The petition shall be entitled "In the matter of fixing the level of Lake . . . . . . in . . . . . . county, Washington", and shall be filed with the clerk of the court and a copy thereof, together with a copy of the order fixing the time for hearing the petition, shall be served on each owner of property abutting on the lake, not less than ten days before the hearing. Like copies shall also be served upon the director of fish and wildlife and the director of ecology. The copy of the petition and of the order fixing time for hearing shall be served in the manner provided by law for the service of summons in civil actions, or in such other manner as may be prescribed by order of the court. For the benefit of every riparian owner abutting on a stream or river flowing from such lake, a copy of the notice of hearing shall be published at least once a week for two consecutive weeks before the time set for hearing in a newspaper in each county or counties wherein located, said notice to contain a brief statement of the reasons and necessity for such application.