Unitywater Noosa Netserv Plan - Planning Assumptions (Referred from Planning & Environment Committee dated 9 July 2024 - Item 5.1) · Report

GENERAL COMMITTEE MEETING                                                             15 JULY 2024


   C. Note the Netserv Model is a dynamic model and can be updated should any changes occur
      to any of the inputs such as land use scenarios, planning schemes, population projections
      and Development Approvals.




REPORT
Background

The South-East Queensland Water (Distribution and Retail Restructuring) Act 2009 requires all
South East Queensland water service providers to have a Water Netserv Plan. The Netserv plan
provides strategic infrastructure planning forecasts for future water supply and sewerage services
for the next 20 years, including any infrastructure delivery needed for growth in a particular region.

Under Chapter 4B Part 1 Section 99BK of the SEQ Water (Distribution and Retail Restructuring) Act
2009, Part A of UnityWater’s Netserv Plan must be endorsed by each participating council as being
consistent with the planning assumptions for its local government area. Unity Waters Netserv Plan
planning assumptions must also be consistent with the SEQ Regional Plan. Planning assumptions
relate to population, dwellings and employment growth as well as the type, scale, location and timing
of development.

Unitywater has prepared new planning assumptions and demand forecasts for the Netserv Plan
based on Noosa Plan 2020 using the Demand Modeller and Tracking Tool (DMaTT), in collaboration
with Council's strategic planning staff. The key purpose of the DMaTT tool is to facilitate robust,
consistent and ransparent planning assumptions and demand forecasts that are supported by
evidence-based decision making and validated assumptions.

Planning assumption methodology

The DMaTT tool prepares baseline, projected and ultimate development data for dwellings,
population, floor space, employment and network demand. This information is at a property level of
detail and can be summarised and displayed at any catchment scale (i.e. locality or water supply
catchment).

The DMaTT tool has several information inputs which the tool uses to prepare forecast models. The
inputs include State and ShapingSEQ Regional Plan projections, existing landuses, dwellings and
GFA development data, development approvals, Noosa Plan 2020 zones, development provisions
and constraints, proposed planning scheme amendments, development sequencing criteria and GIS
information. Figure 1 shows conceptually how DMaTT forecast models use various information
inputs to prepare growth forecasts and Attachment A provides more detail on inputs, methodology
and forecasts.