METHOD FOR DETERMINING THE RELATIVE ELEVATION OF POINTS IN A NEAR-SHORE AREA AND MEASURING DEVICE FOR ESTABLISHING A STABLE INSTANTANEOUS WATER LEVEL

摘要

The invention relates to a method in which the relative position of one or more geodetic points with respect to one or more other points of known height is determined so that a stable instantaneous water level is established in a confined area of the dead water; the relative height of the point of known height with respect to the instantaneous water level is determined; the relative heights of the geodetic points with respect to the instantaneous water level are determined; and the difference between the known height and the relative height of the point of known height is added or educted, respectively, to said relative heights of geodetic points.The stabile instantaneous water level may be established in preferably portable devices containing a measuring container (16) and a cover (18) provided with a hole (17) for equalizing air pressure; a telemeter (19) suspended on support means (21) for vertical adjustment, said support means being mounted on said cover (18); a wave and wind breaker jacket (15) arranged on supports (13) and a flexible water inlet pipe (27) connected to a stub (26) arranged at the bottom level of the measuring container (16) and passing through an opening (25) on the jacket (15), for communication between the container (16) and the dead water.