Tauranga City Council’s Stream & Estuary Clean-up Programme has evolved over time from one or two ad hoc clean-ups per year involving a few dozen participants to a Downer sponsored inter-council programme that in 2016 involved over 1500 students from 17 schools taking part in 10 events.
Assessments of urban development projects often neglect, isolate or defer recognition and provision for manawhenua values. A decision support system (DSS) developed to evaluate outcomes of alternative urban development and stormwater management scenarios on freshwater and estuarine water bodies takes a different approach.
The paper discusses the availability in New Zealand of generally available information in contaminant annual load data to predict loads of nutrients (Nitrogen N and Phosphorus P) and bacteria (E.coli and Faecal coliforms FC) for stormwater catchments.
One of the major sources of drinking water for Cape Town, South Africa had been suffering from blue-green algal growth. This raised concerns over the cost of treating water containing algal by-products and the potential health implications.
This paper sets out some underlying principles on which the application of the NRCS method to Auckland were based, and how it was adapted and validated to suit the particular requirements that ARC had defined.
This paper provides an overview of the proposed treatment drain technology, a description of the trial, associated testing regime and trial results, and comments on potential applications of this new technology in New Zealand.
This paper outlines key considerations in the design of Stormwater for large scale industrial developments, assessment of risks, suggests associated priorities, and addresses the relative merits of the various design solutions.
This paper will present case studies of projects where hybrid treatment systems has been applied. It will provide further discussion in regards to the benefits of using a hybrid design. In particular, performance, space constraints and costs.
Addington Brook in Christchurch, receives stormwater runoff from a 246 ha catchment of mixed industrial/commercial/residential land use. Instream water quality monitoring has shown elevated suspended solids, metal and nutrient concentrations along the brook, which is thought to be a major contributor of these pollutants to the Ōtākaro/Avon River and downstream estuary.
Existing studies of sediment retention ponds (SRPs) have examined the effect of pond layout, inlet and outlet geometry and installation of baffles on the performance of the SRPs.
This paper presents various ways on how drainage management becomes a vital consideration in development. The paper aims to show that planning for necessities such as road infrastructure and sanitation point towards a single aim that is stormwater management.
The purpose of this paper is to identify design, manufacturing, implementation and maintenance procedures that enhance bioretention treatment device performance in regard to maintaining pollutant removal and hydraulic conductivity rates.
During earthworks on Canterbury’s Port Hills, highly erodible loess sub-soil is exposed to potential erosion. Stormwater discharged from such sites can contain large quantities of fine sediments that stay in suspension and are challenging for treatment systems to remove.
Low impact designs (LID) such as raingardens treat stormwater runoff through a combination of physicochemical and biological processes, including filtration, adsorption, phytoremediation, and bioremediation.