43 In response to Mr Smith's concerns on Principles 2 and 3 of the NSW State Rivers and Estuaries Policy, Mr Lampert states that in relation to Principle 2, grazing will be completely removed from the riparian zone and as a result the land will be managed through a combination of private ownership and local government management processes with an opportunity for participation by local community groups. In relation to Principle 3, Mr Lampert identifies the major degrading processes as grazing and the disruption to water flows caused by existing road and rail bridges adjacent to the site. With the approval, grazing activities will be removed and while it is impossible to remove the upstream and downstream bridges, the land will be reshaped and rehabilitated to minimise the impact of these bridges. These impacts include the concentration of water into narrow gullies with the resultant increased flow velocities. The wetlands will be created adjacent to the watercourse, which will fan out floodwater activity and reduce the flow velocity so that natural processes can be reintroduced into the locality.
Findings
44 A comprehensive analysis of the application of ESD principles is found in the judgment of Preston CJ in Telstra Corporation Ltd v Hornsby Shire Council (2006) 146 LGERA 10, at paras [107]-[124]. In subsequent decisions, in particular Bentley v BGP Properties Pty Ltd [2006] NSWLEC 34, Preston CJ has elaborated on the particular principles of ESD. The two principles relevant in this matter are the principles identified as (1) and (3) in Schedule 1 to the LEP 2002, namely the precautionary principle, and conservation of biological diversity and ecological integrity.
Ecological Integrity
45 In considering the term "ecological integrity", Preston CJ in Bentley v BGP Properties Pty Ltd [2006] NSWLEC 34 states:
60 At a macro level, ecological integrity involves conservation of the ecological processes that keep the planet fit for life. They "shape climate, cleanse air and water, regulate water flow, recycle essential elements, create and recreate soil, and enable ecosystems to renew themselves": IUCN, UNEP, WWF, Caring for the Earth: A Strategy for Sustainable Development , Oxford University Press, 1992 at p. 9.
61 Maintaining ecological integrity involves maintaining ecosystem health. Ecosystems become unhealthy if their community structure (species richness, species composition or food web architecture) or ecosystem functioning (productivity, nutrient dynamics, decomposition) has been fundamentally upset by human pressures: M Begon, C R Townsend and J L Harper, Ecology: From Individuals to Ecosystems, 4th ed, Blackwell Publishing, 2006, p. 645.
62 Maintaining ecological integrity also involves maintaining ecosystem functioning and ecosystem services. Ecosystem functioning is "the sum total of processes such as the cycling of matter, energy, and nutrients operating at the ecosystem level": R A Virginia and D H Wall, " Ecosystem Function, Principles of" in S A Levin (ed), Encyclopaedia of Biodiversity, Academic Press, 2001, Volume 2, p. 345. Ecosystem services are "the wide array of conditions and processes through which ecosystems, and their biodiversity, confer benefits on humanity; these include the production of goods, life support functions, life-fulfilling conditions, and preservation of options": G Daily and S Dasgupta, "Ecosystem Services, Concept of", in S A Levin (ed), Encyclopaedia of Biodiversity, Academic Press, 2001, Volume 2, p. 353.