Government may prohibit obstructions of rivers, etc., within certain limits.

11. Government may prohibit obstructions of rivers, etc., within certain limits. Whenever it appears to the State Government that injury to the public health, or public convenience, or to any irrigation work or to any land for which supply from an irrigation work is available, has arisen or may arise from the obstruction of any river, stream or natural drainage channel, the State Government may, by notification, prohibit within limits to be defined in such notification, or may, within such limits, order the removal or other modification of such obstruction; and thereupon so much of the said river, stream or natural drainage channel as is comprised within such limits, shall be deemed to be a drainage work as defined in section 2.