A watershed management plan developed by the Agency under section 4(1)(g) of the Act—
(a) shall be prepared for all the watersheds identified in the water master plan in the order of priority specified in it;
(b) may make provision for—
(i) the prohibition, regulation or control of any activity within the area which, in the opinion of the Agency, it is desirable to prohibit, regulate or control to manage, conserve or enhance water resources,
(ii) the carrying out of any works which, in the opinion of the Agency are desirable to prevent or mitigate the effects of erosion, drainage, pollution or flooding,
(iii) the designation of any area of land to be declared as gathering grounds or areas around gathering grounds in need of protection, and
(iv) the preservation of the environment and particularly the natural attributes of gathering grounds and protected areas.