title: Cautionary note on multi-component flood distributions for annual maxima

authors: Bardsley, W. Earl

subjects: flood maxima

abstract: Multi-component probability distributions such as the two-component Gumbel distribution are sometimes applied to annual flood maxima when individual floods are seen as belonging to different classes, depending on physical processes or time of year. However, hydrological inconsistencies may arise if only non-classified annual maxima are available to estimate the component distribution parameters. In particular, an unconstrained best fit to annual flood maxima may yield some component distributions with a high probability of simulating floods with negative discharge. In such situations multi-component distributions cannot be justified as an improved approximation to a local physical reality of mixed flood types, even though a good data fit is achieved. This effect usefully illustrates that a good match to data is no guarantee against degeneracy of hydrological models.

text: Cautionary note on multi-component flood distributions for annual maxima Multi-component probability distributions such as the two-component Gumbel distribution are sometimes applied to annual flood maxima when individual floods are seen as belonging to different classes, depending on physical processes or time of year. However, hydrological inconsistencies may arise if only non-classified annual maxima are available to estimate the component distribution parameters. In particular, an unconstrained best fit to annual flood maxima may yield some component distributions with a high probability of simulating floods with negative discharge. In such situations multi-component distributions cannot be justified as an improved approximation to a local physical reality of mixed flood types, even though a good data fit is achieved. This effect usefully illustrates that a good match to data is no guarantee against degeneracy of hydrological models.

year: 2016

title: What is the Proposed District Plan proposal?

authors: Dagg, Liam

abstract: Liam Dagg is the Planning Services Manager at the Rotorua District Council. He has been with Council since 2005 and before taking up the role as manager was the team leader policy. The district plan review as a public process was commenced under his supervision in late 2007. Producing a district plan that delivers meaningful options around land use change for lake water quality has been a major feature of the review process, with lake water quality identified as one of the important issues the community wants the next generation district plan to deliver on.

text: What is the Proposed District Plan proposal? Liam Dagg is the Planning Services Manager at the Rotorua District Council. He has been with Council since 2005 and before taking up the role as manager was the team leader policy. The district plan review as a public process was commenced under his supervision in late 2007. Producing a district plan that delivers meaningful options around land use change for lake water quality has been a major feature of the review process, with lake water quality identified as one of the important issues the community wants the next generation district plan to deliver on.

year: 2013

title: The Waikato River settlement: Exploring a model for co-management and protection of natural and cultural resources

authors: Te Aho, Linda

abstract: This presentation explores co-management regimes in Aotearoa, including the framework established under the Waikato River Settlement, which mandates the protection and restoration of the river’s health and well being for present and future generations.

text: The Waikato River settlement: Exploring a model for co-management and protection of natural and cultural resources This presentation explores co-management regimes in Aotearoa, including the framework established under the Waikato River Settlement, which mandates the protection and restoration of the river’s health and well being for present and future generations.

year: 2015