计算机工程 ›› 2010, Vol. 36 ›› Issue (9): 246-248.doi: 10.3969/j.issn.1000-3428.2010.09.087

• 工程应用技术与实现 • 上一篇    下一篇

基于GIS的区域坡度坡长因子提取算法

张宏鸣1,杨勤科2,刘晴蕊1,郭伟玲3,王春梅3   

  1. (1. 西北农林科技大学信息工程学院,杨凌 712100;2. 西北大学城市与资源学系,西安 710069;3. 中科院水土保持研究所,杨凌 712100)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-05-05 发布日期:2010-05-05

Regional Slope Length and Slope Steepness Factor Extraction Algorithm Based on GIS

ZHANG Hong-ming1, YANG Qin-ke2, LIU Qing-rui1, GUO Wei-ling3, WANG Chun-mei3   

  1. (1. College of Information Engineering, Northwest Agriculture and Forestry University, Yangling 712100; 2. Department of Urbanology and Resource Science, Northwest University, Xi’an 710069; 3. Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 712100)
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-05-05 Published:2010-05-05

摘要: 为提高基于地理信息系统的区域土壤侵蚀研究、水土保持环境效应评价、流域水文分析等的应用效率,设计新的坡度坡长(LS)因子算法,利用正向-反向遍历算法取代原累积坡长算法,以获取区域尺度下的LS因子。实验结果表明,在计算精度允许的范围内,新算法使计算机运行效率有较大幅度的提高。

关键词: 地理信息系统, 数字高程模型, ARC宏语言, 坡度坡长, 中国土壤流失方程

Abstract: In order to enhance the efficiency of application in soil and water erosion, water conservation and watershed hydrological analysis based on Geographic Information System(GIS), this paper designs a new slope Length and slope Steepness(LS) factor algorithm. It uses forward-and-reverse algorithm instead of original cumulative slope length algorithm to obtain LS factor at regional landscape scales. Experimental results determine that the new algorithm makes the computer run efficiency increase within sacrificing accuracy.

Key words: Geographic Information System(GIS), Digital Elevation Model(DEM), ARC Macro Language(AML), slope Length and slope Steepness(LS), Chinese Soil Loss Equation(CSLE)

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