Seven years on from obtaining a global network consent for discharging stormwater from the urban catchment in Hastings, has the ‘road map’ adopted for the Hastings District Council, resulted in better environmental, and compliance outcomes?
This paper will consider the drivers, methods and tools used to support delivery of ICMPs, along with implementation and examples of the types of outcomes, pre and post ICMPs.
The Central Interceptor is a new wastewater tunnel proposed to run between Western Springs and the Mangere wastewater treatment plant (WWTP). The project is needed to ensure there is sufficient capacity in the network to meet planned population growth and development in Auckland, provide a more resilient wastewater system, and provide an initial remedy to historic wet weather discharges in central Auckland.
This paper is a follow on to the 2009 Water NZ paper “Gisborne Wastewater Scheme: Successfully Re-Defining a Community Project”. It provides a history of the Gisborne wastewater story from the commissioning of the long-sea outfall in 1965 through to the conclusion of the 2016 Alternative Treatment and Disposal study, which sets the scene for further options assessments.
Swarms of midges can cause a seasonal nuisance near wastewater treatment ponds in New Zealand and around the world. New Zealand midges (Chironomus Zealandicus) lay eggs in layers of sediment along pond edges, whereupon larvae hatch and undergo four stages of development, prior to emergence as adults two to seven weeks later (depending on water temperature)
This paper outlines the technical evaluation and project decision making processes adopted to increase confidence in the input information and evaluation method used to decide upon the final size of pump rates and storage volumes.
A case study on the Waitomo Village oxidation pond system showed significant improvement in treatment capability by the installation of a surface based horizontal venturi fine diffusion aeration system called the Aquarator.
The paper intends to provide an overview of emergency response techniques employed by Hamilton City Council, the methodology used to control immediate and future risk associated with the incident, issues encountered by personnel throughout the emergency response, repair, and business continuity phases, and also to share lessons learnt throughout each stage of the incident.
This paper describes how risk based safety principles have been implemented on metal pipeline networks in New Zealand and what data needs to be transferred between pipeline and power utilities to facilitate effective coordination.