A natural stream requires a permanent supply of water by a flow in the same channel with such a degree of regularity that there is running or live stream for considerable periods of time, although it is not necessary that there be a constant or continuous flow and the volume of flow may fluctuate. 1979 Att’y Gen. Op. No. 82. See Rogers v. Petsch, 174 Neb. 313, 117 N.W.2d 771 (1962); Mader v. Mettenbrink, 159 Neb. 118, 65 N.W.2d 334 (1954); Kinney on Irrigation and Water Rights, Second Ed., Volume 1, Section 307.