[1]FANG Lei,LIU Wen-zhao,LI Huai-you.Terrain Feature Extraction and Analysis of the Yanwachuan Basin in Loess Tableland-gully Region Based on GIS[J].Research of Soil and Water Conservation,2010,17(03):7-11.
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Terrain Feature Extraction and Analysis of the Yanwachuan Basin in Loess Tableland-gully Region Based on GIS
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
17
Number of periods:
2010 03
Page number:
7-11
Column:
Public date:
2010-06-20
- Title:
- Terrain Feature Extraction and Analysis of the Yanwachuan Basin in Loess Tableland-gully Region Based on GIS
- Keywords:
- DEM; terrain factors; spatial analysis; terrain feature
- CLC:
- P931;TP79
- DOI:
- -
- Abstract:
- With the using of GIS, many topographical distribution characteristics information of Yanwachuan basin which located in typical tableland-gully region can be obtained. This study extracted the contour lines from 1:50 000 topographic map firstly, and utilized Hutchinson’s algorithm to create DEM (ANUDEM), from which much surface morphology information such as slope, profile curvature and slope length are extracted, and their characteristic are discussed then. The results showed that 50% of the area concentrated below 9 degrees and the slope curvature less than 7, which indicated that the relatively flat area is the most distributed area. Slope length distribution mainly concentrated in 10~150 m, and 10 m is the most distributed area. The information provided a strong technology and basic data support for ecological construction and agricultural production in Yanwachuan basin and similar areas.
- References:
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1900-01-01