【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。更多还原

【Abstract】 By taking 5 m 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 investigated quantitatively and statistically.Experimental results show that a statistical model could be constructed as a formula.In the formula,the coefficient is found to have a strong relation with terrain complexity and types and play a significant role in the model.In the fixed terrain area,a reasonable flow accumulation threshold could be derived based on the model,which is of critical significance not only in the theory,but also in application.更多还原