[1]ZHANG Chuancai,QIN Fen,WANG Yongxin,et al.Multi-Scale Quantification of Topographic Feature Using Three-Dimensional Fractal Model and Its Scale Effect in Watershed—A Case of the Two-Tiger Valley of Pisha Sandstone Area[J].Research of Soil and Water Conservation,2016,23(01):278-283,288.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
23
Number of periods:
2016 01
Page number:
278-283,288
Column:
Public date:
2016-02-28
- Title:
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Multi-Scale Quantification of Topographic Feature Using Three-Dimensional Fractal Model and Its Scale Effect in Watershed—A Case of the Two-Tiger Valley of Pisha Sandstone Area
- Author(s):
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ZHANG Chuancai1,2,3, QIN Fen1,3, WANG Yongxin1, LIU Zhenzhen1, CHEN Yunsheng1, LIU Zhidan1
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1. College of Environment and Planning, He’nan University, Kaifeng, He’nan 475004, China;
2. College of Surveying and Mapping, Anhui University of Science and Technology, Huainan, Anhui 232001, China;
3. Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, He’nan University, Kaifeng, He’nan 475004, China
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- Keywords:
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quantifying topographical character; Pisha sandstone; topographical three-dimension fractal; scale effect of landform
- CLC:
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P931.6
- DOI:
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- Abstract:
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Scientific quantification of topographic feature is one of the key issues in geomorphology and development of erosion model. In view of the existing problems on terrain simulation, geomorphology quantification model structure, geomorphology three-dimensional fractal model is optimized based on GIS and fractal theory, and topographic feature for Two-tiger valley in Pisha sandstone area is quantified based on multi-scale UAV DEM data and the fractal model, and scale effect of three-dimensional dimension on the area is discussed. The research found that: (1) as the topographic scale is reduced, three-dimensional fractal dimension decreases linearly, which means that terrain complexity decreases linearly; (2) terrain complexity under 10 m scale of Two-tiger valley is far less in Pisha sandstone area; (3) according to analysis on terrain quantification results based on multi index, terrain quantification indices can be divided into two types: terrain complexity index and terrain undulation index. The terrain complexity index has scale effect, and the terrain undulation index has no scale effect.