The Application of Remote Sensing Technology to the Route Selection of the High Voltage Transmission Lines

Abstract

Satellite remote sensing technology applied in the route selection of the high voltage transmission lines has the advantage that the normal method can't compare to.In the study of the route selection engineering of the 500 kV high voltage direct current transmission lines in Ning-Meng-Shan subsection of northwest-north China,we acquired the relative information of geology,physiognomy and so on in the research district,and analyzed temporal evolution and distribution rule of sand dune and desertification along the route,according to processing multi-temporal images.The result suggests that the sand dune is characterized by semi-active dune,the move speed is very slow,and all round the district desertification shows negative increase.Especially we acquired the digital elevation model based on the contour element of the map and visually simulated dummy three-dimensional geography sight in the study area,also we obtained real three-dimensional surface sight by attaching and compounding the relative remote sensing image,which improved the visual impact.The article proposes two schemes of routing selection according to synthetically analyze landform,physiognomy,engineering geology,lithology,structure,geographical condition,the distributing of habitation and correlative factors based on the results of the processing which mentioned above.It provides the scientific ground for ultimately establishment of the scheme for routing selection on the high voltage transmission lines.