te taenga mai o te Pākehā ki Aotearoa, ka whakaatu i ngā whakaaweawe mana whakahaere o te Pākehā i tōia mai e te Pākehā, ko Te Tiriti o Waitangi, ko Te Kawenata motuhake o Aotearoa ēnei. Ka whakaatu hoki i te pānga o ēnei whakaaweawe ki ngā kōkiritanga, ki ngā whakahoki a te Māori ki Te Tiriti o Waitangi me Te Kawenata motuhake o Aotearoa. Kātahi ka whakamāramahia ngā tikanga o Te Kauwhanganui me te tautoko o ngā pou kōrero i ēnei whakamārama. Ka whakamutua ake me te tātari i ngā hua o ēnei kimihanga, kia taea te kite ko tēwhea te ao ka pūtake mai Te Kauwhanganui, mai i te ao Māori tūturu, mai i ngā whakaaweawe rānei o te mana whakahaere o te Pākehā.

text: Te Kauwhanganui o Tāwhiao Wiremu Tarapīpipi Te Waharoa Tamihana: Kaiwhakawahi Kīngi

I te tau 1892 i kite a Tāwhiao i te hinga mai o te iwi Māori i te rau o te patu a te Pākehā, ka whakatūngia mai ko tōna whare pāremata a Te Kauwhanganui hei pīkau i ēnei taumahatanga. He whare pāremata tēnei i whakatūngia mai i te rohe tonu o Ngāti Hauā, he whare pāremata mō ngā iwi Māori puta noa i Aotearoa, he whare whakatau nawe, he whare whakature kaupapa, he punanga tēnei mō te iwi Māori. Ko Te Kauwhanganui te tāhuhu o tēnei tuhinga whakapae, engari, ko te aronga nui, ko te takenga mai o Te Kauwhanganui i tēwhea ao, te ao Māori, te ao Pākehā rānei? I konei mahuta mai ai ko te kaupapa matua o tēnei tuhinga.
“I pūtake mai Te Kauwhanganui o Tāwhiao i te ao Māori tūturu, i ngā whakaaweawe rānei o te mana whakahaere o te Pākehā?”
Ko tēnei kaupapa ka rukuhia atu mā te huri kōaro ki te rangahau i te mana whakahaere o te ao Māori tūturu. Ka rangahautia ko te mana whakahaere o te iwi Māori i mua i te taenga mai o te Pākehā, kia mahea ai te kite he aha rā ngā tikanga o te ao Māori tūturu. Ka hūpeke atu ki te taenga mai o te Pākehā ki Aotearoa, ka whakaatu i ngā whakaaweawe mana whakahaere o te Pākehā i tōia mai e te Pākehā, ko Te Tiriti o Waitangi, ko Te Kawenata motuhake o Aotearoa ēnei. Ka whakaatu hoki i te pānga o ēnei whakaaweawe ki ngā kōkiritanga, ki ngā whakahoki a te Māori ki Te Tiriti o Waitangi me Te Kawenata motuhake o Aotearoa. Kātahi ka whakamāramahia ngā tikanga o Te Kauwhanganui me te tautoko o ngā pou kōrero i ēnei whakamārama. Ka whakamutua ake me te tātari i ngā hua o ēnei kimihanga, kia taea te kite ko tēwhea te ao ka pūtake mai Te Kauwhanganui, mai i te ao Māori tūturu, mai i ngā whakaaweawe rānei o te mana whakahaere o te Pākehā.

year: 2013