Conflux Threshold of Extracting Stream Networks from DEMs in North Shaanxi Province of Loess Plateau

Li Jun; Tang Guoan; Zhang Ting; Xiao Chengchao

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Conflux Threshold of Extracting Stream Networks from DEMs in North Shaanxi Province of Loess Plateau

- Conflux Threshold of Extracting Stream Networks from DEMs in North Shaanxi Province of Loess Plateau
- Bulletin of Soiland Water Conservation Vol. 26, Issue 2, Pages: 75-78(2007)
- 作者机构：
  
  1. 西北大学城市与资源学系,陕西,西安,710069
  2. 南京师范大学虚拟地理环境教育部重点实验室,江苏,南京,210097
- 作者简介：
- 基金信息：
- DOI：
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- Published：2007
- 稿件说明：
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Li Jun, Tang Guoan, Zhang Ting, et al. Conflux Threshold of Extracting Stream Networks from DEMs in North Shaanxi Province of Loess Plateau[J]. Bulletin of Soiland Water Conservation, 2007, 26(2): 75-78.
DOI：

Li Jun, Tang Guoan, Zhang Ting, et al. Conflux Threshold of Extracting Stream Networks from DEMs in North Shaanxi Province of Loess Plateau[J]. Bulletin of Soiland Water Conservation, 2007, 26(2): 75-78. DOI：

摘要

以陕北黄土高原多地貌类型样区为实验样区

采用5m分辨率的DEM为基本信息源

构建不同汇流阈值与所提取沟壑密度量化关系。实验结果显示

汇流阈值X与沟壑密度Y呈定量统计模型。根据所获得的陕北黄土高原不同地区模型系数值

可有效地构建汇流阈值与沟壑密度之间的定量关系。这对于两者之间的相互求解

特别是科学、合理地确定汇流阈值

提供了理论依据。

Abstract

By taking 5m grid cell DEMs as an experiment basis

the relation between flow accumulation threshold and gully density in the Loess Plateau area

Northern Shaanxi

China

is invest igated quant itat ively and stat ist ica-lly. Experimental results show that a stat istical model could be constructed as a formula. In the formula

the coef f-icient is found to have a strong relat ion w ith terrain complexity and types and play a signif icant role in the model. In the fixed terrain area

a reasonable flow accumulat ion threshold could be derived based on the model

which is of critical significance not only in the theory

but also in application.

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