The Beamline Layout Design Based on the Mathematical Model for Different Water Terrain

Abstract

Multi-beam sounding is one of the important components of marine surveying. For different water terrain, if the line layout scheme can be reasonably formulated according to the principle of multi-beam sounding, it can greatly improve the sounding efficiency and reduce the loss of manpower, material resources and time while ensuring the accuracy of the sounding results.Based on the different water terrain, the definition of overlap rate and the calculation method in simple cases are given first.For the water with flat bottom terrain, the main selection of isobath, control different spacing and Angle to meet the overlap rate requirements as much as possible.For waters with relatively rugged and changeable underwater terrain, the water area is first rationally divided into several sub-areas, in which the underwater depth and slope change little. Then, the plane fitting is carried out for each sub-area, and the wiring idea of flat underwater terrain is adopted for wiring. For two adjacent areas with similar water depth, the water area is divided into several sub-areas.The starting end of the survey line in the latter area should be made to coincide with the end end of the survey line in the previous area. For the calculation of the coincidence rate, the data points at each depth of the bottom are iterated several times to determine whether they are in the overlapping part of the measurement area of the two survey lines, so as to arrange the multi-beam survey line as far as possible to meet the corresponding requirements.