(plaintiffs sued estate seeking injunctive relief and damages for flooding of farm property allegedly caused by field dike built on defendant’s land; trial court concluded applicable statute of limitations barred plaintiffs' claims; plaintiffs argued on appeal that trial court erred in concluding claims time-barred and should have applied 15-statute of limitations for adverse possession because flooding “seized” plaintiffs of possession and use of land and flooding constituted “continuous trespass”; on appeal, court held two-year statute of limitations applied because plaintiffs’ claims arise from “defective and unsafe condition” of field dike - complaint time-barred).