This paper summarises the benefits of a comprehensive data collection process and shows examples of how a large amount of data can be utilised for strategic decisions that ultimately lead to better planning and cost-savings.
This paper shares aspects of the scalable solution Auckland Council is adopting, and how other Water Authorities may be able to adopt aspects of Auckland’s solution, to optimise return on investment from modelling projects.
This paper focuses on how the capabilities of the recently released HEC-RAS 2D have been applied successfully to assess flood risk at a highway bridge and evaluate initial design options for flood risk mitigation.
This paper explores the concept of criticality for stormwater assets and its alignment with the typical corporate Risk Management Framework. It also outlines a robust approach for identifying which assets are critical and it illustrates the wide range of asset management approaches that should vary according to the criticality of the asset.
Managing stormwater runoff involves controlling the quantity and quality of runoff to mitigate adverse effects on receiving environment. Stormwater runoff can be managed by implementing stormwater management systems that can be integrated with various stormwater management devices.
The paper outlines the assessment method, outputs, value gained from the study process and the resulting confidence gained by Council to make an informed decision on the retention and upgrading of this asset.
The Kauri Flats School stormwater design was a complex and challenging process with multiple external influences, design considerations and safety requirements required to develop an innovative, resilient and flexible outcome.
The New Zealand Transport Agency’s Auckland Motorway Alliance (AMA) maintains and operates the Auckland motorway network and is dedicated to improving the motorway experience for customers and stakeholders.
Kilbirnie sits on low lying land in Wellington, marginally above high tide level. The suburb floods frequently, including internal flooding to businesses and dwellings during extreme events. The flooding is at odds with plans to intensify the area by recent district plan changes.
This paper summarizes water and sediment quality data from PTS streams collated during four “snapshot surveys” conducted over a 12 year period and provides a summary of any trends and compliance of this data with environmental guidelines for aquatic ecosystem health and contact recreation.
Following the recent Canterbury earthquakes the flood risk to large parts of Christchurch increased due to land damage, ground levels going down greater than 500mm in some places and lateral spread along the creeks draining large parts of the city.
The aim of this research was to assess the hydraulic performance of raingardens over time. Six Auckland raingardens were selected for permeability testing using a double-ring infiltrometer, based on the availability of historical data. Additionally, the state of maintenance and factors affecting the performance were assessed.
The implementation of stormwater management strategies has become commonplace across New Zealand. As the objectives and drivers of these strategies become increasingly complex and multi-faceted, a clear understanding of the changes in hydrology and water quality resulting from urban development is recognised as being critical to support decision making and align with regulations.
Stormwater runoff from roads creates detrimental impacts downstream. This is a result of an increased level of stormwater runoff conveying contaminants to downstream receiving environments.
In this paper we look at the likely environmental effects of climate change in two contrasting regions of New Zealand, how these will affect aquatic ecology and the implications for stormwater management.
This paper will seek to share the lessons so painfully learnt across the world over recent years and how unprepared communities, businesses and infrastructure actually is for extreme flood risks and rainfall that seem to be occurring with greater regularity.
Flood management strategies often conflict with environmental dynamics by taking them out of play using ‘defensive’ engineering solutions to resist the effects of severe flooding and erosion.