The article covers the issue of changes in the scope of ownership of land bordering with the flowing waters. Detailed studies will be carried out on registered parcels of land, in the direct neighborhood of the river Ropa - the area of the city Biecz. The data obtained will allow to determine in what extent the flowing waters cause changes in the existing boundaries of the parcels, forcing a re-determination of the coastline, and what is the effect of the influence that waters have on the agricultural production area. ...