A half-day workshop providing explanation and examples of the concepts described in the recently released NZ River Managers SIG – Room for the River guidelines. The technical basis for the Room for the River concept will be explained along with examples of the methodology that can be used to determine river management lines and agreed intervention protocols to facilitate effective implementation.
Where
Wellington
When
Friday 19 April 2024
Time
10:00am-3:00pm
Cost
$500 + GST
$400 + GST (council staff rate)
How to register
To register email Rachael.Armstrong@hbrc.govt.nz
Key themes
- What is Room for the River
- How can it be used to manage flood and erosion risks within the context of climate change and Te mana o te wai
- How to determine river management design lines
- Interventions and dealing with critical assets within the river management design lines
- Implementation enablers including planning controls
Outcomes
A better understanding of how to derive river management design lines and how they can be implemented to achieve Room for the River outcomes.
Who would benefit?
Local authority engineers and asset managers, consultants and contractors actively involved in river management, or who have a specific interest in and experience of rivers and their management.
Presenter
Kyle Christensen - River Engineering Consultant
Council Monthly Catch ups:
Let's connect, share an idea, talk about issues and work on solutions as a team.
Followed by networking.
Presenter, Megan Rowland, Otago Regional Council
Megan is keen to discuss ideas on how others manage sediment when undertaking instream or bank/bed work. We are especially interested in ideas around instream sediment control in larger or higher flow rivers.
In a nutshell we can have no conspicuous change in colour in colour and visual clarity downstream – with a change being more than 40% on clarity tube reading at the following distances downstream:
- 200 metres if we are operating under permitted activity rules
- 300 metres if we are operating under the consent for most river
- 500 metres if we are operating under the consent for certain large rivers
We also have a prohibited rule we must take into consideration that states that:
Any discharge of sediment from disturbed land to water in any:
- Lake, river or Regionally Significant Wetland; or
- Drain or water race that flows to a lake, river, Regionally Significant Wetland or coastal marine area, where no measure is taken to mitigate sediment runoff, is a prohibited activity.
To join email rachael.armstrong@hbrc.govt.nz
There is clear evidence that upfront investment in risk management can save millions. All councils have at some point dealt with an extreme weather event first hand. As these events become more common, adaptation to protect lives and livelihoods is becoming more important. Adaptation involves a multi-tool response that considers not only infrastructure, but also ensuring development does not occur in high risk areas, working through how to reduce the consequences of flood and where appropriate looking at retreat. Internationally, this multi-tool approach is recognised as the PARA approach (Protect, Accommodate, Retreat, and Avoid), and is endorsed locally by the National Emergency Management Agency (NEMA), the Department of Internal Affairs, and the Ministry for the Environment in improving our flood resilience from pluvial and fluvial flooding. The PARA Framework was a key component of our Before the Deluge Business case.
This session will discuss the PARA approach and look at case studies of how three different councils are integrating this into how they work. This is a journey we are all on and participants will get the opportunity to ask questions and share their experiences, challenges and learnings working with this approach.
The workshop will be led by Graeme Campbell (GWRC), Leigh Griffiths (ECAN) and Julie Beaufill (Waikato). Guest speaker Paul Barker, DIA.
*COUNCIL ONLY WORKSHOP* - Book out a conference room and get your team together.
*LIMITED SPACES*
Contact rachael.armstrong@hbrc.govt.nz to register for this online training.
Date: 10 May 2024
Location: Wellington
Time: 10am-3pm
Cost: $500 plus GST. Council rate – $400 plus GST
A workshop for designing rock revetments and groynes for river works
A half-day workshop providing details of best practice methods for designing rock for use in river works. A high-level introduction to geomorphology will be provided for the purpose of understanding how rock works can affect river processes as well as key concepts affecting general scour design. A summary of tools for quantifying hydrological and hydraulic design parameters will be presented followed by guidance on when rock should be considered as a management tool. The design process will then be explained for rock revetments (rock lines) and groynes including general arrangement geometry, sizing, filters, and specifications. Examples will be provided of recent projects including where design/cost/maintenance trade-offs were considered.
Key themes
- Brief introduction to geomorphology – how rivers work
- Outline tools for quantifying key design inputs – hydrology, hydraulics
- When to use rock
- General arrangement geometry for groynes & revetments
- Estimating general scour (geomorphic change)
- Estimating local scour
- Sizing rock using three different methods
- Design of granular and geotextile filters
- Key specifications for rock
Outcomes
A better understanding of designing rocks for use in river works.
Who would benefit?
Local authority engineers and asset managers, consultants and contractors actively involved in river management, or who have a specific interest in and experience of rivers and their management.
Presenter
Kyle Christensen - River Engineering Consultant
Spaces limited
To register email Rachael.Armstrong@hbrc.govt.nz
A half-day workshop providing explanation and examples of the concepts described in the recently released NZ River Managers SIG – Room for the River guidelines. The technical basis for the Room for the River concept will be explained along with examples of the methodology that can be used to determine river management lines and agreed intervention protocols to facilitate effective implementation.
Where
Christchurch
When
Wednesday 3 July 2024
Time
1.00pm-5:00pm
Cost
$400 + GST
$400 + GST (council staff rate)
How to register
To register email Rachael.Armstrong@hbrc.govt.nz
Key themes
- What is Room for the River
- How can it be used to manage flood and erosion risks within the context of climate change and Te mana o te wai
- How to determine river management design lines
- Interventions and dealing with critical assets within the river management design lines
- Implementation enablers including planning controls
Outcomes
A better understanding of how to derive river management design lines and how they can be implemented to achieve Room for the River outcomes.
Who would benefit?
Local authority engineers and asset managers, consultants and contractors actively involved in river management, or who have a specific interest in and experience of rivers and their management.
Presenter
Kyle Christensen - River Engineering Consultant
Date: Friday 12 July 2024
Location: Wellington
Time: 10am-3pm
Cost: $500 plus GST. Council rate – $400 plus GST
A workshop for designing rock revetments and groynes for river works
A half-day workshop providing details of best practice methods for designing rock for use in river works. A high-level introduction to geomorphology will be provided for the purpose of understanding how rock works can affect river processes as well as key concepts affecting general scour design. A summary of tools for quantifying hydrological and hydraulic design parameters will be presented followed by guidance on when rock should be considered as a management tool. The design process will then be explained for rock revetments (rock lines) and groynes including general arrangement geometry, sizing, filters, and specifications. Examples will be provided of recent projects including where design/cost/maintenance trade-offs were considered.
Key themes
- Brief introduction to geomorphology – how rivers work
- Outline tools for quantifying key design inputs – hydrology, hydraulics
- When to use rock
- General arrangement geometry for groynes & revetments
- Estimating general scour (geomorphic change)
- Estimating local scour
- Sizing rock using three different methods
- Design of granular and geotextile filters
- Key specifications for rock
Outcomes
A better understanding of designing rocks for use in river works.
Who would benefit?
Local authority engineers and asset managers, consultants and contractors actively involved in river management, or who have a specific interest in and experience of rivers and their management.
Presenter
Kyle Christensen - River Engineering Consultant
Spaces limited
To register email Rachael.Armstrong@hbrc.govt.nz
Flood Warning Symposium Building national consistency for flood forecasting and flood warning.
• Steering group projects
• Cyclone Gabrielle review
• Weather forecasting review
• Nationwide flood forecasting
• Overdesign events
The aim of the workshop is to provide a platform for councils and flood response agencies to continue sharing flood management resources and knowledge.
Council Workshop for Flood Practitioners
Wednesday, 24 July, 8:30am – 5:00pm
Flood Warning Symposium
Thursday, 25 July, 8:30am – 5:00pm
Council and Partner Agencies. Including CDEM, GNS, MetService, NEMA, NIWA.
Where Te Pae, Christchurch Convention Centre 24 July 2024
Registration closes 30 June 2024 (unless sold out prior). There is no charge to attend.
There is no charge to attend the workshop.
Catering provided. Optional dinner at own cost.
If you have any questions please email info.nfwsg@boprc.govt.nz
A one-day workshop on practical examples of river management practices, and the context in which options are considered. Participants to bring case studies of recent works or current sites where works are proposed. The workshop will be discussion based, with a short overview of the wider context of river management.
Who would benefit?
Local authority engineers and asset managers, consultants and contractors actively involved in river management, or who have a specific interest in and experience of rivers and their management.
When
Wednesday 29 January 2025
Where
Wellington
Time
One day (9 am to 5 pm)
Cost
$500.00 plus GST.
Council rate – $400.00 plus GST
Where to register
Email Rachael Armstrong - Rachael.Armstrong@hbrc.govt.nz
Key themes
River management options: relating to river type and reach character.
Site context and pre-flood conditions: of flood history, channel changes and sediment transport activity.
Option selection: from potential bank protection and channel management measures.
Relating works to site: dimensioning structural bank works, scoping channel measures and margin vegetation management.
Learning from mistakes: all river management measures are temporary, thus monitoring and observation skills to learn from the river is essential.
Outcomes
A better understanding of river dynamics and the requirements of river engineering, and of different practices used on different types of rivers and around the country.
Presenter Gary Williams, Water & Soil Engineer, FEngNZ
Key Learning Objectives/Outcomes
Familiarity with key principles in fluvial geomorphology and their application to various river management situations (e.g., catchment (and regional) planning, sediment flux issues, and relation to flood hazards).
When
Monday 10 February - Tuesday 11 February 2025
Where
Wellington and Waikanae
Time
Two full days (8am-5pm)
Exact times to be confirmed
Cost
$950.00 plus GST for 2-day course. Council rate – $800.00 plus GST
Where to register
Email Rachael Armstrong - Rachael.Armstrong@hbrc.govt.nz
Key themes
Management issues for which geomorphic insight is fundamental:
- Work with the river (nature-based solutions) – respect diversity, work with process
- Determine what is realistically achievable
- Be proactive, precautionary, pre-emptive – tackle threatening processes
- Risk management
- Integrated Catchment Management
- Active and passive practices (including the do-nothing option) – hard versus soft engineering practices … Role of maintenance (weed management)
- Flood management/protection versus ‘living with a living river’
- Managing river erosion
- Using sediment budgets to manage sedimentation issues (including sand/gravel extraction)
Spatial Dimensions of geomorphologically-informed river management
Catchment
- Fundamental geomorphic unit
- Longitudinal profile – source, transfer accumulation zones
- Network relationships (tributary-trunk stream pattern, flux)
- Connectivity relationships
Channel planform: Braided, wandering gravel-bed, active meandering passive meandering, discontinuous watercourse (wetland/swamp)
Channel geometry
- Downstream and at-a-station hydraulic geometry
- Size and shape
Geomorphic units
- Erosional and depositional forms (and process relations)
- Channel (instream) and floodplain
- Assemblages – and approach to analysis of morphodynamics, condition, recovery (Fryirs & Brierley, 2021)
Bed material size
- Bedrock, Boulder/cobble, gravel-bed, sand-bed, fine-grained
- Bedload, mixed load, suspended load
Temporal dimensions of geomorphologically-informed river management
Timescale: Geologic, geomorphic, engineering
Magnitude-frequency relations
Equilibrium versus non-linear relations
Legacy effect (landscape memory)
Processes of geomorphic river adjustment
- Balance of impelling and resisting forces
- Stream power, shear stress
- Resistance elements – role of riparian vegetation, wood, ecosystem engineers
- Entrainment, transport, deposition (Hjulstrom curve)
- Sediment transport – Bedload, suspended load, solution load
- Aggradation/degradation regime – Lane Balance
Evolutionary trajectory of rivers (and recovery potential)
- Relating character and behaviour (capacity for adjustment/range of variability) to evolutionary trajectory
- Scoping (modelling) prospective river futures to determine what is realistically achievable in management
Geomorphology and river health (condition)
What do we measure where, how and why?
What do we measure against?
Geomorphic relations to Māori conceptualisations of rivers
A living river ethos, mauri, mana, ora
How geomorphology can support river management (indicative only – set up follow up specialist courses)
Scoping river futures - Proactive and precautionary approaches to Visioning & Catchment Planning
Concern for treatment response
Geoethical considerations – concerns for social and environmental justice
- Risk management
- Integrated Catchment Management
- Active and passive practices (including the do-nothing option) – hard versus soft engineering practices … Role of maintenance (weed management)
- Flood management/protection versus ‘living with a living river’
- Managing river erosion
- Using sediment budgets to manage sedimentation issues (including sand/gravel extraction)
Presenters: Ian Fuller, Gary Brierley, Jon Tunnicliffe
A presentation involving forecasting and preparation in the days leading up to the event, immediate response during the event, and rapid rebuild in the days following the event. We’ll touch on a few items from each of these topics and provide some insight as to what went well, and where there is room for improvement.
Presenter: Craig Goodier, Principal Engineer, Hawke's Bay Regional Council
Register in advance for this webinar:
https://zoom.us/webinar/register/WN_yU9O681NS7W5xEpfm1shxA
The impacts when rivers meet landfills are well-known, with the 2019 Fox River disaster showcasing the impacts on an international stage. Join us to talk through the interaction of landfills, natural hazards and climate change. We will explore how we can use data to help understand the scale of the problem for New Zealand.
- Presenters:
- Alex Cartwright
- Alex is passionate about better integrating people and the environment, with extensive experience in New Zealand, Asia and the UK. He focuses on developing knowledge and preparedness for natural hazards and climate change. Alex supports critical infrastructure organisations to assess risk and establish approaches to build resilience.
- Morgan Lindsay
- Morgan is a natural hazard risk and geospatial consultant, who has contributed to projects across New Zealand and the Pacific, that focus on understanding the impacts of natural hazards and climate change. A geospatial specialist, Morgan utilises her geospatial skills to analyse complex problems using large datasets, whilst communicating outputs simply to empower and better prepare communities for natural hazard events.
- Alex Cartwright
Register in advance for this webinar:
https://zoom.us/webinar/register/WN_o5pQao-hQGyue0SxSkj9iA
Prior to the Local Government amalgamation in 1989, Landfills were managed by small poorly resourced councils, and the location and design of these landfills
would not meet modern standards. Many of these were located in vulnerable locations adjacent to beaches or within active river beds. Some of these were then poorly capped with the transfer stations that replaced them installed on top.
These now make up the largest cohort of problematic and at risk contaminated sites within the region.
One such landfill is the Tokomaru Bay landfill which is situated within the bed of the very active Mangahauini River. The position of the landfill has modified the morphology of the river downstream resulting in lateral erosion. Severe storms since Cyclone Cook in 2017 has resulted in repeated erosion of the upstream revetment which protects the landfill and the cost of ongoing protection works has been unsustainable.
The transfer station on the legacy landfill is also vulnerable and storms in 2021, 2022 and then Cyclones Hale and Gabrielle in 2023 resulted in waste stored at the transfer station being washed to Tokomaru Bay Beach.
Funding has now been obtained to relocate the transfer station and remove the legacy landfill underneath.
Register in advance for this webinar: https://zoom.us/webinar/register/WN_Kj5Q3JYURWS1n2DHck392Q
Presenter: Dr Murray Cave
Dr Murry Cave is the Principal Scientist with the Gisborne District Council having joined the council in late 2016. Prior roles included management roles in the Ministry of Energy and then Ministry of Commerce as well as a consultant with Ernst and Young where he worked in the energy and international consulting group. Dr Cave is an experienced Expert Witness having appeared in consent hearings related to Gisborne consent compliance issues relating to Gisborne Forestry and farming prosecutions. He has also been an expert witness before the Environment Court relating to Kuratau River Erosion, Buller Water Conservation Orders, & the Pike River Coal Mine Resource consents. He was an Expert Witness to the Pike River Royal Commission for the Dept of Conservation and others.