[1]BAO Wei-jia,CHENG Xian-fu,CHEN Xu-dong.Effect of Horizontal Resolution of Raster DEM on Drainage Basin Characteristics[J].Research of Soil and Water Conservation,2011,18(02):129-132,138.
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Effect of Horizontal Resolution of Raster DEM on Drainage Basin Characteristics
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
18
Number of periods:
2011 02
Page number:
129-132,138
Column:
Public date:
2011-04-20
- Title:
- Effect of Horizontal Resolution of Raster DEM on Drainage Basin Characteristics
- Keywords:
- DEM; small watershed; horizontal resolution; drainage basin characteristic; topographic index
- CLC:
- TP79
- DOI:
- -
- Abstract:
- Based on digital elevation model (DEM) of the watershed terrain analysis, raster DEM resolution on the results of the analysis has great impact. In this paper, taking Longtan small watershed inupstream of the Hangpu river basin as an example, by means of ten different spatial resolution DEMs of the study watershed from 5 m to 50 m respectively, the basin characteristics were extracted with ArcHydro Tools to investigate the effects of DEMs in different spatial resolution on the performance of the simulations induced by the topographic characteristic parameters. The statistical results showed no evident different derived in the watershed area and longest channel length retrieval from different resolution DEMs, but greater differences were found in total channel length and channel density extractions in small watershed scale. The change of channel density tends to be stable when DEM resolution is lower than 15 m. Compared the extracted results under different resolution of DEMs, it was found that the bigger size of DEM raster is, the more rough extraction of watershed characteristics are. For examining the distribution Curves of Topographic Index (TI) calculated by different grid resolution, it was found that TI was influenced by DEM resolution, TI fluctuates evenly when the highest resolution DEM was employed, but considerably with the poorest resolution DEM being used. The distribution curves of TI calculated by lower than 15 m grid resolution were more discrete and had large different from the highest resolution DEM being used, which implies its potential usage in Suitable resolution selection.
- References:
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[1] 汤国安, 赵牡丹, 曹菡.DEM地形描述误差空间结构分析[J].西北大学学报:自然科学版, 2000, 30 (4):349-352.
[2] 刘学军, 卢华兴, 卞璐.基于DEM的河网提取算法的比较[J].水利学报, 2006, 37 (9):1134-1141.
[3] Callaghan F, Mark D M. The extraction of drainage networks from digital elevation data[J]. Computer Vision, Graphics and Image Processing, 1984, 28:323-344.
[4] 吴险峰, 刘昌明, 王中根.栅格DEM的水平分辨率对流域特征的影响分析[J].自然资源学报, 2003, 18 (2):148-154.
[5] 易卫华, 张建明, 匡永生.水平分辨率对DEM流域特征提取的影响[J].地理与地理信息科学, 2007, 23 (2):34-38.
[6] Quinn P F, Beven K J, Lamb R.The ln (α/tanβ) index:how to calulate it and how to use it within the TOPMODEL framework[J].Hydeological Processes, 1995, 9:161-182.
[7] 庄永忠, 廖学诚, 詹进发.不同网格解析度与流向演算法对莲华池集水区地形指标之影响[J].地理学报 (台湾) , 2007, (50):73-100.
[8] 解河海, 黄国如.地形指数若干计算方法探讨[J].河海大学学报:自然科学版, 2006, 34 (1):46-50.
[9] 唐从国, 刘丛强.基于Arc Hydro Tools 的流域特征自动提取:以贵州省内乌江流域为例[J].地球与环境, 2006, 34 (3):30-37.
[10] Hellweger F. AGREE-DEM Surface Reconditioning System[DB/OL]. http://www.ce.utexas.edu/prof/maidment/ferdi/ferdi/research/agree, 1996.
[11] 李丽, 郝振纯.基于DEM的流域特征提取综述[J].地球科学进展, 2003, 18 (2):251-256.
[12] Bin Yong, Wan Changzhang, Guo Yueniu. Spatial statistical properties and scale transform analyses on the topographic index derived from DEMs in China[J]. Computers & Geosciences, 2009 (35):592-602.
[13] 孔凡哲, 李莉莉.利用DEM提取河网时集水面积阈值的确定[J].水电能源科学, 2005, 23 (4):65-67.
[14] Beven K J, Kirkby N J.A physically based variable contributing area model of basin hydrology[J].Hydrological Sciences Bulletin, 1979, 24 (1):43-69.
[15] 邓慧平, 李秀彬.地形指数的物理意义分析[J].地理科学进展, 2002, 21 (2):103-110.
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