Appendix E - Integrated Water Management Plan

                                                                                Callaghan & Toth


1.       SUMMARY
The key points of this investigation are as follows:

     1. Roof water runoff is to be collected in six rainwater tanks and recycled to provide
        potable water to toilets and hose cocks for gardens.
     2. Runoff from new access roads, car parks and landscaped areas around the buildings is
        to be cleaned of nutrients and gross pollutants via five Biopods, GPT and then released
        to existing outlets into adjacent vegetation.
     3. The increase in pollutant loads due to the increase in impervious areas is to be
        attenuated.
     4. Water saving devices for new fixtures are required.
     5. The increase in runoff is attenuated by three underground detention/infiltration storage
        systems.


2.       INTRODUCTION
This report was written as part of an MCU application for Noosa Council, and is in accordance
with:
    1. Water Sensitive Design Code in the Noosa Plan
    2. The latest Water Sensitive Urban Design Technical Design Guidelines for South East
       Queensland, published by Health Waterways

The site subject to this report is Lot 2 RP177554 at Cooroy Noosa Road, Tewantin (refer Site
Location Plan Figure 1.1). The current uses on site include landscaped areas and adjacent
bushland.

The Integrated Water Management Plan relates to new Villas, access roads, carparks, café,
pathways and landscaping for the proposed Cartwright Village Extension at Carramar, Cooroy
Noosa Road, Tewantin.

There is a total new roof area of 3526m2 for the Villas and café that flows to seven rainwater
tanks, and a total area of access roads and car parks, pathways and landscaped area of
4524m2 that flows to five Biopods.

In order to receive planning approval from Noosa Council, this site must demonstrate that it
complies with Council’s Water Sensitive Design Code and that the storm water runoff will not
change the surrounding hydrology. Biopods infiltration and above ground roof water tanks are
required for the site. These devices will enable the water quality objectives to be achieved.
Water reuse and water use minimisation are in accordance with the guidelines.

The Model for Urban Stormwater Improvement Conceptualization (MUSIC) has been used to
assess the suitability of various treatment devices and to model existing and predicted pollution
export loads and concentrations.

The rainwater tanks have been sized in accordance with the Queensland Development Code
MP4.3 for toilet use.




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1714-Cartwrigth Village Extension_IWMP.doc                                    January 2018