Functional Expansion Of GPS Program Development In Diaoyutai Reservoir Scale Demonstration And Its Application Research

The reservoir is human water power, irrigation and flood control scheduling of important facilities, since liberating, throughout the country built many reservoirs. Reservoir flood regulating runoff in the rational use of water resources has played an enormous benefit, the storage capacity of the reservoir and siltation volume changes are very concerned about the problem of water conservancy and electric power department. The storage capacity and sedimentation volume determination to ensure the reservoir, dam safety and scheduling power plays an important role in. Due to siltation and other reasons, the storage capacity of the reservoir will change, often required capacity check and measurement.Global positioning system (GlobalPositioning System, referred to as GPS) is nineteen eighties to appear at the beginning of a new three-dimensional positioning measurement technology, it is not subject to time and geographical constraints, measuring point is not needed between the mutual visibility. At first, this technique should be used only in the United States military position and national civil geodesy, along with the computer, the development of communication technology, the emergence of a real-time dynamic GPS (Real Time Kinematical, referred to as RTK) positioning method, this method can fast, dynamic, accurate positioning, its application in reservoir capacity measurement positioning, can be achieved satisfied with the results.The traditional storage calculation using the contour of the cone formula and section measurement. Contour method is assumed to be two contour between the volume change is linear, to two elevation between topography cannot accurately reflect, particularly on relatively flat terrain area, calculation results error. In order to improve the calculation accuracy must be encrypted contour; this will greatly increase the difficulty of a graph. Section method to calculate reservoir is the main reservoir set in parallel section, between the requirements section topographic variation is more uniform, linearity, this method is simple, small workload, acquisition point number is too low, so its accuracy is poor, and the calculation for different elevation reservoir capacity calculation is extremely cumbersome. When the reservoir area terrain is complex, longitudinal time tributaries of reservoir, calculation accuracy will be difficult to ensure.Rely on modern high precision GPS positioning technology, echo sounding techniques, with the aid of underwater topographic survey method on measurement, according to the change of underwater topography complexity, such as pitch, high density measuring point in the survey area waters cover; established in high precision, high density measuring points on the basis of, using terrain map draw the triangle network construction method, the whole area to triangular mesh cover, calculated for each of the three corner column of water volume and sedimentation volume, and all three corner column volume are superimposed, can obtain reservoir capacity precision calculation results.