[1]ZHANG Peng,ZHAO Mudan,WANG Yiren.Assessment on the Accuracy of the Modeling Methods of Terrace DEM[J].Research of Soil and Water Conservation,2018,25(05):282-286.
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Assessment on the Accuracy of the Modeling Methods of Terrace DEM
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 05
Page number:
282-286
Column:
Public date:
2018-09-06
- Title:
- Assessment on the Accuracy of the Modeling Methods of Terrace DEM
- CLC:
- P208
- DOI:
- -
- Abstract:
- In the Loess Plateau region, the terrace, as one of the important soil and water conservation measures, has also changed the surface topography while controlling soil erosion. The DEM generating methods considering terrace information greatly compensated the expression defects of traditional DEM with medium and low precision for the terraced terrain, which is of great significance to the surface micromorphology analysis, soil erosion and other surface process evaluation. Taking the 1 m DEM (H-DEM) constructed by laser point cloud data as reference data, we explored the difference of representation for the terraced terrain and evaluated the accuracy of two modeling DEMs-the rapid modeling method for terrace DEM (K-DEM) and the actual ridge-based modeling method for terrace DEM (T-DEM) based on terrain topographic parameters analysis, measurement error, and the DEM terrain representation error (Et). The results showed. (1) Based on the accuracy assessment results of the measurement error and Et, the overall error of the terrain factor is smaller and closer to the T-DEM than K-DEM. (2) The difference of terrace topographic parameter described by elevation, slope and slope length indicates that K-DEM has a larger deviation from H-DEM in the position of terraced field and ridge, and the T-DEM is better. (3) T-DEM is able to describe the actual surface terrain more precisely, but requires more human work, which is more suitable for high-precision researches on terrace.
- References:
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1900-01-01