title: Riparian zone as a variable source area for the estimation of evapotranspiration through the analysis of daily fluctuations in streamflow

authors: Sarwar, Muhammad Waqas

subjects: baseflow

abstract: Evapotranspiration is a critical component of the water balance of a catchment, and riparian zones play a crucial role in the hydrological process. However, the influence of riparian zones on evapotranspiration, especially at a catchment scale, needs more investigation. Since evapotranspiration is negligible at night, the difference in recharge between day and night generates diurnal fluctuations in streamflows. A new method is developed to estimate riparian evapotranspiration by analysing the streamflow response to diurnal evapotranspiration. The potential evapotranspiration (PET) calculated by FAO-56 is used as a true reference for validation. The estimated evapotranspiration shows acceptable goodness of fit with the hourly PET calculated from FAO 56. However, the new approach estimates average evapotranspiration across the entire riparian area than a point observation and provides a better understanding of the impact of the riparian zone on streamflow patterns.

text: Riparian zone as a variable source area for the estimation of evapotranspiration through the analysis of daily fluctuations in streamflow Evapotranspiration is a critical component of the water balance of a catchment, and riparian zones play a crucial role in the hydrological process. However, the influence of riparian zones on evapotranspiration, especially at a catchment scale, needs more investigation. Since evapotranspiration is negligible at night, the difference in recharge between day and night generates diurnal fluctuations in streamflows. A new method is developed to estimate riparian evapotranspiration by analysing the streamflow response to diurnal evapotranspiration. The potential evapotranspiration (PET) calculated by FAO-56 is used as a true reference for validation. The estimated evapotranspiration shows acceptable goodness of fit with the hourly PET calculated from FAO 56. However, the new approach estimates average evapotranspiration across the entire riparian area than a point observation and provides a better understanding of the impact of the riparian zone on streamflow patterns.

year: 2022-09-23

title: A critical challenge: Developing student's critical abilities

authors: Gillespie, Lorna B.

abstract: The work of educators includes grappling with the challenges of bringing theoretical concepts and approaches into day-to-day physical education practice for quality programmes and the betterment of student learning. One of our most exciting challenges is in capturing the potential the Health and Physical Education in the New Zealand Curriculum (MoE, 1999) and the New Zealand Curriculum (MoE, 2007) present to us as physical educators. The curriculum has encouraged the development of socio-critical perspectives and inquirybased approaches to teaching and learning programmes (Culpan & Bruce, 2007; Fitzpatrick, 2010; Gillespie & Culpan, 2000; Wright, 2004). We (the writers) have tackled the theory to practice challenge of the development of student’s critical abilities from a range of positions within education. Our involvement in initial teacher education, teacher professional development, secondary physical education teaching and physical education advisory roles has meant we have needed to not only develop our own practice as educators, but also consider how to successfully enable secondary school students, teacher education students and practicing physical education teachers to understand and implement a socio-critical physical education curriculum. This paper focuses on processes, knowledge and understandings that support the development of student’s critical abilities.

text: A critical challenge: Developing student's critical abilities The work of educators includes grappling with the challenges of bringing theoretical concepts and approaches into day-to-day physical education practice for quality programmes and the betterment of student learning. One of our most exciting challenges is in capturing the potential the Health and Physical Education in the New Zealand Curriculum (MoE, 1999) and the New Zealand Curriculum (MoE, 2007) present to us as physical educators. The curriculum has encouraged the development of socio-critical perspectives and inquirybased approaches to teaching and learning programmes (Culpan & Bruce, 2007; Fitzpatrick, 2010; Gillespie & Culpan, 2000; Wright, 2004). We (the writers) have tackled the theory to practice challenge of the development of student’s critical abilities from a range of positions within education. Our involvement in initial teacher education, teacher professional development, secondary physical education teaching and physical education advisory roles has meant we have needed to not only develop our own practice as educators, but also consider how to successfully enable secondary school students, teacher education students and practicing physical education teachers to understand and implement a socio-critical physical education curriculum. This paper focuses on processes, knowledge and understandings that support the development of student’s critical abilities.

year: 2014

title: Walking into the past to explore the future: Utulizing larval densities to measure the effects of two climate change factors, temperature and salinity on Poorohe (common smelt, Retropinna retropinna) abundance in Te Puuaha o Waikato

authors: Robcke, Sidney

subjects: Common smelt

abstract: Poorohe (common smelt, Retropinna retropinna) are a highly valued kai species in Te Puuaha o Waikato (the lower 66 km of the Waikato River). Fisher whaanau have observed changes in the amount Poorohe that are harvested during annual fish harvests. Since Poorohe are particularly vulnerable to environmental changes, whaanau are particularly concerned about the how climate change might impact Poorohe populations. Climate change vulnerability assessments (CCVA) currently exist for several native New Zealand fish freshwater species; however, one does not yet exist for Poorohe. Previous larval distribution studies in the lower Waikato River only sampled as far downstream as Tuakau bridge (approximately 45km from the river mouth). These studies indicated that important spawning habitats likely existed downstream of Tuakau bridge. Temperature increases and saltwater intrusion have been identified as two climate change factors that will likely impact Poorohe in Te Puuaha o Waikato, because ambient temperatures have increased since the industrial revolution and the proximity of the study area to the ocean. A literature review was used to explore the experiences of fisher whaanau through the past, present and how the experiences will continue to change in a changing climate. The effects of temperature and saltwater intrusion on Poorohe populations were explored through replicating the methods of past research carried out in the 1980s and 2010s. Current river temperatures are in the optimal temperature range (12°C - 18°C) for Poorohe spawning. The saltwater wedge was suppressed by the high river flow during the eight-week sampling period, and it is unclear whether saltwater intrusion has an impact on Poorohe spawning. Larval densities did not significantly increase down river, which suggests large spawning habitat is not found downstream of Tuakau bridge. Furthermore, there were no decreases in larval densities in the two saltwater sites. This study has contributed to the available literature necessary to develop a CCVA for Poorohe and explored the cultural heritage of traditionally significant practices in Te Puuaha o Waikato relating to Poorohe.

text: Walking into the past to explore the future: Utulizing larval densities to measure the effects of two climate change factors, temperature and salinity on Poorohe (common smelt, Retropinna retropinna) abundance in Te Puuaha o Waikato Poorohe (common smelt, Retropinna retropinna) are a highly valued kai species in Te Puuaha o Waikato (the lower 66 km of the Waikato River). Fisher whaanau have observed changes in the amount Poorohe that are harvested during annual fish harvests. Since Poorohe are particularly vulnerable to environmental changes, whaanau are particularly concerned about the how climate change might impact Poorohe populations. Climate change vulnerability assessments (CCVA) currently exist for several native New Zealand fish freshwater species; however, one does not yet exist for Poorohe. Previous larval distribution studies in the lower Waikato River only sampled as far downstream as Tuakau bridge (approximately 45km from the river mouth). These studies indicated that important spawning habitats likely existed downstream of Tuakau bridge. Temperature increases and saltwater intrusion have been identified as two climate change factors that will likely impact Poorohe in Te Puuaha o Waikato, because ambient temperatures have increased since the industrial revolution and the proximity of the study area to the ocean. A literature review was used to explore the experiences of fisher whaanau through the past, present and how the experiences will continue to change in a changing climate. The effects of temperature and saltwater intrusion on Poorohe populations were explored through replicating the methods of past research carried out in the 1980s and 2010s. Current river temperatures are in the optimal temperature range (12°C - 18°C) for Poorohe spawning. The saltwater wedge was suppressed by the high river flow during the eight-week sampling period, and it is unclear whether saltwater intrusion has an impact on Poorohe spawning. Larval densities did not significantly increase down river, which suggests large spawning habitat is not found downstream of Tuakau bridge. Furthermore, there were no decreases in larval densities in the two saltwater sites. This study has contributed to the available literature necessary to develop a CCVA for Poorohe and explored the cultural heritage of traditionally significant practices in Te Puuaha o Waikato relating to Poorohe.

year: 2024-11-23