(c)the pasturing of cattle; when such regulation or prohibition appears to be necessary for any of the following purposes:-(i)for protection against storms, winds, rolling stones, floods and landslips;(ii)for the preservation of the soil on the ridges and slopes and in the valleys of hilly tracts, the prevention of landslips and of the formation of ravines and torrents and the protection of land against erosion or the deposit thereon of sand, stones or gravel;(iii)for the maintenance of water supply in springs, rivers and tanks;(iv)for the protection of roads, bridges, canals and other lines of communication; and(v)for the preservation of public health.