A party who seeks to have title in real estate quieted in him on the ground that it is accretion land to which he has title has the burden of proving accretion by a preponderance of the evidence. Monument Farms, Inc. v. Daggett, 2 Neb. App. 988, 520 N.W.2d 556 (1994); State v. Matzen, 197 Neb. 592, 250 N.W.2d 232 (1977).