Extraction method for reservoir characteristic curve based on spatial information technology

Abstract

The invention discloses an extraction method for a reservoir characteristic curve based on a spatial information technology. The method comprehensively applies RS, GIS and GPS techniques and a digital elevation model. The method comprises the following steps: extracting a characteristic curve in a dead water level-normal pool level elevation scope based on remote-sensing image water information extraction and a GIS drawing technique, and extracting a characteristic curve in a normal pool level-maximum flood level elevation scope based on a GPS topographic surveying technique and a multi-source spatial data topography modeling technique. Compared with the present reservoir characteristic curve acquiring technique, the method disclosed by the invention has the advantages that a level-area and level-volume curve above the dead water level of the reservoir can be quickly, efficiently and accurately acquired, and the cost is low. Specific to the running reservoir, the method can conveniently check the original reservoir characteristic curve and has significance in reservoir flood preventing and power generation dispatching.

Description

technical field [0001] The invention relates to the technical fields of RS technology, GIS technology, GPS technology and hydrological calculation, in particular to a method for extracting characteristic curves of reservoirs based on spatial information technology. Background technique [0002] After the reservoir has been in operation for many years, there will be some problems of siltation at the bottom of the reservoir, especially for reservoirs built on sandy rivers. The siltation problem is more serious. If the reservoir characteristic curve during the construction of the reservoir dam is followed, the calculation result of the water balance of the reservoir will be affected. Cause flood control safety hazards and affect power generation efficiency. For the reservoirs that have been in operation, the traditional reservoir characteristic curve acquisition and verification method is to use the ultrasonic principle to set a section at a certain interval in the reservoir ar...

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Problems solved by technology

[0004] The object of the present invention is to provide a method for extracting reservoir characteristic curves based on spatial information technology, comprehensively utilizing RS-based water body information extraction technology, GPS-based topographic measurement technology and GIS-based mapping technology, and DEM based on multi-source spatial data Terrain modeling technology can quickly, accurately and efficiently extract the characteristic curve of the reservoir, and facilitate checking with the original curve, so as to solve the problem of time-consuming, laborious and expensive acquisition of the traditional reservoir characteristic curve proposed in the above-mentioned background technology

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