Landscape Specification

CONTENTS


18.         IRRIGATION SYSTEM

18.1.       GENERAL SPECIFICATIONS
Individual courtyards / levels / areas are to be capable of being individually programmed.

A meter is to be installed to measure the amount of water used by the system.

Water is to be delivered to gardens (as per irrigation plans) via pop up sprays. All sprays to be pop-up on
swing arms and provide min. 200% cover.

All irrigation designs within specified garden areas (refer to irrigation plans) must apply a distribution
uniformity equal to or greater than 75% (DU).

The scheduling of the irrigation system (Automatic Control Programs) shall be set to achieve the maximum
efficiencies possible. The application rate of the system must not be greater than the infiltration rate of the
soil. Pooling of irrigation water on the surface will not be accepted. Adding “cycle & soak” to the irrigation
programs will eliminate this scenario where the application rate of the irrigation system exceeds the
infiltration rate of the soil.

As this contract is Design & Construct based, the contractor is responsible for submitting detailed design
drawings of the proposed irrigation works with their Tender submission.

Full description of the required system and its components are to be listed in the submitted documentation.
This documentation should include drawings and schedule of quantities. It is the responsibility of the
Irrigation Contractor to ensure they have all the relevant documentation and to provide a detailed Schedule
of quantities as part of the Tender Submission. If a "Lump Sum" submission is tendered it will be presumed
that ALL the required items have been included in the Tender price.

If existing Services are located on site, it is the contractor’s responsibility to source ALL existing as
constructed information for ALL services for local authorities or/and client before commencement of works.
The contractor must obtain approval from the client prior to commencement of any excavation in the vicinity
of existing services.

Submit all documents to the Landscape Architect for review and approval.

The equipment and installation processes described are intended to produce an irrigation system which
complies with all applicable industry and local authority and Australian standards.

The Irrigation Contractor will inspect the site and verify the available water flow and pressure, prior to
lodgement of design and Tender. The Irrigation Contractor will be responsible for all works required. Items
not specifically described in this Specification, but which would normally be required to produce a fully
functioning irrigation system are to be considered part of the required works.

It is the Irrigation Contractor’s responsibility to bring to the Client or their Superintendent’s attention any
concerns, potential obstacles or possible improvements before construction commences.


18.2.       IRRIGATION TYPES

   Permanent automated sub-surface irrigation system
   Description – Design, supply, installation and commissioning of a permanent automated sub-surface
   irrigation system. To include pump, controller and all electricals.
   Water supply - From the on-site rainwater collection tank(s) and from the potable main water connection.
   Extent - The system is to cover garden beds specified as per the irrigation plan (refer drawing 750-IR).




URBIS
URB-SPC-LAN-P0025138 - IFC.DOCX                                                                              PAGE   61