A riverworks district may be established so as to enable a water entity to undertake and manage works or do any act, matter or thing for any or all of the following purposes:

(a) removing, cutting and trimming vegetation and other matter in or on the bed and banks of watercourses and lakes, overhanging them or likely to fall into them and cause environmental harm or pose a risk to public safety or property;

(b) undertaking works in channels so as to stabilise streambeds and streambanks and mitigating against the adverse effects of flooding;

(c) protecting the banks of watercourses and lakes by the use of vegetation, riparian fencing and appropriate river engineering techniques;

(d) removing obstructions where appropriate technical advice has identified that those obstructions are contributing to flooding or streambank damage;

(e) changing the course of watercourses;

(f) controlling or regulating the flow of water in watercourses;

(g) raising or lowering the level of lakes;

(h) planting trees and other vegetation for the purpose of slowing down water running into watercourses and lakes and of protecting banks of watercourses and lakes;

(i) protecting areas of important natural values, such as native vegetation, threatened species, sites of geo-conservation significance, significant habitat and sites of historic, cultural or Aboriginal significance;

(j) the maintenance, repair, control and management of watercourses and lakes, or of any works specified in this section or of the places where they are, or have been, carried out;

(k) any other similar activity which may assist in giving effect to the objectives of this Act or in carrying out a water management plan.