All drainage districts of this state may, in the discretion of the drainage commissions of said district, permit the use of water from the drainage canals and the putting into drainage canals of water from natural bodies of water or streams, for the purpose of irrigation of farm lands, under such restrictions as the districts may impose when, in the judgment of the commissioners acting on the advice of the engineer of the district or any other competent engineer employed by it, such permit or permits will not be detrimental to the district or injurious to the landowners therein.